During which stage of bacterial growth (growth curve) the bacteria cells are most sensitive to antibiotic penicillin.
A. Log phase
B. Lag phase
C. Death phase
D. Stationary phase
Answer: A. Log phase
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Growth factors such as platelet-derived growth factor function in:
A. autocrine signaling. B. paracrine signaling. C. endocrine signaling. D. juxtacrine signaling.
A diabetic patient has developed gas gangrene of the right foot. The most likely anaerobe causing this infection is:
a. Clostridium tetani. b. Clostridium perfringens. c. Clostridium botulinum. d. Clostridium difficile.
Compared to blood capillaries, lymphatic capillaries__________.
What will be an ideal response?
Which description best fits that of an open circulatory system?
A. The heart pumps blood across gills and then into tissue spaces that are enlarged into saclike sinuses. B. Gases diffuse across a cutaneous membrane and then move into tissue spaces that are enlarged into saclike sinuses. C. The heart pumps hemolymph into tissue spaces that route the fluid across the gills for gas exchange. D. The heart pumps hemolymph into tissue spaces that are enlarged into saclike sinuses.