Q51. What is the main function of the frontal lobe of the brain?
A) To process visual information
B) To control voluntary movement
C) To regulate balance
D) To handle auditory perception
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Correct Answer: B) To control voluntary movement
Explanation: The frontal lobe is located at the front of each cerebral hemisphere and is involved in voluntary movement, reasoning, planning, parts of speech, movement, emotions, and problem-solving.
Q52. Which hormone helps to regulate the amount of glucose in the blood?
A) Insulin
B) Adrenaline
C) Cortisol
D) Glucagon
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Correct Answer: A) Insulin
Explanation: Insulin helps to regulate the amount of glucose in the blood by allowing cells to take in glucose to be used for energy or stored.
Q53. What is the function of the mitral valve in the human heart?
A) To prevent backflow into the right ventricle
B) To prevent backflow into the left atrium
C) To regulate blood flow from the heart to the lungs
D) To regulate blood flow from the lungs to the heart
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Correct Answer: B) To prevent backflow into the left atrium
Explanation: The mitral valve, located between the left atrium and left ventricle, prevents the backflow of blood into the left atrium when the left ventricle contracts.
Q54. Which part of the human body is primarily responsible for the production of hormones that regulate other endocrine glands?
A) Thyroid gland
B) Adrenal gland
C) Pineal gland
D) Pituitary gland
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Correct Answer: D) Pituitary gland
Explanation: The pituitary gland, often referred to as the “master gland,” produces hormones that regulate other endocrine glands.
Q55. What is the primary function of the semicircular canals in the inner ear?
A) To produce earwax
B) To detect sound
C) To maintain balance
D) To regulate pressure
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Correct Answer: C) To maintain balance
Explanation: The semicircular canals in the inner ear are part of the vestibular system and help maintain balance by detecting rotations of the head.
Q56. Which part of the human body is affected by anemia?
A) Lungs
B) Brain
C) Blood
D) Liver
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Correct Answer: C) Blood
Explanation: Anemia is a condition in which you lack enough healthy red blood cells to carry adequate oxygen to your body’s tissues, affecting the blood’s ability to function properly.
Q57. What is the function of bile in the digestive system?
A) To break down proteins
B) To break down carbohydrates
C) To break down fats
D) To absorb vitamins
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Correct Answer: C) To break down fats
Explanation: Bile, produced by the liver and stored in the gallbladder, helps break down fats into fatty acids, which can be taken into the body by the digestive tract.
Q58. Which part of the human body is responsible for the sense of smell?
A) Tongue
B) Skin
C) Eyes
D) Nose
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Correct Answer: D) Nose
Explanation: The nose is responsible for the sense of smell. The olfactory receptors located in the nasal cavity send signals to the brain, allowing us to detect and differentiate odors.
Q59. What is the main function of the tendons in the human body?
A) To connect muscles to bones
B) To connect bones to bones
C) To cushion joints
D) To protect organs
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Correct Answer: A) To connect muscles to bones
Explanation: Tendons are tough bands of fibrous connective tissue that usually connect muscle to bone and are capable of withstanding tension, facilitating movement by transmitting the force of muscle contraction to the bones.
Q60. Which vitamin is crucial for the coagulation of blood?
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 essential for the formation of clotting factors, which are necessary for blood coagulation and preventing excessive bleeding.