Lol there arent any choicess?? hahaha lol
Bone marrow contains blood I think, so it would be considered a donor procedure since you're donating blood.
Da bebe
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Answer:
Heart rate is controlled by the two branches of the autonomic (involuntary) nervous system. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The sympathetic nervous system (SNS) releases the hormones (catecholamines - epinephrine and norepinephrine) to accelerate the heart rate.
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