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When a nervous impulse travels from a neuron to a muscle cell what happens next?
Wiki User
∙ 9y ago
When a signal reaches the end of a neuron it releases neurotransmitters into the synapse where they bind to receptors to release the second messenger into the next neuron.
If you are confused I highly recommend this website: http:/learn.genetics.Utah.edu/content/addiction/reward/neurontalk.html
Wiki User
∙ 14y ago
Wiki User
∙ 9y agoIf I remember correctly :
Proteins in the (muscle) cell's membrane change shape (functionally expanding)
to allow Ca ions to enter the cell.
This sets off a series of steps ending in actin & myosin shifting electron orbits,
which causes those two molecules to change position with each other,
which shortens the muscle cell.
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Steps in impulse transmission?
Brain send the message via nerve impulses involving neurons which use the neuro-transmitter AcetylcholineEach nerve impulse begins in the dendrites of a neuron's. the impulse move rapidly toward the neuron's cell body and then down the axon until it reaches the axon tip.a nerve impulse travels along the neuron in the form of electrical and chemical signals.Acetylcholine- a neurotransmitter released at the neuromuscular junction triggers a muscleaction potential, which leads to muscle contraction
What might cause a person to tremble?
Fear, nervous tension, cold, muscle spasm .....
What is a similarity between a reflex action and a voluntary action?
Both require motor neurones to carry the nerve impulse to the effector in order for the muscle to contract carry out an action.
What are the four tissue types of the human body?
Epithelium - Tissues composed of layers of cells that cover organ surfaces such as surface of the skin and inner lining of digestive tract: the tissues that serve for protection, secretion, and absorption.Connective tissue - As the name suggests, connective tissue holds everything together. Connective tissue is characterized by the separation of the cells by nonliving material, which is called extracellular matrix. Bone and blood are connective tissues.Muscle tissue - Muscle cells are the contractile tissue of the body. Its function is to produce force and cause motion, either locomotion or movement within internal organs. Muscle tissue is separated into three distinct categories: visceral or smooth muscle, which is found in the inner linings of organs; skeletal muscle, which is found attached to bone in order for mobility to take place; and cardiac muscle which is found in the heart.Nervous tissue - Cells forming the brain, spinal cord and peripheral nervous system.
Neurotransmitter that triggers muscle contraction?
Acetylcholine (ah-Seh-til-KO-leen) is the organic molecule that triggers muscle contractions in humans. Acetylcholine acts on both the central nervous system (CNS) and on the peripheral nervous system (PNS). It is also the principal neurotransmitter in autonomic ganglia.
The impulse that triggers a contraction travels deep into a muscle fiber by means of what?
transverse tubules
What happens to a muscle when an electrical impulse from a nerve stops?
yes
Where does the nerve impulse travel from the reflex arc?
The nerve impulse travels through the reflex arc. It travels from the sensor through the sensory neurone, through the spinal cord and motor neurone to the effector muscle.
What is the relationship between a stimulus and a reponse?
The stimulus is your bodies reaction to something, say you burnt your hand, this is the stimulus. The reaction is your bodies response to it. In this sense the stimulus will be sensed by sensory neurones which pass an electrical impulse through relay neurons until the impulse gets to the Central Nervous System. This then, gives out another impulse which travels down a Motor Neuron to the muscle telling your hand to be removed from the surface.....
Where in the heart do electric impulses begin?
In a normal heart, the electrical impulse resulting in depolarization and contraction of the cardiac muscle originates in the sinoatrial (SA) node and propagates through the atria to the atrioventricular (AV) node before moving on to the ventricles. When the electrical impulse for muscle contraction is generated, it travels throughout the muscle of each atrium, causing atrial contraction. the impulse then travels to the atrioventricular (AV) node. according to Medical Assisting- administrative and clinical procedures with anatomy and physiology.
What Chemical enters a muscle cell upon excitation?
Acetylcholine is the chemical that crosses the synapse causing a muscle to contract. It is released due to an electrical impulse sent from your brain down your nervous system.
What is an example of integration by the nervous system?
Example: when you step on a nail, your body perceives a stimulus (change in external or internal environment) receptor is the specific thing identifying stimulus, in this case, the skin, then a nervous impulse is generated and is transmitted through a chain of neurons towards central nervous system, sent to the brain where the impulse is interpreted (integration) by the brain, brain will send off new impulse via motor neurons through spinal cord through nerve to muscle to carry out response.
Macroscopic neurology - trace impulse macroscopically through the nerveous system from the brain to the muscle?
Brain send the message via nerve impulses involving neurons which use the neuro-transmitter AcetylcholineEach nerve impulse begins in the dendrites of a neuron's. the impulse move rapidly toward the neuron's cell body and then down the axon until it reaches the axon tip.a nerve impulse travels along the neuron in the form of electrical and chemical signals.Acetylcholine- a neurotransmitter released at the neuromuscular junction triggers a muscle action potential, which leads to muscle contraction
What is contraction and relaxation?
Nerve impulse, or electrical signal, travels down the nerve to the terminal to cause the release of the neurotransmitter acetylcholine (ACh).ACh diffuses across the neuromuscular junction and binds to the receptor sites.Stimulation of the receptor sites causes an electrical impulse to form in the muscle membrane. The electrical impulse travels along the muscle membrane and penetrates deep into the muscle through the T-tubular system.The electrical impulse stimulates the sarcoplasmic reticulum to release calcium into the sarcomere (a contractile unit of a mofibril) area.Calcium allows the actin, myosin, and ATP to interact, causing crossbridge formation and muscle contraction. This process continues as long as calcium is available to the actin and myosin.Muscle relaxation occurs when calcium is pumped back into the sarcoplasmic reticulum, away from the actin and myosin. When calcium moves in this way, the actin and myosin cannot interact, and the muscle relaxes.
What sends an impulse to a muscle or gland?
axon
What steps involved in transmitting the impulse from one neuron to another and then to the muscle fiber?
Brain send the message via nerve impulses involving neurons which use the neuro-transmitter AcetylcholineEach nerve impulse begins in the dendrites of a neuron's. the impulse move rapidly toward the neuron's cell body and then down the axon until it reaches the axon tip.a nerve impulse travels along the neuron in the form of electrical and chemical signals.Acetylcholine- a neurotransmitter released at the neuromuscular junction triggers a muscle action potential, which leads to muscle contraction
What must be present for a nerve impulse to begin?
each nerve impulse begins in the dendrites of a neuron's. the impulse move rapidly toward the neuron's cell body and then down the axon until it reaches the axon tip.a nerve impulse travels along the neuron in the form of electrical and chemical signals.Brain send the message via nerve impulses involving neurons which use the neuro-transmitter AcetylcholineAcetylcholine- a neurotransmitter released at the neuromuscular junction triggers a muscle action potential, which leads to muscle contraction.
