Asked by Nathan Fry

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

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