What are the two specific "conditions" within the definition of Osmosis that makes it different than simple diffusion?
a. movement of water; concentration gradient
b. movement of water; through selectively permeable membrane
c. movement of molecules; through selectively permeable membrane
d. Brownian motion; Concentration gradient
Ans: b. movement of water; through selectively permeable membrane
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Gram staining reveals the presence of gram-negative bacilli in the patient's stool. Thinking about the patient's spike in temperature, you understand now how this bacterium could cause a fever. Which of the following is the correct explanation?
A. Gram-negative bacteria have a thick peptidoglycan layer which confers their ability to cause fever. B. Gram-negative bacteria have two periplasmic spaces which enhance their ability to cause fever. C. Gram-negative bacteria have porin proteins in their outer membrane which confer their ability to cause fever. D. Gram-negative bacteria have lipopolysaccharide in their outer membrane, and the lipid portion confers their ability to cause fever.
In phloem, bulk flow occurs from regions of high to low ________ concentration.
A. solute B. mineral C. water D. cytoplasm E. cytosol