Part 3

Question 1

When exercising regularly, it strengthens the muscle and allow muscles to..

Answer 1

use energy more efficiently

Question 2

What is hypertrophy?

Answer 2

when muscle mass increase from exercise

Question 3

Muscles fibres can increase in size but cannot in..

Answer 3

increase in amount. We cannot make more muscle fibres

Question 4

In an athlete muscles, the enzymes are more active and numerous and there are more in the..

Answer 4

mitochondria

Question 5

A muscle twitch occurs when a nerve stimulates several muscle cells. There are 3 phases of Muscle twitch / contraction..

Answer 5

Latent: time between the impulse and muscle contraction

Contraction: when muscle shorten

Relaxation: when muscle return to original length

The stimulation of a muscle fibre is an all or none contraction ( either it happens or it doesn’t )

Question 6

If a muscle is given a repeated stimuli without completely relaxing, this is..

Answer 6

Summation.

Example : Someone doing pushups

Question 7

in Summation, the actin and myosin overlap causing an in..

Answer 7

increase and greater muscle shortening.

The shortening that remains in the first muscle twitch and the shortening produced in the second causes a great force of contraction.

Question 8

What is tetanus?

Answer 8

Tetanus occurs when the muscle can not relax due to repeated muscle stimulations

Example: doing a pull up and holding it to see how long they can hold on for

Question 9

Type I slow muscle fibre twitch rely on what respiration?

Answer 9

Aerobic respiration (with oxygen)

Question 10

Type II fast muscle fibre twitch rely on what respiration?

Answer 10

Anaerobic Respiration (without oxygen)

Question 11

Although each individual is born with a different amount of Type I and Type II muscle fibres, one can change it shape fit for certain activities.

Low intensity and long duration training increases the number of mitochondria and blood vessels feeding these fibres which affects..

Answer 11

slow muscle fibres (type I) and is good for long duration activities. Increase endurance (more energy)

Question 12

Although each individual is born with a different amount of Type I and Type II muscle fibres, one can change it shape fit for certain activities.

A high intensity, short duration training increases strength and bulges muscles which affects..

Answer 12

fast muscle fibres (type II) and is good for short duration activities like a short distance race. Does not increase endurance. Makes you more fatigue easily

Question 13

What is atrophy?

Answer 13

Atrophy is when the muscles shorten and decrease in size due to lack of use