PNB 2250 EXAM 1 QUESTIONS AND
ANSWERS | 100% PASS
Which statement is true?
a. Heme is commonly found within seawater
b. Heme-based proteins played a key role in the metabolism of carbon dioxide into
forms less toxic to cells.
c. Heme-based proteins likely developed as a means by which Fe was ...
a. overcome the limitation of diffusion in providing oxygen to tissues far away from
respiratory membranes
b. provide a mechanism for transport of solutes
c. accelerate the loss of carbon dioxide from the body.
d. can vary the distribution of blood to tissues with the greatest need for oxygen
e. can do all of the above. - Answer✔✔-e. can do all of the above.
An advantage of a four chamber heart is ...(E1)
a. that an animal can have less blood volume (on a % basis) than an animal with a
two...chambered heart
b. an animal can also use peristalsis to move blood around the body.
c. the ability to have two blood circuits within the body.
d. the ability to pump different volumes of blood from the two ventricles. - Answer✔✔-
c. the ability to have two blood circuits within the body.
An open circulation system ...(E1)
a. can use peristalsis or a simple heart.
b. is inversely related to body size.
c. is a high-pressure (>150 mm Hg) system.
d. requires less blood volume that a closed circulatory system.
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