0
Nervous System
This category is for questions about the mechanical and chemical process of reactions to internal and external stimuli, ranging from the brain down to the spinal cord, and all nerves, cells and tissues in between.
3,047 Questions
What is the process when the nervous system makes you feel hungry or thirsty?
Maintaining homeostasis.
Wgat PArt of the nervous system includes the brain and spinal cord?
Unlike the Peripheral nervous system, the Central Nervous System includes the brain and the spinal chord.
How does dmt affect the nervous system?
imagine you get pushed backwards by an almighty invisible force, then you arrive in another universe. you see intelligent beings far superior to anything on earth and they have made gifts for you. and a god like creature emurges from them and shares with you the secrets of the universe and all of a sudden you understand why everything is the way it is. DMT makes LSD and magic mushrooms look insignificant in comparison.
Exerpt from wikipedia:
Total loss of visual connection with reality. The senses cease to function in the normal way. Total loss of ego. Merging with space, other objects or the universe. The loss of reality becomes so severe that it defies explanation. The earlier levels are relatively easy to explain in terms of measurable changes in perception and thought patterns. This level is different in that the actual universe within which things are normally perceived ceases to exist.
What does your brain have to do in order to learn something new?
people learn in different ways. First you have to figure out how you learn. Can you follow directions and remember them when someone tells you? Yes? Then you are an auditory learner. Do you see things and remember them? Yes? Then you are a Visual Learner. Do you have to touch things in order to remember them? Yes? then you are a kinisthetic learner. You can be more then one or even all 4. There are others. Check out Gardners theory of learning.
Can a nerve fibre and nerve both carry sensory and motor impulses?
There are the Mixed Nerves in the spinal column that carry both sensory and motor nerves, but these neurons have 2 different jobs that they do,& I know of no neurons doing both as the impulses travel to 2 different locations which couldn't be done at the same time.
Increased sympathetic activity causes the afferent arterioles of the renal glomerulus to constrict, thereby reducing blood flow into the glomerulus. Because a decrease in blood flow reduces blood pressure in the glomerulus, which is the driving force for filtration, GFR decreases.
How many pairs of dorsal nerves are there?
There are 12 pairs of Dorsal nerves also know as thoracic nerves. They emerge from the thoracic vertebrae hence the name.
How many efferent neurons are used in a somatic action potential?
The autonomic reflex contains two. (preganglionic and postganglionic)
What is the relationship between olfactory and gustatory receptors?
Gustatory receptors are part of the sense of taste. They are in your mouth. Olfactory receptors are part of the sense of smell. They are in your nose.
What are the parts of a nerve cell?
the parts of the nerve cell are cell body,dendrites,and axon, axon teminals, nucleus,
What are sight smell taste hearing and touch called?
COOKING!
Sight:well you need to see what your putting in the food that your cooking
Taste:you need to taste what your cooking so its not gross or if you need to add something
Smell:the smell of the food cooking so if you smell burring smell well you know that you burned your food or not
Touch:well you need to touch your food when your putting it on the plate
Hearing:to hear if the water is boiling over or if you are cooking something on a timer and it rings when the food is done
What are the benefits of hazelnuts?
Plenty of fiber
High-quality protein with amino acids
B vitamins and vitamin E
Calcium, magnesium, potassium
Healthy (mono-unsaturated) fat
Phytosterols (they lower cholesterol)
Skip the after-work candy bar and have a fistful of almonds!
(try to get the unsalted ones)
Is the parasympathetic system controls the fight or flight responses?
The Parasympathetic Division is in charge of "rest and digest" and has a calming effect on many body functions. The sympathetic division is in charge of the "fight or flight" increasing breathing rate allowing more oxygen intake, and increase of heart rate allowing more blood to flow throughout body.
How does other systems depend on the nervous system?
its dependant because the nervous system sends messages to the brain to do things like make the heart pump, breath, move etc. etc.
What class of drugs has an arousal effect on the central nervous system?
Mainly diazepinics, antihistamines, anti-allergics, and a lot of other drugs, legal and illegal ones.
How feedback loops in the nervous and endocrine systems regulate conditions in the body?
feedback loops maintain balance and homeostasis.
How could damage to the nervous system affect another body system?
none of the other body systems could function without direction from the nervous system or energy provided by the digestive and circulatory systems.
Spinal nerve roots which contain only motor neuron axons?
the what? root of a spinal nerve consists of motor neuron axons
What are the main sub divisions of the nervous system?
The human nervous system is widely held to be comprised of seven parts.
1. The Spinal Cord
The spinal cord serves as a medium for motor and sensory information to travel throughout the body, and also coordinates certain reflexes.
2. The Medulla
The medulla comprises of the lower half of the brain stem and controls many autonomic functions of the human body such as breathing and heart rate.
3. The Pons
The pons is located on the brain stem and relays signals that deal with activities such as sleeping, hearing, bladder control, and eye movement.
4. The Cerebellum
The cerebellum is an area of the brain responsible for motor control such as coordination and precision. It also contributes to the function of other things such as language and emotions.
5. The Midbrain
The midbrain, or mesencephalon is part of the brain stem that contributes to hearing, eye movement, and basic motor skills.
6. The Diencephalon
The Diencephalon is a part of the brain that is responsible for regulating several vital functions such as body temperature and hunger, while also affecting things such as sleep and alertness.
7. The Cerebral Hemispheres
The Cerebral Hemispheres are two separate parts of the brain responsible for a myriad of functions. The right hemisphere is responsible for things such as estimating, intonation, and holistic reasoning. The left hemisphere is concerned with skills such as direct retrieval of facts, exact calculations, and vocabulary.
Why are the nervous and endocrine systems important?
The endocrine is one of the most important systems of the body. There are two systems that control the body, endocrine and nervous. The endocrine is basically producing and managing your hormones, making sure there isn't too much or too little. In the pituitary gland alone you secrete 9 hormones such as:
1) Growth Hormone (GH) - which codes for your body to grow. If you have to much of this you have Giantism, which is lethal and you grow to be a giant. Those who have too little Growth hormones have a condition called Pituitary Dwarfism.
2)Antidiuretic hormone (ADH) - basically maintains your fluid volume. Monitoring your blood, water, urine, etc. volume, making sure you don't get dehydrated by not allowing the formation of urine. If your ADH levels are to low, you can get Diabetes Insipidus or suffer severe dehydration.
3) Thyroid Stimulating Hormone (TSH) - stimulates the thyroid to release the thyroid hormone. Decreased TSH levels can create Cretinism in children and increased levels can cause hyperthyroidism, Graves Disease, and similar.
4) Adrenocorticotropic Hormone (ACTH) - causes the release of glucocorticoids (which are essential to life influencing the energy metabolism of most body cells and they help us resist stressors) and androgens. It is very rare to have decreased levels, however increased levels of ACTH cause Cushings Disease.
5) Follicle-stimulating hormone (FSH) - in females it stimulates ovarian follicle maturation and the production of estrogen. In males stimulates sperm production. Too little causes failure of sexual maturation while there is no effect should you have an overproduction.
6)Luteinizing Hormone (LH) - in females triggers ovulation and stimulates the ovarian production of estrogen and progesterone; in males LH promotes testosterone production. The effects of too high and too little are the same as for FSH.
7) Prolactin (PRL) - promotes lactation; too little causes poor milk production in nursing women while too high causes inappropriate milk production and impotence and breast enlargement.
8) Oxytocin - stimulates uterine contraction, stimulates labor, and initiates milk injection; there are no known effects for too high or too little amounts of Oxytocin.
9) Parathyroid Hormone (PTH) -
