The loudness of a sound depends on the ____ of the sound wave
a. wavelength
b. amplitude
c. frequency
d. type
e. substance
ANSWER: b
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Another name for crossing over is:
A. realignment. B. reassortment. C. recombination. D. reallocation.
Which of these hormone-action pairs is mismatched?
A. Oxytocin-suckling B. Cortisol-glucose regulation C. Aldosterone-sodium reabsorption D. Atrial natriuretic peptide-muscle contraction E. Testosterone-secondary sex characteristics
The frozen contraction of muscle cells called rigor mortis occurs because after death
a. ions are not available in muscle cells. b. tropomyosin breaks down quickly. c. neurotransmitters are no longer released. d. ATP production stops. e. muscle cells are flooded with neurotransmitters.
Which statement about Down syndrome is correct?
A) Down syndrome is caused by a third copy of chromosome 21. B) Down syndrome is usually associated with chromosomal nondisjunction in meiosis. C) Characteristics of Down syndrome include stubby fingers and a palm crease. D) Individuals affected with Down syndrome display mental impairment. E) All of the answer choices are correct about Down syndrome.