Most of our brain cells are glial cells, once thought to be mere support cells, but now understood as having a critical role in brain function. Glial cells in the human brain are markedly different from glial cells in other brains, suggesting that they may be important in the evolution of brain function.
Thomas R. Insel
Both in Britain and America, huge publicity has been given to stem cells, particularly embryonic stem cells, and the potential they offer. Of course, the study of stem cells is one of the most exciting areas in biology, but I think it is unlikely that embryonic stem cells are likely to be useful in healthcare for a long time.
Single cells analyze thousands of stimuli from the microenvironment they inhabit. The more awareness an organism has of its environment, the better its chances for survival. When cells band together they increase their awareness exponentially. Division of labor among the cells in the community offers an additional survival advantage. The efficiency it enables more cells to live on less. Evolution is based on an instructive, cooperative interaction among organisms and their environment enables life forms to survive and evolve in a dynamic world.
Bruce H. Lipton
Lately, however, on abandoning the brindled and grey mosquitos and commencing similar work on a new, brown species, of which I have as yet obtained very few individuals, I succeeded in finding in two of them certain remarkable and suspicious cells containing pigment identical in appearance to that of the parasite of malaria. As these cells appear to me to be very worthy of attention ... I think it would be advisable to place on record a brief description both of the cells and of the mosquitos.
Like Honeycrisp, SweeTango has much larger cells than other apples, and when you bite into it, the cells shatter rather than cleaving along the cell walls, as is the case with most popular apples. The bursting of the cells fills your mouth with juice. Chunks of SweeTango snap off in your mouth with a loud cracking sound.
In nerve-free multicellular organisms, the relationships of the cells to each other can only be of a chemical nature. In multicellular organisms with nerve systems, the nerve cells only represent cells like any others, but they have extensions suited to the purpose which they serve, namely the nerves.
...and suddenly it hits you: Human skin is actually made up of billions of tiny units of protoplasm, called "cells"! And what is even more interesting, the ones on the outside are all dying! This is a fact. Your skin is like an aggressive modern corporation, where the older veteran cells, who have finally worked their way to the top and obtained offices with nice views,are constantly being shoved out the window head first, without so much as a pension plan,by younger hotshot cells moving up from below.
The brain is a tissue. It is a complicated, intricately woven tissue, like nothing else we know of in the universe, but it is composed of cells, as any tissue is. They are, to be sure, highly specialized cells, but they function according to the laws that govern any other cells. Their electrical and chemical signals can be detected, recorded and interpreted and their chemicals can be identified; the connections that constitute the brain's woven feltwork can be mapped. In short, the brain can be studied, just as the kidney can.
David H. Hubel
You've got to get away from the idea cancer is a disease to be cured. It's not a disease really. The cancer cell is your own body, your own cells, just misbehaving and going a bit wrong, and you don't have to cure cancer. You don't have to get rid of all those cells. Most people have cancer cells swirling around inside them all the time and mostly they don't do any harm, so what we want to do is prevent the cancer from gaining control. We just want to keep it in check for long enough that people die of something else.
Perhaps we are like cells in the mind of God, contributing to celestial functions beyond our ken, just as our cells unknowingly fashion our thoughts and actions. Perhaps the laws of nature order and constrain even the living and eternal Deity from which they spring, and of which they are a part.
Each of our cells is a living entity, and the main thing that influences them is our blood. If I open my eyes in the morning and my beautiful partner is in front of me, my perception causes a release of oxytocin, dopamine, growth hormones - all of which encourage the growth and health of my cells. But if I see a saber tooth tiger, I'm going to release stress hormones which change the cells to a protection mode. People need to realize that their thoughts are more primary than their genes, because the environment, which is influenced by our thoughts, controls the genes.
Bruce H. Lipton
When the finely tuned balance among the different parts of bodies breaks down, the individual creature can die. A cancerous tumor, for example, is born when one batch of cells no longer cooperates with others. By dividing endlessly, or by failing to die properly, these cells can destroy the necessary balance that makes a living individual person. Cancers break the rules that allow cells to cooperate with one another. Like bullies who break cooperative societies, cancers behave in their own best interest until they kill their larger community, the human body.
There's really no such thing as the agony of dying. I'm quite sure that pain is shut off at the moment of death. You see, something happens when the body knows it's about to go. Peptide hormones are released by cells in the hypothalamus and pituitary gland. Endorphins. They attach themselves to the cells responsible for feeling pain.
Can I tell you a boring science fact?" she whispered. "I bet you didn't learn it in Shadowhunter history class." "If you're trying to distract me from talking about my feelings, you're not being very subtle about it." He touched her face. "You know I make speeches. It's okay. You don't have to make them back. Just tell me you love me, " "I'm not trying to distract you." She held up her hand and wiggles the fingers. "There are a hundred trillion cells in the human body, " she said. "And every single one of the cells of my body loves you. We shed cells, and grow new ones, and my new cells love you more than the old ones, which is why I love you more every day than I did before. It's science. And when I die and they burn my body and I become ashes that mix with the air, and part of the ground and the trees and the stars, everyone who breathes air of sees the flowers that grow out of the ground or looks up at the stars will remember you and love you, because I love you that much, " She smiled. "How was that for a speech?
So someday in the near future hopefully rather than having a foot or a leg amputated we'll just give you an injection of the cells and restore the blood flow. We've also created entire tubes of red blood cells from scratch in the laboratory. So there are a lot of exciting things in the pipeline.
The human brain is the last, and greatest, scientific frontier. It is truly an internal cosmos that lies contained within our skulls. The more than 100 billion nerve cells and trillion supporting cells that make up your brain and mine constitute the most elaborate structure in the known universe.
Stem cells are probably going to be extremely useful. But it isn't a given, and even if it were, I don't think the end justifies the means. I am not against stem cells, I think it's great. Blanket objection is not very reasonable to me-any effort to control scientific advances is doomed to fail. You cannot stop the human mind from working.
We don't notice that our cells are turning over all the time. You get a completely new composition of cells every seven years, and on the surface, or subjectively, it looks as though you're the same for seven years. It's like a ground - it looks stable, but beneath it, everything is shifting all the time. It's exciting and dangerous.
Given the opportunity, under the right conditions, two cells from wildly different sources, a yeast cell, say, and a chicken erythrocyte, will touch, fuse, and the two nuclei will then fuse as well, and the new hybrid cell will now divide into monstrous progeny. Naked cells, lacking self-respect, do not seem to have any sense of self.
Hormonal changes permanently alter the breast's structure. And when a pregnancy is terminated through abortion, the process is interrupted, which leaves cells in a sate of transition. And they say cells in this state have a very high risk of becoming cancerous. So the woman's chances of developing breast cancer later in life my be greatly increased.
I have recently observed and stated that the serum of normal people is capable of clumping the red cells of other healthy individuals... As commonly expressed, it can be said that in these cases at least two different kinds of agglutinins exist, one kind in A, the other in B, both together in C. The cells are naturally insensitive to the agglutinins in their own serum.
They also knew that there was a string of DNA at the end of each chromosome called a telomere, which shortened a tiny bit each time a cell divided, like time ticking off a clock. As normal cells go through life, their telomeres shorten with each division until they're almost gone. Then they stop dividing and begin to die. This process correlates with the age of a person: the older we are, the shorter our telomeres, and the fewer times our cells have left to divide before they die. By the early nineties, a scientist at Yale had used HeLa to discover that human cancer cells contain an enzyme called telomerase that rebuilds their telomeres. The presence of telomerase meant cells could keep regenerating their telomeres indefinitely. This explained the mechanics of HeLa's immortality: telomerase constantly rewound the ticking clock at the end of Henrietta's chromosomes so they never grew old and never died.
We've left the moment. It's gone. We're somewhere else now, and that's okay. We've still got that moment with us somewhere, deep in our memory, seeping into our DNA. And when our cells get scattered , whenever that happens, this moment will still exist in them. Those cells might be the biulding block of something new. A planet or star or a sunflower, a baby. Maybe even a cockroach. Who knows? Whatever it is, it'll be a part of us, this thing right here and now, and we'll be a part of it.
The average person doesn't understand what a stem cell is. There's a lack of health literacy in our nation. So the public can't really get into this dialogue because they don't understand the complexity of stem cells, not the faith-based approach, not the ideological or political, but the science behind stem cells.
Fact: Cells are constantly dying and new ones are taking their place Fact: After seven years have gone by, every cell in my body has died and a new one has taken its place. Do the math. That means that every seven years, I'm a totally new me. not one of the old cells remains. Twice, I've had a total makeover
The elementary parts of all tissues are formed of cells in an analogous, though very diversified manner, so that it may be asserted, that there is one universal principle of development for the elementary parts of organisms, however different, and that this principle is the formation of cells.
One can envisage taking cells from a patient with sickle-cell anaemia or an inherited blood disorder and using the Cas9 system to fix the underlying genetic cause of the disease by putting those cells back into the patient and allowing them to make copies of themselves to support the patient's blood.
There was only silence. It was the silence of matter caught in the act and embarrassed. There were no cells moving, and yet there were cells. I could see the shape of the land, how it lay holding silence. Its poise and its stillness were unendurable, like the ring of the silence you hear in your skull when you're little and notice you're living the ring which resumes later in life when you're sick.
Ew. Someone put the dog out, "Rosalie murmured wrinkling her nose. Have you herd this one, Psycho? how do a blond's brain cells die?" She didn't say anything. Well?" I asked."Do you know the punch line or not?" She looked pointedly at the TV and ignored me. Has she heard it?" I asked Edward. No." He answered. Awesome. So you'll enjoy this, bloodsucker--a blond's brain cells die alone.
We are but cells living in a much larger organism, however, this does not make our existence less significant - for an organism without cells is no organism at all. We define it; we make it what it is. We are responsible for its health, its functionality, and above all, its purpose. A lone cell can restore the others, or a lone cell can spread a plague.
The task of neural science is to explain behaviour in terms of the activities of the brain. How does the brain marshall its millions of individual nerve cells to produce behaviour, and how are these cells influenced by the environment...? The last frontier of the biological sciences "" their ultimate challenge "" is to understand the biological basis of consciousness and the mental processes by which we perceive, act, learn, and remember.
Mom said, "His spirit is there," and that made me really angry. I told her, "Dad didn't have a spirit! He had cells!" "His memory is there." "His memory is here," I said, pointing at my head. "Dad had a spirit," she said, like she was rewinding a bit in our conversation. I told her, "He had cells, and now they're on rooftops, and in the river, and in the lungs of millions of people around New York, who breathe him every time they speak!
Jonathan Safran Foer
We should not be too quick to dismiss our own [ocular] arrangement. As so often in biology, the situation is more complex...we have the advantage that our own light-sensitive cells are embedded directly in their support cells (the retinal pigment epithelium) with an excellent blood supply immediately underneath. Such an arrangement supports the continuous turnover of photosensitive pigments. The human retina consumes even more oxygen than the brain, per gram, making it the most energetic organ in the body.
Exercise stimulates growth plates, by putting pressure on bone cells, forcing them to specialize and create new cells. Too much pressure, however, damages the growth plates, which are soft and fragile... The rule of thumb is that lifting one's own body weight (in push-ups, pull-ups, etc) is fine at any age, and kids over fifteen can lift weights.
What is wrong with looking muscular? Muscles are beautiful. Strength is beautiful. Muscle tissue is beautiful. It is metabolically, medically, and philosophically beautiful. Muscles retreat when they're not used, but they will always come back if you give them good reason. No matter how old you get, your muscles never lose hope. Few cells of the body are as capable as muscle cells are of change and reformation, of achievement and transcendence.
I would imagine that fighting an unwelcome colonial occupation is like fighting a malignant cancer. Destroying the cancerous cells one by one becomes a necessity for one's very survival. Shooting down members of a colonial occupying force one by one is the exact equivalent of destroying those cancerous cells. And to some extent, one assumes, more satisfying to those trying to be rid of the cancer.
If you inhale a millionth of a gram of plutonium, the surrounding cells receive a very, very high dose. Most die within that area, because it's an alpha emitter. The cells on the periphery remain viable. They mutate, and the regulatory genes are damaged. Years later, that person develops cancer. Now, that's true for radioactive iodine, that goes to the thyroid; cesium-137, that goes to the brain and muscles; strontium-90 goes to bone, causing bone cancer and leukemia.
If you think or say, 'I always get jetlag when I travel,' your cells receive 'jetlag' as a command, and they must carry out your instructions. Think and feel that you have a weight problem, and your cells receive the order of a weight problem. They must follow your instructions and keep your body in an overweight condition.
The extracellular genesis of cells in animals seemed to me, ever since the publication of the cell theory [of Schwann], just as unlikely as the spontaneous generation of organisms. These doubts produced my observations on the multiplication of blood cells by division in bird and mammalian embryos and on the division of muscle bundles in frog larvae. Since then I have continued these observations in frog larvae, where it is possible to follow the history of tissues back to segmentation.
When two people become entangled, one person will conform to the energy of the other person. When one of them is a healer whose cells are vibrating at a higher level, the client's cells become entangled, and their energy is lifted. That's why that old saying, "physician heal thyself," is so important, even though most don't understand it: If the physician's energy is going to influence or, in scientific terms, "entrain" the patient's, the doctor's must be higher.
Bruce H. Lipton
Molecular biology has shown that even the simplest of all living systems on the earth today, bacterial cells, are exceedingly complex objects. Although the tiniest bacterial cells are incredibly small, weighing less than 10-12 gms, each is in effect a veritable micro-miniaturized factory containing thousands of exquisitely designed pieces of intricate molecular machinery, made up altogether of one hundred thousand million atoms, far more complicated than any machine built by man and absolutely without parallel in the nonliving world.
God is a creative force, Lestat. And so are we. He told Adam, 'Increase and multiply.' That's what the first organic cells did, Lestat, increased and multiplied. Not merely changed shape but replicated themselves. God is a creative force. He made the whole universe out of Himself through cell division. That's why the devils are so full of envy-the bad angels, I mean. They are [i]not[/i] creative creatures; they have no bodies, no cells, they're spirit. And I suspect it wasn't envy so much as a form of suspicion-that God was making a mistake in making another engine of creativity in Adam, so like Himself. I mean the angels probably felt the physical universe was bad enough, with all the replicating cells, but thinking, talking beings who could increase and multiply? They were probably outraged by the whole experiment. That was their sin." "So you're saying God isn't pure spirit." "That's right. God has a body. Always did. The secret of cell-dividing life lies within God. And all living cells have a tiny part of God's spirit in them, Lestat, that's the missing piece as to what makes life happen in the first place, what separates it from nonlife. It's exactly like your vampiric genesis. You told us that the spirit of Amel-the evil entity-infused the bodies of all the vampires... Well, men share in the spirit of God in the same way.
I am asking myself what is fear not what I am afraid of. I lead a certain kind of life; I think in a certain pattern; I have certain beliefs and dogmas and I don't want those patterns of existence to be disturbed because I have my roots in them. I don't want them to be disturbed because the disturbance produces a state of unknowing and I dislike that. If I am torn away from everything I know and believe, I want to be reasonably certain of the state of things to which I am going. So the brain cells have created a pattern and those brain cells refuse to create another pattern which may be uncertain. The movement from certainty to uncertainty is what I call fear.
Of course the more you love the sinner the more you hate and make war on the sin, just as the more you love the person, the more you hate and kill the cancer cells that are killing the person. Compassion for cancer cells does not come from compassion for persons; it comes precisely from lack of compassion for persons.
In AP Bio, I learned that the cells in our body are replaced every seven years, which means that one day, I'll have a body full of cells that were never sick. But it also means that parts of me that knew and loved Sadie will disappear. I'll still remember loving her, but it'll be a different me who loved her. And maybe this is how we move on. We grow new cells to replace the grieving ones, diluting our pain until it loses potency. The percentage of my skin that touched hers will lessen until one day my lips won't be the same lips that kissed hers, and all I'll have are the memories. Memories of cottages in the woods, arranged in a half-moon. Of the tall metal tray return in the dining hall. Of the study tables in the library. The rock where we kissed. The sunken boat in Latham's lake, Sadie, snapping a photograph, laughing the lunch line, lying next to me at the movie night in her green dress, her voice on the phone, her apple-flavored lips on mine. And it's so unfair. All of it.
The late Alan Gregg pointed out that human population growth within the ecosystem was closely analogous to the growth of malignant tumor cells within an organism: that man was acting like a cancer on the biosphere. The multiplication of human numbers certainly seems wild and uncontrolled... Four million a month-the equivalent of the population of Chicago... We seem to be doing all right at the moment; but if you could ask cancer cells, I suspect they would think they were doing fine. But when the organism dies, so do they; and for our own, selfish, practical... reasons, I think we should be careful about how we influence the rest of the ecosystem.
Saw a film on cancer yesterday, shown by the English delegation. No doubt about it. I'm right. "Migratory cancer cells" are amoebic formations. They are produced from disintegrating tissue and thus demonstrate the law of tension and charge in its purest form - as does the orgastic convulsion. Now money is a must - cancer the main issue - in every respect, even political. It was a staggering experience. My intuition is good. I depend on it. Was absolutely driven to buy a microscope. The sight of the cancer cells was exactly as I had previously imagined it, had almost physically felt it would be. Cancer is an autoinfection of the body, of an organ. And researchers have no idea of what, hor, or where!!
Exercise has a direct brain connection, when you consider what it actually does. What we tend to overlook are the feedback loops that connect the brain to every cell in the body. Therefore when you throw a ball, run on a treadmill, or jog along the shore, billions of cells are "seeing" the outside world. The chemicals transmitted form the brain are acting the way sense organs do, making contact with the outside world and offering stimulation from that world. This is why the jump from being sedentary to doing a minimal amount of exercise - such as walking, light gardening, and climbing the stairs instead of taking the elevator - is so healthy. Your cells want to be part of the world.