If an injury leading to cell degeneration is of sufficient intensity and duration:
A) ischemia will result in simple necrosis.
B) the cell will undergo coagulation necrosis.
C) the cell will become inflamed and may burst.
D) irreversible cell injury will lead to cell death.
Answer: D) irreversible cell injury will lead to cell death.
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Osmoconforming sharks take in water, as needed, _____
A) by migrating to freshwater rivers to drink fresh water B) via osmosis, as their body cells are slightly hyperosmotic to seawater C) via active transport of water across the cells on their gills D) by water diffusion from seawater, which is hyperosmotic to the fluids in their cells E) by selective transport of water molecules across the wall of the gut
The atomic nucleus consists of
a. neutrons and electrons. b. neutrons only. c. protons and electrons. d. neutrons and protons. e. protons only.
When ventricles are full of blood, which valves
are closed?
a. atrioventricular b. aortic c. pulmonary d. aortic and pulmonary e. all of these valves are closed
Which of the following statements about the intermediate disturbance hypothesis are true? Check all that apply.
_____ The intermediate disturbance hypothesis predicts that most communities eventually reach an end-state or climax community. _____ Intermediate disturbance should lead to increases in species richness. _____ Disturbances tend to lead to the dominance of K-selected species. _____ An example of intermediate disturbance would be a tree fall in a mature rain forest. _____ Intermediate disturbance should lead to all successional stages being present in the community at the same time.