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Why is the threshold voltage for nerve lower than the threshold voltage for muscles?
Wiki User
∙ 12y ago
assignment sa physiology ceu? XD
Wiki User
∙ 12y ago
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What controls how fast your body uses energy?
Your Brain has nerve's which send's How fast and slow you use it, Your spinal cord transfers these messages and thats how fast you use it. And your muscles
When does saltatory conduction occur?
Saltatory Conduction is a means by which action potentials are transmitted along myelinated nerve fibers. The cytoplasm of an axon is electrically conduction and because myelin inhibits charge leakage through the membrane, depolarization at one node of Ranvier is sufficient to elevate the voltage at a neighboring node to the threshold for action potential initiation. Therefore in myelinated axons, instead of axon propagating as waves but they occur at successive nodes and 'hop' along the axon. This means of travel is much faster than they would otherwise (120 m/sec compared to 35m/sec in unmyelinated nerve fibers). Another advantage of this is that energy is saved as sodium potassium pumps are only required at specific points along the axon. Sean Sinclair
How would the relationship between the stimulus voltage and the amplitude of the response differ on a single nerve fiber?
Someone pls answer. I also need to know for my lab report that's due in an hour and halfs time.
What is nerve conduction velocity test?
Nerve conduction velocity test-- A test that measures the time it takes a nerve impulse to travel a specific distance over the nerve after electronic stimulation.
Is ventricular systole responsible for nerve impulse?
no ventricular diastole is responsible for nerve impulse
Why is the threshold voltage for nerve lower than the threshold voltage for muscle?
assignment sa physiology ceu? XD
Is conducting stimulus strong enough to generate a nerve impulse?
It depends on the strength of the stimulus. A threshold voltage has to be reached before the nerve can be stimulated.
Why is the amplitude of the compound action potential recorded from the frog sciatic nerve increased when the voltage of the stimulus was increased above the threshold value?
when the voltage of the stimulus is increased above threshold, it can instantly trigger the action potential into a depolarizing state which will rapidly shoot up above the threshold value.
Why does the nerve action potential increase slightly when you add 1.0 V to the threshold voltage and stimulate nerve?
The action potential increases slightly because more neurons are being stimulated.
Where in the body is sciatic nerve located?
The sciatic nerve is the largest single nerve in the human body; it runs from each side of the lower spine through deep in the rear and back of the thigh and all the way down to the foot, connecting the spinal cord with the leg and foot muscles.
What is the main function of the muscolocutaneous nerve?
innervates the flexor muscles of the arm and skin of the lateral side of the lower arm
Which cranial nerve innervates all muscles of mastication?
tongue, buccal and and those controlling mandible....muscles of the lower face. mastication = the process of chewing
What is the nerve supply of the muscles of facial expression?
The facial muscles are innervated by facial nerve (cranial nerve VII). In contrast, the nearby masticatory muscles are innervated by the mandibular nerve, a branch of thetrigeminal nerve (V).
What muscles does sural nerve supply?
The sural nerve is cutaneous and therefore does not supply any muscles.
What are the muscles known as neurovascular entrappers?
Scalene muscles(anterior & middle fibers) can entrap the lower trunk of the brachial plexus, causing neuropraxia of ulnar nerve
What is the major nerves serve the most anterior forearm muscle?
The median nerve supplies most of the flexor muscles of the human forearm, and some hand muscles. The ulnar nerve also supplies two flexor muscles, and most of the remaining hand muscles that the median nerve does not cover.
What does nerve?
A motor nerve is part of the nervous system that moves muscles.
