The renal threshold of a substance refers to
A. the number of protein transporters for the substance per tubule.
B. the plasma concentration of the substance below which it does not appear in the urine.
C. the concentration of the substance found in the kidney before the substance becomes toxic.
D. the concentration of the substance in the urine that results in an overall increase in urine volume.
B
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Oligodendrocytes form myelin around the axons of the CNS
Indicate whether the statement is true or false
The inner cell mass of the blastocyst is destined to become the fetus
Indicate whether the statement is true or false
The blood-brain barrier (BBB) is most permeable to which of the following?
A) Sodium, potassium, and chloride B) Platelets, white blood cells, and red blood cells C) Urea and creatinine D) Glucose and oxygen E) Antibiotics