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Nerves
Nerves are thread-like structures that form a network of pathways that transmit information from the brain to the body and the body to the brain, in the form of electrical impulses.
1,605 Questions
How important is sleep to your overall functioning throughout the day?
Some sleep experts suggest that neurons used during the day repair themselves during sleep. When we experience sleep deprivation, neurons are unable to perform effectively, and the nervous system is impaired.
What is the branching filaments that that conduct nerve impulses towards the cell?
Dendrite is the branching filaments that conduct nerve impulses towards the cell.
It refers to the underside of something, usually a fish. Also refers to the belly area.
Nerve blockades, which involve the injection of an anesthetic into the area around a sensory or motor nerve that supplies a particular region of the body, preventing the nerve from carrying nerve impulses to and from the brain.
Can rheobase be a threshold stimulus?
Yes, it can be because threshold and rheobase both are the voltage required to generate an action potential. The difference lies in that the treshold can be a voltage higher than rheobase.
TENS
What is the path a nerve impulse travels throughout your body from stimulus to response-?
from the point of the impulse to the brain through neurons
Acetylcholine- a neurotransmitter released at the neuromuscular junction triggers a muscle action potential, which leads to muscle contraction
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What accounts for the resting membrane potential seen in unstimulated nerve and muscle cells?
Sodium-potassium pump
Yes you would report it separately.
How to calculate the speed of propagation of the nerve impulse in a nerve fiber?
The velocity of nerve conduction is usually assessed by dissecting out a nerve fiber from an animal such as a frog. The nerve is placed in a chamber containing stimulating and recording electrodes. The responses of the nerve can be monitored using an oscilloscope. More detail on this procedure can be found in the related link.
What affect does lowering extracellular calcium have on the resting membrane potential of a neuron?
Low calcium levels in the extracellular fluid increase the permeability of neuronal membranes to sodium ions, causing a progressive depolarization, which increases the possibility of action potentials. These action potentials may be spontaneously generated, causing contraction of skeletal muscles (tetany).
What are effects of damage to lower neuron?
Damage to lower motor neurons can lead to muscle weakness, atrophy, and fasciculations due to the loss of direct connection between the spinal cord and muscles. Patients may experience decreased muscle tone and reflexes, resulting in flaccid paralysis. Additionally, the affected muscles may become incapable of voluntary movement, significantly impacting mobility and overall function.
