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1. Which of the following hormones is responsible for regulating calcium levels
in the blood?
a) Insulin
b) Thyroid stimulating hormone (TSH)
c) Parathyroid hormone (PTH)
d) Adrenaline
Answer: c) Parathyroid hormone (PTH)
Rationale: PTH is released by the parathyroid gland and helps to regulate
calcium levels in the blood by increasing the absorption of calcium from the
intestines and kidneys, as well as releasing calcium from bone.
2. Which of the following structures carries oxygenated blood from the lungs to
the heart?
a) Pulmonary artery
b) Aorta
c) Pulmonary vein
d) Renal vein
Answer: c) Pulmonary vein
Rationale: The pulmonary vein carries oxygenated blood from the lungs back
to the heart, specifically the left atrium.
3. Which of the following is NOT a function of the liver?
a) Detoxification of harmful substances
b) Production of bile
c) Storage of glycogen
d) Regulation of blood glucose levels
Answer: d) Regulation of blood glucose levels
Rationale: The pancreas is responsible for regulating blood glucose levels
through the release of insulin and glucagon, not the liver.
4. Which of the following is the primary function of red blood cells?
a) Transport of oxygen
b) Regulate blood pressure
c) Fight infection
d) Store nutrients
Answer: a) Transport of oxygen
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