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NEET MDS Quiz - Practice Test
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physiology - 3 Questions

1
Physiology

What is the primary function of the sympathetic nervous system during the fight-or-flight response?
1) Facilitation of digestive processes
2) Diverting blood flow to the gastrointestinal tract
3) Preparing the body for rest and digestion
4) Mobilizing energy and preparing the body for immediate action

📝 Explanation:

Answer: 4) Mobilizing energy and preparing the body for immediate action
Explanation: The sympathetic nervous system is activated during the fight-or-flight response to mobilize energy and prepare the body for immediate action. It does this by increasing heart rate, dilating pupils, and diverting blood flow to muscles and the brain, among other effects.

2
Physiology

The regulation of sodium reabsorption in the kidney tubules involves which of the following?
1) Tubulo-glomerular feedback
2) Glomerulo-tubular feedback
3) Both A and B
4) Neither A nor B

📝 Explanation:

Tubulo-glomerular feedback (TGF) and glomerulo-tubular feedback (GTF) are both important in regulating sodium reabsorption in the kidney tubules. TGF involves the macula densa sensing the sodium chloride concentration in the tubular fluid and adjusting the glomerular filtration rate accordingly, while GTF is the adjustment of tubular sodium reabsorption in response to changes in glomerular filtration rate.

3
Physiology

What are the main stimuli that increase the secretion of growth hormone (GH)?
1) High blood glucose levels and physical inactivity
2) Hypoglycemia, exercise, protein meals, and stress
3) REM sleep and increased IGF-1 levels
4) High cortisol and fatty acid levels

📝 Explanation:

Answer: 2) Main stimuli that increase GH secretion include hypoglycemia, exercise, protein meals, and stress.

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