In an open circulatory system a capillaries provide a

19. In an open circulatory system
a. Capillaries provide a large surface area for exchange of nutrients with the tissue
b. No oxygen-carrying molecule is required
c. The heart must create high pressure to drive blood throughout the body
d. The tissues are bathed in oxygen directly
e. Arterioles determine blood flow distribution
20. In a cross section through an artery and vein running parallel in your leg, which vessel
would be the artery?
21. If a molecule of CO2 released into the blood in your left toe is exhaled from your nose, it
must pass through all of the following except:
22. You get your blood pressure measured, and you are told that it is 130/85. The 130 is: 23. Which of the following statements about the electrical stimulation of heart is true?
a. Pacemaker cells located in the SA node in the right atrium initiate action
potentials in response to stimulation by motor neurons
b. The signal is delayed at the AV node to allow the ventricles to fill
c. Electrical circuitry ensures that the right atrium contracts before the left atrium
d. Signals propagate almost instantaneously from the atria to the ventricles because
atrial muscle cells spread the action potential to ventricular muscles cells
e. Serving the sympathetic and parasympathetic nerve input to the heart stops the
heart from beating
24. Komodo dragons ( Varanus komodoensis ) are an endangered species. One of the ways
that conservationists are working to maintain their numbers is through captive breeding
programs in zoos. Typically females are housed alone, and males are transported between
zoos to mate with females and produce offspring. In some cases, females produce
offspring even though they are not in contact with a male. Which term below best
describes the production of offspring by female Komodo dragons housed alone in zoos?

BIOS 1710 PRACTICE Exam 2
BRODIE
a. sexual reproduction
b. fission
c. budding
d. parthenogenesis