Description of neurotransmitter of neuromuscular junction
Give a brief description of neurotransmitter of neuromuscular junction? How does nervous system trigger the muscle contraction?
Expert
Nervous cells which trigger muscle contraction are motor neurons. Neurotransmitter of motor neurons is acetylcholine. When a motor neuron is stimulated depolarizing current flows along the membrane of its axon till reaching the synapse at neuromuscular junction (neural impulse passage zone between axon extremity and sarcolemma). Near the axonal extremity depolarization permits entrance of calcium ions in the axon (note that calcium also has a relevant function here). The calcium ions excite the neuron to liberate acetylcholine in synapse.
Acetylcholine then binds to special receptors into outer surface of sarcolemma, permeability of this membrane is changed and an action potential is created. The depolarization is then conduced along sarcolemma to sarcoplasmic reticulum that thus liberates calcium ions for sarcomere contraction.
Name the two groups of defending techniques of the Human body in opposition to harmful or foreign agents? Distinguish between them?
Specify the histological nature of glands? Explain how are they formed?
Database Design: This comprises logical (that is, entity relationship) and physical (that is, table, column and key) design tools for the data. Physical data modeling is becoming approximately mandatory for applications employing rela
Human behavior is need motivated. A person joins any organization basically to satisfy his varying needs. He faces a conflict within himself when he perceives that organization is not satisfying his needs in accordance with his perceived standards, in the words of Keith Davis,
SMART–define the principal and outcome then set the objectives in terms of SMART usage–business or personal objectives will suffice.
Write down the mechanisms of hemorrhage contention?
Illustrate that the plant transpiration increase or lower whenever air humidity is high?
Define cytoskeleton and its constituents: Cytoskeleton is the cytoplasmic structure which supports cell, keeps its shape and fixates and moves cell organelles. This is made up of an extensive network of fibers dispersed in the cytoplasm and attached i
Write down the differentiation between temporal summation and spatial summation of the muscle fibers? Give a brief description of tetany?
Explain the formation of the male gametophytes and the male gametes inside the angiosperms?
18,76,764
1938468 Asked
3,689
Active Tutors
1454320
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!