Microbes and humans have evolved a variety of ________ relationships, including ________ where microbes help the host
A) dynamic; commensalism
B) symbiotic; mutualism
C) commensal; mutualism
D) symbiotic; commensalism
E) symbiotic; parasitism
Answer: B
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In secondary active transport, when both the driving ion and the transport ion are in high concentration outside of the
cell, in which direction will the two ions move?
a. As the driving ion moves in, the transport ion moves inb. As the driving ion moves in, the transport ion moves out c. As the driving ion moves out, the transport ion moves in d. As the driving ion moves out, the transport ion moves out e. As long as both ions are moving together, they can go either in or out
The emergent property of “life” appears at the level of the ____, when many molecules become organized
a. population b. atom c. organism d. cell e. community
Paul, physically inactive and obese, suddenly dropped to the ground. His friends called 911, and the emergency medical technicians arrived
An emergency medical technician (EMT) quickly began to perform an EKG on Paul and saw many rapid, irregular waves where individual QRS waves should have been. Based on the information in the text, what is your diagnosis, and what is your suggested treatment? What do you think a physician will recommend to Paul should he survive?
The Na+ and K+ ion gradients across the plasma membrane are produced primarily by the
a. permeability of these ions across the lipid bilayer. b. ratio of these ions in the blood. c. action of the Na+-K+ pump. d. flow of these ions through voltage-gated channels.