Musculoskeletal System - Physiology 16th Nov 2016 (Part 1)

Question 1

What is the poison that blocks the release of acetylcholine from nerve terminals ?

Accepted Answer

botulinum toxin

Question 2

When muscles with its myofilaments touching both Z disks, very little contractions occur.

Accepted Answer

True

Question 3

Shortening of sarcomere length without change in myofilament length is based on what theory ?

Accepted Answer

sliding filament

Question 4

During contraction of skeletal muscles, length of ______ shorten.

Accepted Answer

sarcomeres

Question 5

An area where there is no overlap between actin and myosin is called ______ .

Accepted Answer

Zone H

Question 6

A neuromuscular junction is both excitatory and inhibitory.

Accepted Answer

False

Question 7

Muscle relaxation occurs due to transport of ____ back into the sarcoplasmic reticulum.

Accepted Answer

Ca2+

Question 8

The oxygen binding protein that is present in muscle fibres are called

Accepted Answer

myoglobin

Question 9

Neurotransmitter at the neuromuscular junction is ___

Accepted Answer

acetylcholine

Question 10

When a stretched muscle is stimulated, it produces very little active tension.

Accepted Answer

True

Question 11

The process of the increase in the number of active motor units is called _____

Accepted Answer

recruitment of motor units

Question 12

What is the structural/functional unit of a skeletal muscle known as?

Accepted Answer

Sarcomere

Questions 12