Approximately How Many Times Does an Average Human Heart Beat

question 49

Multiple Choice

Approximately how many times does an average human heart beat in a year?

• A) 4 ×
• B) 4 ×
• C) 4 ×
• D) 4 ×
• E) 4 ×

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Definitions:

Calcitonin

A hormone secreted by the thyroid gland that helps regulate calcium levels in the blood.

Blood Calcium

The level of calcium ions in the bloodstream, critical for various bodily functions including bone health, nerve transmission, and muscle function.

Neuroendocrine Cells

Cells that receive neuronal input and as a response, release message molecules (hormones) into the blood, functioning both as neurons and endocrine cells.

Oxytocin

Oxytocin is a hormone and neurotransmitter involved in childbirth, lactation, and the regulation of social bonding and trust.