Calcium and Hormone Regulation Quiz

What is calcium needed for in the body?

• Only for bones

• Muscle contraction, nerve signaling, blood clotting, and bone health

• Producing red blood cells

• Regulating oxygen levels

What hormone is released when blood calcium levels drop below normal?

• Calcitonin

• Parathyroid Hormone (PTH)

• Insulin

• Melatonin

Where is the parathyroid gland located?

• In the brain

• Behind the thyroid gland

• Near the liver

• In the kidneys

What does calcitonin do when calcium levels are too high?

• Stimulates osteoblasts to break down bone

• Increases calcium absorption in the intestines

• Inhibits osteoclasts and increases calcium excretion

• Activates vitamin D production

How does parathyroid hormone (PTH) affect blood calcium levels?

• Decreases calcium in the blood

• Increases calcium by stimulating osteoclasts, kidneys, and intestines

• Causes calcium to be stored in bones

• Has no effect on calcium levels

Which organ absorbs calcium from food with the help of vitamin D?

• Liver

• Small intestine

• Kidneys

• Pancreas

What is hypocalcemia?

• High blood calcium levels

• Low blood calcium levels

• An excess of vitamin D

• A disease of the kidneys

What is hypercalcemia?

• High blood calcium levels

• Low blood calcium levels

• A condition caused by a lack of vitamin D

• A condition that weakens bones due to low calcium

What do osteoclasts do in calcium regulation?

• Build bone by depositing calcium

• Break down bone and release calcium into the blood

• Absorb calcium from the intestines

• Increase calcium excretion in the kidneys

How do the kidneys help regulate calcium levels?

• They reabsorb calcium when levels are low and excrete it when levels are high

• They store extra calcium in the blood

• They prevent the intestines from absorbing calcium

• They make calcium from vitamin D