The activator for the lac operon is:
A. CRP.
B. cAMP.
C. lactose.
D. allolactose.
A
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____ describes the process whereby a phagocyte, in response to cytokines secreted by dendritic (or other) cells, exits a blood vessel and moves into an infected region of tissue
Fill in the blank with the appropriate word.
The fluid portion of semen is produced by
a. the prostate gland. b. the seminal vesicle. c. the bulbourethral gland. d. the urinary bladder. e. all of these except the urinary bladder
Small molecules can move between capillaries and interstitial fluid by _____
A. passive transport B. active transport C. endocytosis D. diffusion E. exocytosis
Complex tissues are tissues consisting of ____.
A. two or more cell types B. only one cell type C. only parenchyma cells D. only collenchyma cells E. only sclerenchyma cells