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In some muscle tissue acetylcholine causes vaso-dilation, but not all. Norepinephrine is the opposite competor/effector of acetylcholine. Acetylcholine is present in all preganglionic fibers, both parasympathetic and sympathetic. Acetylcholine is present in postganglionic parasympatic fibers, where norepinephrine is present in the postganglionic sympathetic fibers. In some tissues acetylcholine causes constriction. Can also reduce heart rate vi the vagus nerve. Acetylcholine is the only neurotransmitter used in the somatic nervous system! Acetylcholine can effect vasodilation by several mechanisms, including activation of endothelial nitric oxide (NO) synthase and prostaglandin (PG) production. In human skin, exogenous Acetylcholine increases both skin blood flow and bioavailable NO levels, but the relative increase is much greater in skin blood flow than NO. So this may lead us to speculate that acetylcholine may dilate cutaneous blood vessels through PGs, as well as NO. In some muscle tissue acetylcholine causes vaso-dilation, but not all. Norepinephrine is the opposite competor/effector of acetylcholine. Acetylcholine is present in all preganglionic fibers, both parasympathetic and sympathetic. Acetylcholine is present in postganglionic parasympatic fibers, where norepinephrine is present in the postganglionic sympathetic fibers. In some tissues acetylcholine causes constriction. Can also reduce heart rate vi the vagus nerve. Acetylcholine is the only neurotransmitter used in the somatic nervous system! Acetylcholine can effect vasodilation by several mechanisms, including activation of endothelial nitric oxide (NO) synthase and prostaglandin (PG) production. In human skin, exogenous Acetylcholine increases both skin blood flow and bioavailable NO levels, but the relative increase is much greater in skin blood flow than NO. So this may lead us to speculate that acetylcholine may dilate cutaneous blood vessels through PGs, as well as NO.
By the body, naturally, no. What you have is what you have. But with new scientific deelopments like stem cell research, growing specialized cells like brain cells may be possible.
toxins can harm the brain by eliminating brain cells. say someone inhales a certain chemical. it may not kill them but they will lose brain cells. too much of one chemical could be fatal.
The adult human brain typically contains around 86 billion nerve cells, or neurons. Additionally, the brain contains other types of cells called glial cells, which may outnumber neurons by up to 10 to 1. Overall, the brain is composed of a vast network of cells that work together to control bodily functions and processes.
When you play mindless games on a computer many brain cells die of bordom, if you do useful work on a computer you may well grow new brain cells
No, spitting a lot does not make you lose brain cells. Brain cells are not affected by the act of spitting. However, excessive spitting may be a sign of certain medical conditions that should be addressed by a healthcare professional.
Frankincense has been shown to have anti-inflammatory and neuroprotective properties that may help improve brain function and reduce the risk of neurodegenerative diseases. It may also have mood-enhancing effects and help reduce stress and anxiety.
Yes, the human brain is estimated to have over 100 billion neurons, or brain cells, which are responsible for transmitting information throughout the brain and body. However, the exact number can vary among individuals and may change over time.
Regular exercise has been shown to have a positive impact on brain health and may help reduce the risk of developing dementia. Exercise can improve blood flow to the brain, reduce inflammation, and promote the growth of new brain cells. Additionally, staying active can help maintain overall cognitive function and memory as we age.
Your brain is made up of billions of nerve cells. They communicate by releasing chemical messengers called neurotransmitters. Each neurotransmitter is like a key that fits into a special "lock," called a receptor, located on the surface of nerve cells. When a neurotransmitter finds its receptor, it activates the receptor's nerve cell. The nicotine molecule is shaped like a neurotransmitter called acetylcholine. Acetylcholine and its receptors are involved in many functions, including muscle movement, breathing, heart rate, learning, and memory. They also cause the release of other neurotransmitters and hormones that affect your mood, appetite, memory, and more. When nicotine gets into the brain, it attaches to acetylcholine receptors and mimics the actions of acetylcholine. Nicotine also activates areas of the brain that are involved in producing feelings of pleasure and reward. Recently, scientists discovered that nicotine raises the levels of a neurotransmitter called dopamine in the parts of the brain that produce feelings of pleasure and reward. Dopamine, which is sometimes called the pleasure molecule, is the same neurotransmitter that is involved in addictions to other drugs such as cocaine and heroin. Researchers now believe that this change in dopamine may play a key role in all addictions. This may help explain why it is so hard for people to stop smoking. For the source and more detailed information concerning this subject, click on the related links section (NIDA) indicated below.
Tau is a protein which may be responcible for alziemers; it tangles nerve cells therefore killing brain cells.
Certain drugs may cause brain cells to die. However, the main cause of brain cells dying is aging. This may happen quicker and earlier in some people who have a history of Alzheimer's Disease or Multiple Sclerosis.