A decrease inPCO2 within the lung will result in a ________ in the pulmonary vasculature and a ________ in the bronchioles.

A) lack of change : weak bronchoconstriction
B) weak vasoconstriction : bronchodilation
C) weak vasodilation : bronchoconstriction
D) vasoconstriction : lack of change
E) vasodilation : weak bronchodilation


Ans: C) weak vasodilation : bronchoconstriction

Biology & Microbiology

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If isolated plant cells with a water potential averaging -0.5 MPa are placed into a solution with a water potential of -0.3 MPa, which of the following would be the most likely outcome?

A) The pressure potential of the cells would increase. B) Water would move out of the cells. C) The cell walls would rupture, killing the cells. D) Solutes would move out of the cells. E) The osmotic pressure of the cells would decrease.

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Which structure forms spores through the process of meiosis?

a. Sperm b. Gametophyte c. Sporophyte d. Spermatocyte e. Zygote

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In which of the following ways is proteobacterial photosynthesis different from plant photosynthesis?

a. Proteobacterial photosynthesis uses a different type of chlorophyll. b. Proteobacterial photosynthesis does not produce oxygen. c. Proteobacterial photosynthesis uses water as an electron donor. d. Proteobacterial photosynthesis uses a different type of chlorophyll and does not produce oxygen e. Proteobacterial photosynthesis occurs in the dark.

Biology & Microbiology

Which of these best completes this concept map?

A. an animal cell B. a prokaryotic cell C. a virus D. a plant cell

Biology & Microbiology