Which of the following precursor cells eventually give rise to the platelets?
a) Megakaryoblast
b) Proerythroblast
c) T lymphoblast
d) Monoblast
e) Myeloblast
a
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The swallowing center is located in the ________.
A. mouth B. enteric nervous system C. medulla oblongata D. oropharynx E. esophagus
The phosphorylation of adenosine forms
A) ADP. B) ATP. C) AMP. D) 2ATP. E) ribose.
The distance between the alveolar airspace and capillary endothelium is ________, allowing gases to diffuse ________ between them.
A) long, rapidly B) short, rapidly C) short, slowly D) long, slowly E) None of the answers are correct–distance does not affect diffusion rate.
Which statement accurately describes a condition of the heart chambers during the cardiac cycle?
A. All four chambers of the heart are in diastole at the same time. B. The left atrium contracts before the right atrium. C. All four chambers of the heart contract at the same time. D. The right atrium and the right ventricle contract simultaneously.