A synapse is:
a. A connection between a neuron and another cell
b. A pathway connecting brain regions
c. An ion channel in a nerve cell membrane
A
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The valve located between the right atrium and the right ventricle is the:
A. aortic. B. mitral. C. bicuspid. D. tricuspid.
An organism that lives on or in another, drawing its nourishment from its host, is known as a:
A. bacterium B. fungi C. parasite D. virus
With pertussis disease, thick mucus blocks the airways.
a. true b. false
The respiratory therapist receives an order to administer a mixture of 80% helium/20% oxygen to a 40 year-old patient in an acute asthmatic episode. Which of the following devices would most effectively deliver the gas mixture to the patient?
A. Simple oxygen mask B. Nonrebreathing mask C. Noninvasive ventilator D. Aerosol mask