Which of the following varies rhythmically with respiration?

A) atmospheric pressure only
B) intrapleural pressure only
C) intra-alveolar pressure only
D) both intrapleural pressure and intra-alveolar pressure
E) both atmospheric pressure and intrapleural pressure


Ans: D) both intrapleural pressure and intra-alveolar pressure

Biology & Microbiology

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True or False: Altruism occurs when an individual reduces his or her own fitness and increases the fitness of another individual

A. true B. false

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Sarin gas is an inhibitor of an enzyme that functions in the neuromuscular junction to break down acetylcholine. What is the most likely description of how a person would die after inhaling this poisonous gas?  

A.  suffocation via paralysis, or a block in stimulation, of the respiratory muscles B.  epileptic convulsions caused by disorganized electrical activity in the brain C.  by a heart attack D.  suffocation via tetanus, or constant stimulation, of the respiratory muscles E.  paralysis of skeletal muscles Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about the effect of inhibition of acetylcholinesterase? 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?

Biology & Microbiology

The ________ number, or n, is the number of chromosomes contained in the nuclei of gametes, the nonsomatic cells

Fill in the blank(s) with correct word

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