The circulatory system does which of the following?
a. carries nutrients from the digestive system to all of the body's tissues
b. protects the body from the spread of infection, by playing several roles in inflammation
c. stabilizes the pH of extracellular fluids by buffering acids and bases
d. carries metabolic wastes from the cells of the body to the kidneys for removal
e. all of the above
Ans: e. all of the above
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The medial wall of the orbit is formed by the ethmoid and lacrimal bones.
Answer the following statement true (T) or false (F)
If potassium channels in a neuron were blocked, would it be possible to produce an action potential? If so, describe the probable appearance of these components of a graph: threshold, rising phase, peak, falling phase, undershoot. If not, explain.
What will be an ideal response?
Max works out about an hour every day, using aerobic machines at a gym. During his
moderate physical exercise, blood concentrations of A) oxygen decrease and carbon dioxide increase. B) oxygen and carbon dioxide increase. C) oxygen increase and carbon dioxide decrease. D) oxygen and carbon dioxide remain nearly unchanged.
Which of the following structures is composed of a theca folliculi, granulosa cells, a zona pellucida, and a secondary oocyte?
A. Primary follicle B. Tertiary follicle C. Corpus albicans D. Secondary follicle E. Corpus luteum