Acute responses to muscular system

Question 1

Increased motor unit and muscle fibre recruitment

Answer 1

increase in motor unit recruitment must occur so that more muscle fibres are activated to contract.

Question 2

Increased arteriovenous oxygen difference

Answer 2

During exercise, working muscles extract much more of the available oxygen from the blood, via myoglobin and mitochondria.

Question 3

Increased muscle temperature

Answer 3

Increased blood flow to the muscles, coupled with the heat generated as a by-product of the increased production of ATP during exercise, results in an increase in muscle temperature.