Muscular system

Question 1

Functions of the muscular system

Answer 1

1. PRODUCE MOVEMENT- Skeletal muscles which are consciously controlled (voluntary) are attached to bones
2. MAINTAIN ESSENTIAL BODILY FUNCTIONS- Those muscles which we have little or no conscious control over are regarded as involuntary muscles. These muscles are responsible for maintaining the body’s ongoing needs.
3. MAINTAIN POSTURE- Keeping body upright pulling against gravity.
4. STABILISE JOINTS- Skeletal muscles serve to stabilise the joints of the skeleton.
5. GENERATE HEAT- Heat is a by-product of muscular activity. critical in maintaining normal body temperature

Question 2

All-or-none principle

Answer 2

states that all the muscle fibres in a motor unit will either contract with 100% force or not at all.

Question 3

3 types of muscles in the body

Answer 3

Smooth muscles
Cardiac muscles
Skeletal muscles

Question 4

Smooth muscles

Answer 4

Located in the walls of hollow internal structures such as blood vessels, the stomach, intestines, and urinary bladder. Smooth muscle fibers are involuntary

Question 5

Cardiac muscle

Answer 5

Is the muscle of the heart. Like skeletal muscle tissue, it is striated and can contract rapidly involuntary and fatigue resistant

Question 6

Skeletal muscle

Answer 6

Skeletal muscle tissue is named for its location - attached to bones by bundles of collagen fibres known as tendons. Skeletal muscle links 2 bones across its connecting joint. Skeletal Muscles are Voluntary.