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.
What do you mean by the neurotransmitter of neuromuscular junction? Explain, how the nervous system triggers the muscle contraction?
Write down the forces which are accountable for antigen-antibody reactions.
1. The world economy has become more global as nation states have become more tightly integrated. The potential business opportunities have increased commensurately. a) Describe and examine the shifts in the world economy over the last 30 years.
Give a brief explanation of genetic code.
What are the basic differences among vertebrates and the other chordates?
Write down the main events of third mitotic period.
Give a brief explanation of the term enzymes? And also write down the significance of enzymes for human beings?
Explain the embryonic sac? Specify the cells which form the embryonic sac? Specify their ploidies?
Write down some diseases caused by the abnormal GH secretion by hypophysis?
Name the substance from which microfilaments are made up of? Explain the properties of such elements which give motility to cells?
18,76,764
1947847 Asked
3,689
Active Tutors
1461639
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!