What responses in body systems will occur to increase the oxygen received by muscle tissue when a man runs a marathon race?

Question

Responses

The endocrine system releases stress hormones, decreasing heart rate and rate of digestion
The endocrine system releases stress hormones, decreasing heart rate and rate of digestion,

The muscular system is nourished by the release of calcium from the skeletal system
The muscular system is nourished by the release of calcium from the skeletal system,

Respiration rates increase and heart rate increases, circulating blood at a faster pace
Respiration rates increase and heart rate increases, circulating blood at a faster pace,

The nervous system increases the rate of neurotransmissions to decrease muscle movement

Answer 1

and increase blood flow to muscle tissue
The nervous system increases the rate of neurotransmissions to decrease muscle movement and increase blood flow to muscle tissue,

Blood vessels dilate to allow for increased blood flow to muscle tissue
Blood vessels dilate to allow for increased blood flow to muscle tissue,

The respiratory system increases oxygen intake by deepening breaths and increasing lung capacity
The respiratory system increases oxygen intake by deepening breaths and increasing lung capacity.