What characteristic do simple diffusion and facilitated diffusion share?
A) Both move water across a semipermeable membrane.
B) Both require a special carrier molecule to move substances across the membrane.
C) Both require cellular energy for the transport of substances.
D) Both move a substance from a region of higher concentration to one of lower
concentration without using cellular energy.
D
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Increased pressure in the eye caused by an accumulation of aqueous humor is called astigmatism.
Answer the following statement true (T) or false (F)
The fact that large animals typically have lower basal metabolic rates than smaller animals can be explained by
a. their larger size which means they have more surface area for absorbing radiant energy, so they require less metabolic energy to stay warm. b. their larger size which makes them less susceptible to predation, so they don't have to use energy to escape from predators. c. their greater weight which makes them less inclined to move, so they expend less energy in locomotion. d. their lower surface to volume ratio which means they lose a lesser percentage of their energy to the environment. e. none of these.
The osmotic pressure of a solution is directly related to its ________ concentration.
A. water B. solvent C. matrix D. solute
Which muscle group adducts the thighs?
A) gluteus muscles B) adductor group C) hamstring group D) quadriceps group E) fibularis muscles