Unit - 1.2 - The Muscular System

Question 1

Contractibility

Answer 1

The ability of a muscle to forcefully shorten

Question 2

Extensibility

Answer 2

The ability of a muscle to be stretched

Question 3

Elasticity

Answer 3

The ability of muscle fibres to contract and return to their original state

Question 4

Atrophy

Answer 4

Loss of muscle tissue

Question 5

Hypertrophy

Answer 5

Enlargement of muscle tissue

Question 7

What are smooth muscles?

Answer 7

Smooth muscles are in the walls of blood vessels, stomach and intestines. These muscles help with digestion and getting rid of body toxins. They work involuntarily and are not striated.

Question 8

What are cardiac muscles?

Answer 8

Cardiac muscle are the thick middle layer of the heart and are responsible for pumping blood to the rest of the body. They work involuntarily.

Question 9

What are skeletal muscles?

Answer 9

Skeletal muscles are found throughout the body and are attached to bones through tendons. These muscles help with movement sustaining body posture, and maintaining body temperature. They are the only type of muscle that works voluntarily.