Q71. What is the function of the cerebellum in the human brain?
A) To process sensory information
B) To regulate emotions
C) To coordinate voluntary movements
D) To control speech
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Correct Answer: C) To coordinate voluntary movements
Explanation: The cerebellum is responsible for coordinating voluntary movements such as posture, balance, coordination, and speech, resulting in smooth and balanced muscular activity.
Q72. Which hormone is produced by the pancreas and helps lower blood glucose levels?
A) Cortisol
B) Adrenaline
C) Glucagon
D) Insulin
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Correct Answer: D) Insulin
Explanation: Insulin, produced by the pancreas, helps lower blood glucose levels by facilitating the uptake of glucose into cells.
Q73. What is the primary function of the lymphatic system in the human body?
A) To transport oxygen
B) To digest food
C) To circulate blood
D) To transport and filter lymph
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Correct Answer: D) To transport and filter lymph
Explanation: The lymphatic system transports lymph, a fluid containing infection-fighting white blood cells, throughout the body and is essential for immune function and fat absorption.
Q74. Which part of the human body is responsible for the sense of touch?
A) Hair
B) Skin
C) Eyes
D) Ears
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Correct Answer: B) Skin
Explanation: The skin contains various nerve endings that respond to touch, pressure, and temperature, making it the primary sensory organ for touch.
Q75. What is the main function of the prostate gland in males?
A) To produce testosterone
B) To filter blood
C) To produce seminal fluid
D) To regulate urine flow
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Correct Answer: C) To produce seminal fluid
Explanation: The prostate gland produces seminal fluid, which is a component of semen and helps nourish and transport sperm.
Q76. Which vitamin is necessary for the proper development and function of the eyes, skin, and immune system?
A) Vitamin A
B) Vitamin B12
C) Vitamin C
D) Vitamin D
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Correct Answer: A) Vitamin A
Explanation: Vitamin A is essential for the proper functioning of the eyes, skin, and immune system, and plays a critical role in maintaining vision, growth, cellular differentiation, and immune function.
Q77. What is the function of the ventricles in the human heart?
A) To receive blood
B) To pump blood out of the heart
C) To store blood
D) To oxygenate blood
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Correct Answer: B) To pump blood out of the heart
Explanation: The ventricles are the two lower chambers of the heart, and their main function is to pump blood out of the heart to the lungs and other parts of the body.
Q78. Which part of the human body is primarily responsible for the production of sperm?
A) Prostate gland
B) Seminal vesicles
C) Testes
D) Urethra
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Correct Answer: C) Testes
Explanation: The testes are responsible for producing sperm, which are male reproductive cells necessary for sexual reproduction
Q79. What is the primary function of the alveoli in the lungs?
A) To warm the air
B) To transport oxygen to the blood
C) To produce mucus
D) To protect the respiratory tract
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Correct Answer: B) To transport oxygen to the blood
Explanation: The alveoli are tiny air sacs within the lungs where the exchange of oxygen and carbon dioxide takes place. Oxygen from inhaled air diffuses through the walls of the alveoli into the blood, while carbon dioxide diffuses from the blood into the alveoli to be exhaled.
Q80. Which hormone is produced by the adrenal glands and affects metabolism?
A) Adrenaline
B) Cortisol
C) Insulin
D) Thyroxine
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Correct Answer: B) Cortisol
Explanation: Cortisol, produced by the adrenal glands, plays a role in metabolism by helping to regulate blood sugar levels, acting as an anti-inflammatory, and influencing memory formation, among other functions.