GENERAL HISTOLOGY

NERVOUS

NEURONS TYPES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When a sarcomere (muscle) contracts, which type of neurons gives it (the sarcomere) the signal to contract?
A
Sensory
B
Integrating
C
Cheeseburger
D
Motor
Explanation: 

Detailed explanation-1: -Alpha motor neurons (also called lower motor neurons) innervate skeletal muscle and cause the muscle contractions that generate movement.

Detailed explanation-2: -When the nervous system signal reaches the neuromuscular junction a chemical message is released by the motor neuron. The chemical message, a neurotransmitter called acetylcholine, binds to receptors on the outside of the muscle fiber. That starts a chemical reaction within the muscle.

Detailed explanation-3: -The process of muscle contraction begins at the site where a motor neuron’s terminal meets the muscle fiber-called the neuromuscular junction (NMJ). Every skeletal muscle fiber in every skeletal muscle is innervated by a motor neuron at a NMJ.

There is 1 question to complete.