The average person in the United States has an ecological footprint nearly _____ times that of an average world
citizen.
a. two
b. three
c. four
d. five
e. six
ANSWER: b
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What are the vasa recta?
a. looped extensions of the afferent arterioles b. looped extensions of the efferent arterioles c. regions of the renal tubule d. vessels that supply blood to the glomerulus e. vessels that supply blood to the proximal convoluted tubule
Which of the following lists the organization of a mammalian body from least to most complex?
A. Tissue—cell—organ system—organ B. Organ system—organ—tissue—cell C. Cell—tissue—organ—organ system D. Tissue—organ—cell—organ system E. Organ—organ system—tissue—cell
Subsequent to motor neuron degeneration in Charcot-Marie-Tooth disease, muscles begin to weaken and degenerate as well. What is the likely cause?
Charcot-Marie-Tooth is the most commonly inherited peripheral neuropathy, and has no known cure. Patients suffer damage to motor and sensory neurons, leading to degeneration of muscles and gradual loss of motor control. A. Muscles will atrophy if they don't receive regular stimulation from motor neurons. B. Muscles require healthy Schwann cells for myelination as well. C. Muscles contain large numbers of mitochondria. D. Toxins leak out from the dying motor neurons onto the muscles. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content/Choose Answer · What do you already know about components of the nervous system? What other information is related to the question? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Turner syndrome is a
a. monosomy. b. trisomy. c. condition with the normal set of chromosomes. d. condition affecting only boys. e. more than one of these.