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After traveling through the proximal convoluted tubule, glomerular filtrate enters which of the following nephron components?

A.

Loop of Henle

B.

Bowman's capsule

C.

Collecting duct

D.

Glomerulus

Answer and Explanation

The Correct Answer is A

A. Loop of Henle: After the glomerular filtrate passes through the proximal convoluted tubule, it enters the Loop of Henle. This component of the nephron is responsible for further concentrating the filtrate and plays a critical role in urine concentration.

B. Bowman's capsule: Bowman's capsule is where glomerular filtration begins. It collects the filtrate from the glomerulus, but it is not where filtrate goes after the proximal convoluted tubule.

C. Collecting duct: The collecting duct is the final segment of the nephron where urine is collected after it has passed through the Loop of Henle and distal convoluted tubule. It does not receive the filtrate directly from the proximal convoluted tubule.

D. Glomerulus: The glomerulus is a network of capillaries where filtration of blood occurs, producing glomerular filtrate. It is not a component that the filtrate enters after the proximal convoluted tubule.


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Related Questions

Correct Answer is C

Explanation

a. Outermost layer that lies underneath the pericardial sac: This describes the epicardium, not the endocardium.

b. Outer layer that produces serous fluid: This describes the pericardium, particularly the visceral layer.

c. Inner layer that is continuous with the blood vessels: The endocardium is the innermost layer of the heart, lining the heart chambers and continuous with the endothelium of blood vessels.

d. Central layer that contracts and relaxes: This describes the myocardium, the muscular middle layer of the heart

Correct Answer is A

Explanation

a. Insulin and glucagon: These hormones have opposite effects on blood glucose levels; insulin decreases blood glucose by facilitating cellular uptake, while glucagon increases blood glucose by stimulating glycogen breakdown and gluconeogenesis.

b. Ghrelin and gastrin: Ghrelin stimulates appetite, and gastrin stimulates gastric acid secretion, but they do not directly oppose each other.

c. Calcitonin and melatonin: Calcitonin lowers blood calcium levels, while melatonin regulates sleep-wake cycles; they do not act as antagonists.

d. Androsterone and estradiol: These are sex hormones with different roles but are not direct antagonists; they do not have opposing effects in the body.

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