An essential nutrient is one necessary for good health that may or may not be synthesized by the body
Indicate whether the statement is true or false.
FALSE
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An antibiotic is circulating through the blood when it passes through the kidneys. Only a miniscule amount of it passes through the glomerular capillary and enters the glomerular filtrate, but 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. Sodium ions crossing into the blood of the peritubular capillary increases osmotic pressure and forces the antibiotic into the proximal tubule. C. The antibiotic is actively transported into the proximal tubule during tubular secretion. D. Stimulation from nerves causes the efferent arteriole to constrict and force the antibiotic through the glomerular capillary into the filtrate.
Which of the following is not a reason why substances are either not reabsorbed or are incompletely reabsorbed from the nephron?
A) They lack carriers. B) They are not lipid soluble. C) They are too large to pass through the fenestrations. D) They are extremely complex molecules.
Changes in temperature of the skin or internal organs are detected by _________.
nociceptors thermoreceptors baroreceptors the hypothalamus
A "pilus" is another term for what?
A. A hair's growth center B. A sensory nerve fiber around the base of a hair C. A gland associated with a hair follicle D. A hair E. A muscle that moves a hair