A fibrin clot that is formed over a skin wound is called a
A) scar.
B) keloid.
C) graft.
D) scab.
E) plug.
D
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Signs of aging at the cellular level are (Select all that apply)
A) impaired cell division and the ability to break down and recycle worn cell parts. B) unrepaired DNA and abnormal proteins. C) a fatty liver and clogged blood vessels. D) graying hair, waning strength, and wrinkles.
Lipids
A) all of the above. B) are insoluble in water. C) contain C, H, and O, but with proportionately less oxygen than in carbohydrates. D) include phospholipids, cholesterol, and fats.
Which of the following statements is/are not true regarding human muscles?
A) Most have both slow and fast fibers. B) Slow fibers are abundant in the calf muscles. C) Eye muscles are composed entirely of fast fibers. D) Slow fibers are abundant in the back muscles. E) Fast fibers are high in myoglobin.
Equal amounts of two solutes, A and B, are placed into the same beaker of water at the same time. Solute A reaches diffusion equilibrium faster than solute B. What is the most likely explanation for this observation?
A. The temperature was greater for solute A than solute B. B. The concentration gradient for A was greater than B. C. Solute A is smaller than solute B. D. Solute A traveled a shorter distance than solute B. E. Solute B is more soluble in water than solute A.