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Human Physiology — GK Questions with Answers

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7 questions
  1. Which disease comes from a vitamin D deficiency?
    1. Scurvy
    2. Rickets
    3. Beriberi
    4. Night blindness
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    Answer: (B) Rickets

    A shortage of vitamin D causes a calcium deficiency in bones, leading to rickets (in children) and osteomalacia (in adults).

  2. Which organ secretes pepsin?
    1. Mouth
    2. Stomach
    3. Pancreas
    4. Small intestine
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    Answer: (B) Stomach

    Pepsin is secreted by the stomach’s gastric glands, and it breaks protein down into peptone.

  3. What kind of blood does the right atrium of the heart receive?
    1. Oxygen-rich
    2. Carbon dioxide-rich
    3. A mix of both
    4. Pure plasma
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    Answer: (B) Carbon dioxide-rich

    The right atrium receives carbon dioxide-rich blood from the rest of the body, which later gets purified in the lungs.

  4. What is ADH’s main job?
    1. Raising blood sugar
    2. Concentrating urine to conserve water
    3. Building bone
    4. Speeding up digestion
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    Answer: (B) Concentrating urine to conserve water

    ADH (antidiuretic hormone) helps the kidney concentrate urine, conserving water for the body.

  5. Which bones belong to the axial skeleton?
    1. Arms and legs
    2. Skull, spine and ribs
    3. The shoulder girdle
    4. Fingers
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    Answer: (B) Skull, spine and ribs

    The skull, vertebral column, ribs and sternum belong to the axial skeleton, while arms and legs belong to the appendicular skeleton.

  6. A shortage of which chemical causes Parkinson’s disease?
    1. Acetylcholine
    2. Dopamine
    3. Insulin
    4. Adrenaline
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    Answer: (B) Dopamine

    Parkinson’s disease comes from the death of dopamine-producing neurons, which affects voluntary movement.

  7. Which gland is called the "master gland"?
    1. Thyroid
    2. Pituitary gland
    3. Pancreas
    4. Adrenal gland
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    Answer: (B) Pituitary gland

    The pituitary gland controls several other glands, which is exactly why it is called the "master gland".

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