The NFL has stated that about one in four football players will exhibit signs of cognitive impairment as a result of repeated trauma to the brain. Which of the following is a result of such repeated trauma?

A) Abnormal proteins build up in the brain tissue. B) Brain tissue starts to deteriorate.
C) Neurons in the brain are killed off. D) All of the above are true.


Answer: D

Biology & Microbiology

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A microbial environment containing high nutrient concentrations is called an oligotrophic environment.

Answer the following statement true (T) or false (F)

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Which of the following statements is NOT

generally characteristic of parasites? a. They are specialists and usually are able to affect only one variety of hosts. b. They inflict serious injury and kill their hosts. c. Some reside inside their hosts, whereas others live outside their hosts. d. Their host may be a plant as well as an animal. e. Plants as well as animals can be parasites

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In the cross Cc ยด Cc, gametes have a ____ chance of receiving either allele

a. 25-75 b. 50-50 c. 75-25 d. 60-40 e. 90-10

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What would happen if all of the structures corresponding to the one labeled 6 in Figure 41-1 were

removed from the neuron? a. Impulse transmission would be faster. b. Impulse transmission would be slower. c. Impulse transmission would cease. d. Continuous conduction would occur. e. There would be no effect on transmission

Biology & Microbiology