Resistance exercise 3

Question 1

Is muscle fibre hyperplasia the cause of muscle hypertrophy?

Answer 1

NO

Question 2

What factor other than muscle size can influence how much force a muscle will produce?

Answer 2

Neural factors–> how much of the action potentials are actually getting to the muscle to cause it to contract

Question 3

What does each motor neuron axon join up with?

Answer 3

Muscle fibres

Question 4

How many muscle fibres per axon?

Answer 4

multiple

Question 5

How many axons per muscle fibre?

Answer 5

1

Question 6

What makes up a motor unit?

Answer 6

The spinal cord, the motor neuron axon and the muscle fibres

Question 7

How is motor unit size measured?

Answer 7

Fibres per unit

Question 8

How many fibres per motor unit are there in the eye?

Answer 8

10 bc fine motor control is needed

Question 9

How many fibres per motor unit are there in the hand?

Answer 9

300

Question 10

How many fibres per motor unit are there in the gastrocnemius?

Answer 10

2000

Question 11

What needs to happen for neuromuscular co-ordinaiton?

Answer 11

Agonist muscle must be maximally switched on at the right time, Support from appropriate synergistic ans stabiliser muscles, opposed by minimal antagonist activation

Question 12

What can be increased regarding the motor unit to generate more force?

Answer 12

Motor unit firing frequency

Question 13

How does resistance exercise affect motor units positively?

Answer 13

It allows us to increase firing frequency

Question 14

Two types of motor units?

Answer 14

Type 1 and type 2

Question 15

Type 1 motor unit?

Answer 15

Smaller, easier to switch on, less force

Question 16

Type 2 motor unit?

Answer 16

Larger, harder to switch on, more force

Question 17

What do type 2 fibres need to happen before they are recruited?

Answer 17

Type 1 fibres to be recruited, and a higher threshold of excitation than type 1

Question 18

Use of type 1 fibres?

Answer 18

Lifting something light, clicking a button etc

Question 19

How does resistance training positively impact the recruitment of motor units?

Answer 19

Reduces the electrical excitatory threshold required to switch on the type II motor units

Question 20

What kind of runners have a higher proportion of type 1 muscle fibres?

Answer 20

Distance runners

Question 21

Does weight load have an effect on muscle growth?

Answer 21

Sort of (maybe higher load better) but not 100% sure

Question 22

What effect does exercise have on anabolic hormomes?

Answer 22

It increases the concentration of them

Question 23

Examples of anabolic hormones?

Answer 23

insulin, growth hormone, testosterone

Question 24

What happens to strength as a result of blocking testosterone?

Answer 24

Loss in strength

Question 25

Why does leg press increase concentration of anabolic hormomes?

Answer 25

The muscles surrounding the gonads will spike testosterone and anabolic hormones if exercised