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.
The enzyme responsible for facilitating hydrogen bonding between nucleotides in a new DNA molecule is Polymerase.
<span>Your skeleton is internal, which means it is contained inside of you. A grasshopper has an external skeleton, or exoskeleton, with everything contained inside it. </span>
Explanation:
respiration because it's about blood circulation
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