An Antibiotic Circulating in the Blood Passes Through the Kidneys

question 17

Multiple Choice

An antibiotic circulating in the blood passes through the kidneys. Only a miniscule amount of it passes from the glomerular capillary into the glomerular filtrate. When its presence in the urine is measured, it has been almost completely excreted. How is this possible?

• A) During the process of reabsorption, flow of water across the tubular membrane into the peritubular capillary passively encourages the antibiotic to cross the opposite way.
• B) Stimulation from nerves causes the efferent arteriole to constrict and force the antibiotic through the glomerular capillary into the filtrate.
• C) The antibiotic is actively transported into the proximal tubule during tubular secretion.
• D) Sodium ions crossing into the blood of the peritubular capillary increases osmotic pressure and forces the antibiotic into the proximal tubule.

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Definitions:

Culture

The shared beliefs, customs, arts, and behaviors of a society or group of people.

Immediate Costs

Expenses or charges that are incurred and need to be paid at once or within a very short period.

Culture

The set of shared attitudes, values, goals, and practices that characterizes an institution, organization, or group.

Brain

The organ located in the head of an animal that coordinates its actions and sensory information by transmitting signals to and from different parts of its body.