Muscle Physiology CONT

Question 1

What does isometric contraction mean ?

Answer 1

The length remains the same but there is a change in tone

Question 2

What does Isotonic contraction mean ?

Answer 2

Tone remains the same but there is a change in length

Question 3

What are the two types of contraction?

Answer 3

• Isotonic
• Isometric

Question 4

What are the two types of skeletal muscle fibres ?

Answer 4

Type 1 - Slow twitch

Type 2 (2A, AND 2B) - Fast twitch

Question 5

If you were a marathon runner what type of muscle fibres would you have ?

Answer 5

Type 1 - Slow twitch

Question 6

If you were a sprinter what type of muscle fibres would you have ?

Answer 6

Type 2 - Fast twitch

Question 7

What type of muscle fibres fatigue rapidly, type 1 or type 2 ?

Answer 7

Type 2 fatigues quicker (spinter twitch fibres)

Question 8

In the first 10-15 seconds of exercise, what do our muscles rely on for energy?

Answer 8

• Stored ATP and creatine phosphate

Question 9

What do our muscles rely on for energy in the short-term energy period (15 seconds to 2-3 minutes) of exercise?

Answer 9

Anaerobic metabolism of glucose

Question 10

What do our muscles rely on for energy in the long-term energy (2-3 minutes and beyond) of exercise?

Answer 10

Aerobic metabolism using glucose and fatty acids.

Lungs and heart have adapted by this point.