During the process of filtration, what part of blood passes through the filter?
a. red blood cells
b. white blood cells
c. plasma proteins
d. capillary endothelial cells
e. plasma
e
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Tardigrades are known for being able to survive under conditions that would kill most organisms, including which of the following?
a. loss of up to 99% of their water content b. aging 1,000 years c. parasites d. stomach acid
How is glucose involved in catabolite repression of the lac operon?
A) Glucose causes cAMP levels to increase, which leads to increased CRP binding and the lac operon is activated even when lactose is present. B) Glucose causes cAMP levels to decrease, which leads to decreased CRP binding and the lac operon is repressed even when lactose is present. C) Glucose is also a substrate for ?-galactosidase and thus competes with lactose for this enzyme. D) Glucose activates transcription of the lacI gene to increase the amount of Lac repressor in the cell.
Which of the following is a major risk factor for developing diabetes?
a. geographic location b. obesity c. gender d. exposure to excessive sunlight e. vegetarian diet
The ciliary muscle
A. controls the shape of the lens to maintain a clear image of focus at various distances. B. is the part of the eye that contains rods, cones, and bipolar cells. C. is extremely sensitive to light and responsible for night vision. D. is the internal part of the cochlea with hair cells that are stimulated by sound waves. E. is the part of the inner ear that recognizes rotational equilibrium.