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NEET MDS Quiz - Practice Test
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Physiology - 3 Questions

1
Physiology

What is the effect of oxytocin on the myoepithelial cells of the mammary gland?
1) Contraction to facilitate milk ejection
2) Relaxation to facilitate milk secretion
3) Increase in cellular metabolism
4) Growth and proliferation of myoepithelial cells
E. Inhibition of milk secretion

📝 Explanation:

Oxytocin causes contraction of the myoepithelial cells surrounding the mammary alveoli, which presses milk into the larger ducts and leads to the milk let-down reflex. This is essential for milk ejection during lactation.

2
Physiology

What is the mechanism by which glucose is reabsorbed in the proximal tubules of the kidney?
1) Passive diffusion
2) Facilitated diffusion
3) Active transport
4) Osmosis

📝 Explanation:

Glucose is reabsorbed in the proximal tubules of the kidney primarily through active transport mechanisms, utilizing sodium-glucose transporters.

3
Physiology

Which of the following statements about glomerular filtrate is true?
1) It contains high levels of proteins.
2) It is isotonic to plasma.
3) It is essentially protein-free.
4) It has a higher concentration of glucose than plasma.

📝 Explanation:

Glomerular filtrate is essentially protein-free, allowing for the passage of water, electrolytes, and small molecules while retaining larger proteins in the bloodstream.

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