What's the work of Neuro muscular junction and how is work?
Answers
Answer:
A neuromuscular junction (or myoneural junction) is a chemical synapse between a motor neuron and a muscle fiber. It allow the motor neuron to transmit a signal to the muscle fiber, causing muscle contraction. Muscles require innervation to function—and even just to maintain muscle tone, avoiding atrophy.
Hope u like it my ans Dost plz mark as brainlist dear ☺❤
Answer:
A neuromuscular junction (or myoneural junction) is a chemical synapse between a motor neuron and a muscle fiber. It allow the motor neuron to transmit a signal to the muscle fiber, causing muscle contraction. Muscles require innervation to function—and even just to maintain muscle tone, avoiding atrophy.
Explanation:
WORKING PROCESS .
Each branch of a motoneuron
forms a single junction with a
muscle fiber. The myelin sheath
surrounding the motor axon ends
near the surface of the muscle
fiber and the axon divides into a
number of short processes that
lie embedded in grooves on the
muscle-fiber surface. This
region of the sarcolemma
(muscle membrane) is known as
the motor end plate.
Acetylcholine is the
neurotransmitter in these
synapses. End-plate potentials
(EPPs) can be recorded at the
motor end plate when the
presynaptic membrane is
activated to release vesicles containing the acetylcholine.
Steps :
Steps in neuromuscular transmission:
1) nerve action potential.
2) calcium entry into the presynaptic terminus.
3) release of Ach quanta.
4) diffusion of Ach across cleft.
5) combination of Ach with post-synaptic receptors and Ach breakdown via
esterase.
6) opening of Na+
/K+
channels (cation channels).
7) postsynaptic membrane depolarization (EPP).
8) muscle action potential.