A greater pressure in the right ventricle than the aorta causes the pulmonary valve to open.
Answer the following statement true (T) or false (F)
False
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Which of the following is NOT true of a transmission electron microscope (TEM)?
A. Electrons are passed through the specimen. B. It gives the clearest three-dimensional images. C. The specimen must be fixed in plastic. D. The electron beam is focused with electromagnets. E. The limit of resolution is about 0.1?m.
The fact that people are NOT subject to the same diseases as goldfish describes the presence of __________.
a. innate immunity b. passive immunity c. acquired immunity d. active immunity
A fetus undergoes its largest absolute weight gain during which trimester?
A) first trimester B) second trimester C) third trimester
Which of the following will respond to a threshold stimulus with an all-or-none contraction?
A. a single muscle fiber B. a single motor unit C. a whole muscle D. a single muscle fiber and a single motor unit E. a single muscle fiber, a single motor unit, and a whole muscle