Answer:
Calcitonin stimulates the kidneys to absorb calcium when calcium levels are too low, while parathyroid hormone stimulates the kidneys to excrete calcium when calcium levels are too high.
Explanation:
Answer:
All cells essentially originate from a single fertilized egg.
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Answer:
b. carb (sugars)
Explanation:
plants make glucose through photosynthesis
The cardiovascular system has three main functions:
transport of oxygen, carbon dioxide and nutrients.
clotting of open wounds.
regulation of body temperature.