What event most directly precedes the activity illustrated in Figure 40-5?
a. depolarization
b. an action potential
c. acetylcholine release from a motor neuron
d. release of calcium from the sarcoplasmic reticulum
e. release of ADP from the myosin head
E
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The phase of the bacterial growth curve that shows the maximum rate of cell division is the ________.
A. stationary phase B. prophase C. lag phase D. exponential phase E. death phase
Why is hypertension common among elderly people?
a. It arises from years of improper diet. b. It is due to constant exposure to chronic diseases. c. As blood vessels age, blood vessels stiffen and lose flexibility. d. Risk factors tend to increase with increasing age
What environmental challenge is posed to young plants by an old growth forest?
A. low humidity B. high temperatures C. low light D. thick leaf litter 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 the conditions that exist in a mature forest environment? 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? Reflection 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?
While some of the daughter helper T cells are secreting the appropriate interleukins, others form into ________ cells.
A) memory T B) suppressor T C) memory B D) plasma E) cytotoxic T