Which of the following is true of the boys who
were treated for SCIDs using gene therapy?
a. all were cured
b. all died
c. they all improved, but not cured
d. some contracted leukemia
e. none of them were cured
D
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. A research strain of mice has a mutation that causes voltage-gated sodium channels to take longer to return to the active state after a spike. What is the likely consequence for transduction of sensory stimuli?
A. There will be no effect on sensory perception, because sensory information relies on stimulus-gated ion channels and not voltage-gated ion channels. B. Sensory information will be incorrectly perceived as high intensity stimuli, due to the increased frequency of action potentials. C. The mutation will interfere with the ability of stimuli to create receptor potentials, and thus the neuron will fire with slow, broad action potentials, giving the animal enhanced sensory perception. D. Due to a longer refractory period, the neuron will be unable to conduct high frequency action potentials, and thus will not effectively transmit information about strong stimuli. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about action potentials? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? 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?
The MOST major challenge to pH homeostasis is:
A) hyperventilation. B) CO2 elimination. C) acute fluid loss. D) acid production.
The scientific method involves formulating a tentative explanation, called the hypothesis, to account for what has been observed or measured.
Answer the following statement true (T) or false (F)
Which of the following is NOT a chelicerate?
a. tick b. mosquito c. spider d. horseshoe crab e. scorpion