Question

Drag each tile to the appropriate bin to indicate whether it shows the neuromuscular junction at rest or active (in the process of transmitting a signal).

Answer 1

Answer:

Neuromuscular Junction  - It is a chemical synapse formed by the contact between a motor neuron and a muscle fiber.

Function- As the motor neuron are able to transmit the required signals to the muscle fiber, which causes the muscle contraction.

Explanation:

Steps in neuromuscular transmission:

• nerve action potential.

• calcium entry into the presynaptic terminus.

• release of Ach quanta.

• diffusion of Ach across cleft.

• combination of Ach with post-synaptic receptors and Ach breakdown via  esterase.

• opening of Na +  /K +  channels (cation channels).

• postsynaptic membrane depolarization (EPP).

• muscle action potential.