Govt. Exams
Entrance Exams
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Topics in NEET Zoology
The resting membrane potential of a typical neuron is approximately:
Correct Answer:
B. -70 mV
EXPLANATION
The resting potential is maintained at -70 mV primarily by the Na+/K+ ATPase pump and differential ion permeability.
Which blood cells are responsible for producing antibodies?
Correct Answer:
B. Plasma cells
EXPLANATION
Plasma cells (differentiated B lymphocytes) produce and secrete specific antibodies in response to antigens.
In the small intestine, the majority of nutrient absorption occurs in the:
Correct Answer:
B. Jejunum
EXPLANATION
The jejunum is the primary site for nutrient absorption due to its extensive villi and optimal length for absorption process.
The normal pH of blood is maintained primarily by:
Correct Answer:
D. All of the above
EXPLANATION
Blood pH (7.35-7.45) is maintained by multiple buffer systems including bicarbonate, phosphate, and protein buffers working together.
Which of the following hormones is NOT produced by the anterior pituitary?
Correct Answer:
C. ADH
EXPLANATION
ADH (Antidiuretic hormone) is produced by the hypothalamus and stored/released by the posterior pituitary, not the anterior pituitary.
A patient has difficulty in accommodation of the eye. Which lens condition is responsible?
Correct Answer:
A. Loss of elasticity of the lens
EXPLANATION
Presbyopia occurs due to loss of lens elasticity with age, reducing accommodation ability for near vision.
