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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 do non functional sodium channels affect the signaling capabilities of neurons?
When sodium enters the neuron, it depolarizes it. This means that the neuron becomes more positive. This can lead to the neuron reaching threshold and then initiate an action potential.
When the sodium channels are NOT functional, the sodium can not enter and depolarize it. Therefore the threshold can not be met and action potential will not occur.
If the sodium channels are inactive in an nociceptive neruon (carries information about pain), then the it will prevent you from feeling pain.
What are the overall function of the nervous system?
Feel pressure and heat, and provide feedback to the brain concerning the body (the nervous system also sends a signal to our brain to limit our muscles from overusing).
What ia a chromatophilic substance?
What is chromatophilic substance?
The chromatophilic substance, of Nissl bodies, are the orderly arrangement of rough endoplasmic reticulum. The proteins from these Nissl bodies are used to restore peripheral nerve fibers.
Is there a cause for hypoesthesia and what causes it?
Hypoesthesia, which is the partial loss of sensitivity to sensory stimuli or having diminished sensation, is caused by the damage or impingement of any part of a nerve that gives sensation. A common cause is neuropathy from Diabetes Mellitus.
Is increased cognitive functioning an antagonistic effect of the sympathetic nervous system?
no, increased cognitive functioning is not
What do both the endocrine and nervous systems allow you to do?
The endocrine and nervous systems allow your body to regulate body functions. The endocrine system does so through hormones, and the nervous system through nervous impulses.
What function does the brain perform in our nervous system?
The brain directs the conscious motor functions of the body, the primary sensory receive and process from our senses, speech and language, factual memory formation and short term memory. Also the regulation of many differing functional traits such as affection, emotion and behavior and motor learning.
What is the scope of physiology?
The scope of physiology is in depth because physiology is the study of all of the functions throughout life. Some of the types of physiology are molecular, cellular, and integrative.
sensory, interneuron, motor nueron
Convulsions/seizures are caused by abnormal electrical activity in the brain. For a bit of background, the brain is part of the central nervous system, which controls and 'instructs' the body on what to do. The brain sends these instructions out using electrical impulses and signals.
If the brain becomes confused, for whatever reason, the electrical impulses may begin to send abnormal impulses to the wrong places and via the incorrect neurons. This causes the body to get confused and results in abnormal twitching and convulsing.
People with a medical condition called epilepsy have an abnormal brain electrical activity giving rise to epileptic seizures.
Seizures/convulsions can also be caused by a brain tumour or another nervous system disorder. It is vital every seizure is reported to your medical practitioner.
If the seizure last for longer than normal, or if it is your first seizure, seek urgent medical assistance or phone for an emergency ambulance.
What role does the nervous system play in muscle contraction?
controls the muscles by the motor nurons.
It depends on the neuron. They all have a cell body. They have dendrites and some have dendrites plus axon(s).
What is the part of the autonomic nervous system that normally dominates when a person is relaxed?
The part of the autonomic nervous system that normally dominates when a person is relaxed is the parasympathetic nervous system. This system is responsible for promoting a state of rest and digestion, slowing the heart rate, and enhancing digestive activities. It helps the body conserve energy and recover from stress, facilitating relaxation and restorative processes.
What is the function of the sensory system?
The somatosensory cortex processes the tactile information that comes in from all over your body. It is organized in a topographical way - each body part is represented in a specific areas. Some body parts are represented far larger than their relative size. These are areas that are very sensitive, like your hands. Other areas are represented quite limited, because they have less tactile nerves/are less sensitive.
What is a somatic and an autonomic nervous system action?
Somatic is when you move on purpose.
Autonomic is when you react without thinking.
What is a compound nervous tissue?
The spinal cord and all nerves are composed of nervous tissue. The myelin sheath conducts nerve impulses.
