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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
How does the cardioscular system and the nerves system work together?
The autonomic nervous system regulates the cardiovascular system. The parasympathetic division innervates the heart via the vagus nerve. The sympathetic division also innervates the heart, but additionally, it supplies innervation to the smooth muscle lining blood vessels. The sympathetic division has a substantial effect on blood pressure, and on local blood flow, via constriction of arterioles.
The cardiovascular system is important to maintain supply of oxygen and nutrients, and removal of wastes, from the nervous system.
What is the function of the autonomic nervous system?
The function of the autonomic nervous system is to control involuntary actions, or body functions that must operate even without conscious awareness of those functions. It regulates heart activity, acting like brakes and accelerators to decrease or increase the heart rate.
What carries mssages from the central nervous system to other parts of the body?
peripheral nervous system
What carries impulses toward the neuron cell body?
Sensory neurons, also known as Afferent neurons carry information toward the CNS.
I don't know that's what im trying to figure out.
Which cranial nerve is responsible for equilibrium?
The 8th.
Hey - I remembered it, the vestibulocochlear nerve.
What part of the brain routes nerve impulses from your senses?
Most nerve impulses from our senses are routed through the: Thalamus-
Cranial nerves
Cranial Nerves only originate in the brain and carry messages to and from structures in the head and neck.
The cells in the nervous system that receive and send neurotransmitter messages?
impulses travel to and from the central nervous system allowing the brain and spinal cord to control all your other body systems
Short term effects of exercise?
However different types of exercise will have different effects upon the muscles exercised. For example high intensity low duration exercise will produce strength, size and power gains while low intensity long duration exercise will produce endurance type benefits.Tone; Refers to the state of readiness of a muscle. This is the state that a muscle is in when it is relaxed and how able it is to respond to its task. An unused, untrained muscle will have poor tone and will respond slowly and with greater difficulty to a task than a trained muscle.Posture; Refers to the way in which we hold our bodies when sitting, walking or running. Regular exercise performed correctly will encourage good posture which enables muscles to work efficiently and will help to prevent injuries.Hypertrophy; Is when a cell, in this case a muscle cell, increases in size through growth. Extreme hypertrophy may result in the cells splitting to create new ones.Atrophy; Is when a muscle shrinks due to injury or lack of use. so that is the short term effect of exercise on the muscular system.
What does the nervous system compose of?
peripheral nervous system
the peripheral nervous system
periphera
The peripheral nervous system branches from the central nervous system
It is called the Peripheral Nervous System(PNS).
Why is it called the functional unit of the nervous system?
A neuron.
^ he is asking why, not what
^it's (neuron) called so, because the nervous system is composed mainly of the brain, spinal cord and nerves (neurons). since most of the nervous system is made of neurons, they are called the structural unit of NS, meaning that the NS is composed of these neurons.
What type of nerves fibers make of each of the following sensory nerves?
Well, there are really only three types of fibers, but they all have different sub-classes to them. A, B, and C. A and B fibers are myelinated, and C fibers are unmyelinated. A fibers are broken down further by conduction velocity into 4 main groups, alpha, beta, gamma, and delta. In general a chart of these fibers would look something like this..
A(alpha), largest and fastest velocity, acts as motor and sensory fibers
A(beta), next largest, acts as motor and sensory.
A(gama), next largest, acts as motor only.
A(delta), next largest, acts as sensory only.
B, smaller than A fibers, only acts a motor.
C, smallest, acts as motor and sensory. In general, the A class of fibers are related to muscles(extrafusal and intrafusal fibers), A(delta) sensory fibers relay touch, pressure, pain, and temp, B motor fibers are for the autonomic system, while C sensory fibers are also for pain and temp. Note. Sometimes the sensory fibers are classified by a roman numeral system from I to IV. They are the same fibers, just numbered differently. They look like this... A(alpha) = Ia
A(alpha) = Ib
A(beta) = II
A(delta) = III
C = IV Hope this helps...
Daniel {| |- | A 1-20 5-120 0.3-0.5 B <4 3-15 1.2 C 0.3-1.5 0.6-2.5 2.0 |}
Which part of the neuron is capable of generating an action potiential?
When a neuron gets excited from a neighboring cell (from neurotransmitters) it gets 'leaky' to certain ions like sodium, potassium, calcium and chloride - and in doing so its state of electrical excitability changes. If it changes by just the right amount then special proteins called 'voltage-gated ion channels' will open allowing a huge influx of even more ions (usually sodium) causing a wave of electrical charge to flow away from the cell body down its axon to its axon terminal - where it will then release its neurotransmitters.
Why is the nervous system necessary?
Cholesterol is needed by the nervous system to insulate neurons and prevent damage that would interfere with the normal function of the nervous system.
Calcium also plays an important role in the central nervous system, especially within the brain. Calcium ions are essential in converting electrical impulses into chemical signals in the brain. The presence of calcium ions in the synaptic vesicles triggers the neurotransmitters to be released into the synaptic cleft. The signal can then cross the cleft and fuse with the dendrite on the other side, effectively helping to pass the signal to wherever it needs to go in the brain.
What neuron carries impulses from receptors to the central nervous system?
Neurons that convey sensory information are called 'sensory neurons' or "afferent neurones"
What is the function of the medula oblongata?
it extend the spinal cord through four fifth of the spinal column
What is way you can keep nervous system healthy?
The following activities, if maintained on a life-long basis, can help keep the nervous system operating at peak efficiency:
- eating a proper diet low in fat and high in fiber
- maintaining a healthy weight
- consuming proper amounts of good-quality drinking water
- getting adequate rest
- engaging in regular exercise
- not smoking or taking illegal drugs
- drinking only moderate amounts of alcohol (if at all)
- reducing stress levels
What is the most important part of the digestive system?
Ice cream is the most important absorbing organ in the digestive system.
Describe how schwann cells form the myelin sheath and the neurolemma encasing the nerve processes?
The Schwann cells wrap themselves tightly around the axon like a jellyroll. During the wrapping process, the cytoplasm is squeezed from between adjacent layers of the Schwann cell membranes, so that when the process is completed a tight core of plasma membrane material encompasses the axon. This wrapping is the myelin sheath. The Schwann cell nucleus and the bulk of its cytoplasm end up just beneath the outermost portion of its plasma membrane. This peripheral part of the Schwann cell and its exposed plasma membrane is the neurilemma.
What body parts work together in the nervous system?
Your central nervous system controls your entire body via the spinal cord.
Which part of the nervous system regulates breathing?
The answer to this one is medulla:))))))))(((((((((
