Tubular load refers to the amount of a given substance that
A. is present in the blood as it enters the afferent arteriole of the nephron.
B. passes through the filtration membrane into the nephron each minute.
C. can be actively reabsorbed from the filtrate.
D. can be secreted into the filtrate.
E. None of these choices is correct.
B
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Which of these descriptions best matches the term B lymphocytes?
A) adhere to collagen beneath endothelium B) helper cells are one type C) develop into plasma cells and produce antibodies in response to antigens D) kill bacteria using hydrogen peroxide E) often elevated in allergic individuals
Receptor sites on the outer surface of the plasma membrane are made of
a. CAMs b. carbohydrate c. lipid d. keratin e. proteins
Into which organ does the highlighted structure empty?
What part of a spermatozoon contains the nuclear material?
A. Midpiece B. Tail C. Head D. Acrosome cap E. Flagellum