Consider statements about human anatomy: 1. The biceps is a muscle in the arm. 2. The quadriceps is a muscle in the thigh. 3. The diaphragm separates the thorax and abdomen. Which are correct? MCQ with Answer and Explanation
Consider statements about human anatomy: 1. The biceps is a muscle in the arm. 2. The quadriceps is a muscle in the thigh. 3. The diaphragm separates the thorax and abdomen. Which are correct?
A. 2 and 3 only
B. 1 and 2 only
C. 1 and 3 only
D. 1, 2 and 3
Answer: Option D
Solution (By JKSSB Mock Tests)
The biceps brachii is a two-headed muscle located in the upper arm, responsible for flexing the elbow. The quadriceps femoris is a large, four-headed muscle group in the front of the thigh, extending the knee. The diaphragm is a dome-shaped skeletal muscle that forms the floor of the thoracic cavity and the roof of the abdominal cavity, crucial for breathing. All statements are correct.
Explanation:
The vocal cords (folds) in the larynx vibrate as air passes, producing sound. Pitch is controlled by tension. Epiglottis prevents food entry, trachea is airway.
Explanation:
Calcitonin is produced by the parafollicular (C) cells of the thyroid gland. It lowers blood calcium levels by inhibiting osteoclast activity and promoting calcium deposition in bones. Parathyroid hormone (from parathyroid glands) raises calcium. Adrenal and pituitary glands have other functions.
Explanation:
Tuberculosis is an infectious disease caused by Mycobacterium tuberculosis, spreading through airborne droplets. Cancer, diabetes, and hypertension are non-communicable.
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