Chapter 1- Muscularskeletal System

Question 1

Extension

Answer 1

Angle of articulating bone increases

Question 2

Adduction

Answer 2

Movement of a body part towards an imaginary midline

Question 3

Abduction

Answer 3

Movement of a body part away from the imaginary midline

Question 4

Nervous control of muscle contractions

Answer 4

The number of fibres recruited to contract is governed by the strength of the nerve impulses from the brain

When the nerve impulses are strong more motor units are activated, therefore more muscle fibres contract

Question 5

How muscle contractions occur

Answer 5

Sliding filament theory
Myofilaments slide over each other
The actin slides over the myosin
The brain sends a message to the muscles telling them to contract

Question 6

Isotonic

Answer 6

Occurs whenever muscle length changes throughout a range of motion

Question 7

Isometric

Answer 7

Involves little change in muscle length which tension is developed

Question 8

Isokinetic

Answer 8

Maximal tension is developed throughout entire ranges of motion

Question 9

Slow twitch fibres

Answer 9

Red

For aerobic endurance work

Question 10

Fast twitch fibres

Answer 10

White

For high intensity short duration activity

Question 11

Types of movements

Flexion

Answer 11

Angle of articulating bone decreases