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A neutral signal reaching the NM release...

A neutral signal reaching the NM releases a neurotransmitter (acetylcholine) which generates an action potential in

A

Sarcolemma

B

Sarcoplasmic reticulum

C

Sarcoplasm

D

Cross arm

Text Solution

Verified by Experts

The correct Answer is:
A
A neutral signal reaching the NMJ releases a neurotransmitter (acetylcholine) which generates an action potential in sarcolemma.
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The steps involved in the mechanism of muscle contraction are given below. Arrange the steps in proper sequential order and select the correct option. I. Release of calcium ions in the sarcoplasm. II. Signal sent by the CNS via a motor neuron. III. Binding of calcium with a subunit of troponin on actin filaments. IV. Generation of the action potential in the sarcolemma. V. Binding of myosin head to the exposed active sites on actin to form a cross-bridge. VI. Inward pulling of ‘Z’ line attached to actin causing shortening of the sarcomere. VII. Pulling of the attached actin filaments towards the centre of 'A' band. VIII. Release of neurotransmitter acetylcholine and generation of the action potential in the sarcolemma.

Generation of action potential in stage of

Arrange the following events of muscle contraction in the sequence : (i) Generate an action potential in the sarcolemma (ii) Form a cross bridge (iii) Release a neurotransmitter (Acetylcholine) (iv) Release of calcium ions in sarcoplasm (v) Pulls the attached actin filaments towards the centre of "A" band (vi) Remove the masking of active sites for myosin The correct option is :-

Which of the following generates the action potential in the heart ?

The binding of the neurotransmitter with the receptors opens ion channels allowing the entry to ions which can generate a new potential in the

Action potential is generated by

Following is given a randomly arranged list of events that occur at neuromuscluar junction to trigger mucle contraction. (i) Receptor sites on sarcolemma Nerve impulse (iii) Release of Ca^(+2) from sarcoplasmic reticulum (iv) The neurotransmitter acetylcholine is released (v) Sarcomere shorten (vi) Synaptic cleft (vii) Spread of impulses over sarcolemmna on T-tubules Which of the following gives the correct sequence of these steps?

Which of the following statements given below are true with reference to muscle contraction. I. Neurotransmitter acetycholine is released as nerve impulse reaches the end of axon and binds to receptor sites of motor end plate. II. Action potential passes from motor end plate over sarcoplasmic and then into the T-tubules and sarcoplasmic reticulum. III. Calcium ion are released into the sarcoplasm bind to troponin, causing a change in its shape and position. IV. Myosin cross bridges are able to bind to exposed active sites of actin. Choose the correct option.

At the stage of generation of action potential, the axolemma is :

A2Z-LOCOMOTION AND MOVEMENT-Section A: Topicwise Questions Topic 3 : Mechanism Of Muscle Contraction
  1. Read the following statements and find out the incorrect statement(s).

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  2. The junction between a motor neuron and the sarcolemma of the muscle f...

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  3. A neutral signal reaching the NM releases a neurotransmitter (acetylch...

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  4. During muscular contraction, the myosin head binds to the exposed acti...

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  5. In which of the following steps of muscle contraction energy is utilis...

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  6. In the given figure how many sarcomeres are seen?

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  7. Read the following statements and find out the incorrect statement.

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  8. Statements: 1. A bands are dark and contain myosin.  I-bands are ligh...

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  9. During contraction of muscles Ca^(2+) attaches to

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  10. Substance that accumulates in a fatigued muscle is

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  11. Muscle band that remains unchanged during contraction and relaxation o...

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  12. Match the following and mark the correct option {:("Column I", " ""C...

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  13. ATPase enzyme needed for muscle contraction is located in " ...

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  14. The functional unit of contractile system in a striated muscle is

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  15. Which one is a bone of forelimb?

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  16. Red muscles fibres are rich in

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  17. The reactions which change lactic acid into glycogen

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  18. Sliding filament theory of muscle contraction was given by

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  19. Which is true of muscle contraction?

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  20. During muscle contraction

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