Which of the following is an example of static equilibrium?
A) riding in an elevator B) sitting in a movie theater to watch a film
C) spinning on a merry-go-round at the park D) riding in a car
Answer: B
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In meiosis, each parent cell produces ________
A) two haploid cells B) four diploid cells C) haploid cells that are identical to the parent cell D) two diploid cells E) four haploid cells
Muscle cells contain numerous ________ to serve their high demand for ATP
A) inclusions B) Golgi vesicles C) mitochondria D) lysosomes E) ribosomes
Environmental hypoxia leads to the following pathological response:
A) Vasoconstriction of pulmonary arterioles. B) Decreased ventilation rate. C) Decreased red blood cell numbers. D) Reduced tidal volume.
The hyperpolarization that occurs at the end of an action potential is due to the prolonged
A. open state of chemically gated sodium channels. B. open state of voltage-gated sodium channels. C. closure of chemically gated sodium channels. D. closure of voltage-gated potassium channels. E. open state of voltage-gated potassium channels.