Q11. What is the main function of white blood cells?
A) Carrying oxygen
B) Clotting blood
C) Fighting infections
D) Transporting nutrients
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Correct Answer: C) Fighting infections
Explanation: White blood cells are crucial for the immune system, as they fight infections and other diseases.
Q12. Which part of the human body is affected by asthma?
A) Heart
B) Lungs
C) Liver
D) Kidneys
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Correct Answer: B) Lungs
Explanation: Asthma is a respiratory condition that affects the bronchial tubes in the lungs.
Q13. What type of cells are primarily affected by leukemia?
A) Muscle cells
B) Nerve cells
C) Blood cells
D) Skin cells
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Correct Answer: C) Blood cells
Explanation: Leukemia is a type of cancer that primarily affects the blood and bone marrow, involving white blood cells.
Q14. Which hormone is known as the “stress hormone”?
A) Adrenaline
B) Cortisol
C) Insulin
D) Testosterone
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Correct Answer: B) Cortisol
Explanation: Cortisol is released in response to stress and low blood-glucose concentration.
Q15. What is the function of the amygdala in the brain?
A) Regulating sleep
B) Processing emotions
C) Controlling appetite
D) Balancing fluids
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Correct Answer: B) Processing emotions
Explanation: The amygdala is involved in processing emotions, especially fear and pleasure.
Q16. Which part of the eye is responsible for focusing light on the retina?
A) Iris
B) Cornea
C) Lens
D) Pupil
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Correct Answer: C) Lens
Explanation: The lens of the eye focuses light onto the retina, adjusting focus for near and far vision.
Q17. What is the primary function of the liver?
A) Pumping blood
B) Filtering blood
C) Producing insulin
D) Digesting fats
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Correct Answer: B) Filtering blood
Explanation: The liver filters blood coming from the digestive tract, detoxifies chemicals, and metabolizes drugs.
Q18. Which vitamin is essential for blood clotting?
A) Vitamin A
B) Vitamin B12
C) Vitamin C
D) Vitamin K
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Correct Answer: D) Vitamin K
Explanation: Vitamin K is crucial for producing prothrombin, a protein and clotting factor that is important in blood clotting and bone metabolism.
Q19. What is the term for the loss of bone density?
A) Osteoporosis
B) Arthritis
C) Myopathy
D) Dermatitis
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Correct Answer: A) Osteoporosis
Explanation: Osteoporosis is a condition characterized by a decrease in bone density, increasing the risk of fractures.
Q20. Which part of the human digestive system is primarily responsible for nutrient absorption?
A) Stomach
B) Liver
C) Small intestine
D) Large intestine
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Correct Answer: C) Small intestine
Explanation: The small intestine is the primary site for nutrient absorption into the bloodstream.