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Where does HDL in the body come from?

A.

The small intestine

B.

The pancreas

C.

The liver

D.

The gallbladder

Answer and Explanation

The Correct Answer is C

A. The small intestine absorbs lipids but does not produce HDL (high-density lipoprotein). 

 

B. The pancreas produces enzymes and hormones, but it does not produce HDL. 

 

C. The liver is the primary organ responsible for the synthesis of HDL. HDL is involved in reverse cholesterol transport, carrying cholesterol from tissues back to the liver.

 

D. The gallbladder stores and concentrates bile but does not produce HDL. 


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View Related questions

Correct Answer is A

Explanation

A. Y chromosome: The SRY gene on the Y chromosome codes for the testis-determining factor (TDF), which initiates the development of testes and male characteristics.

B. Gonadal ridges: The gonadal ridges are the precursor structures that develop into gonads but do not contain the gene for TDF.

C. X chromosome: The X chromosome contains genes important for development but does not code for TDF.

D. Fetal testes: The fetal testes produce testosterone but are not the source of the TDF gene.

Correct Answer is C

Explanation

A. The renal tubules reabsorb more water. If blood volume and pressure are too high, the body would aim to reduce them, not increase them further. Reabsorbing more water would increase blood volume.

B. The kidneys produce less urine. To lower blood volume and pressure, the kidneys would increase urine production, not decrease it.

C. ADH release is inhibited: ADH (antidiuretic hormone) promotes water reabsorption in the kidneys, leading to increased blood volume and pressure. When blood volume and pressure are too high, the body inhibits ADH release to promote water excretion and lower blood volume and pressure.

D. The renal tubules reabsorb more sodium. Reabsorbing more sodium would lead to water retention, increasing blood volume and pressure, which is the opposite of what the body needs when blood volume and pressure are already high.

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