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Terms in this set (11)
Which of the following animals use their gastrovascular cavity for circulation?
Interstitial fluid in insects is also called...
In animals with double circulation...
the heart must have four chambers
Suppose you are studying the circulatory system of an unknown animal. Which of the following characteristics is the LEAST indicative that it had a high metabolism and an active lifestyle?
A large heart
Bundle branches and Purkinje fibers are critical to your life because they...
cause the ventricles to contract from the bottom (posterior) to the top (anterior) and force blood through the semilunar valves
In humans, blood pressure is lowest in the __________ and is due primarily to _________.
veins/loss of blood volume in the capillaries
Which of the following is NOT a function of the lymphatic system?
all of the above are functions of the lymphatic system
In which animal does blood flow from the pulmocutaneous circulation to the heart before circulating through the rest of the body?
To adjust blood pressure independently in the capillaries of the gas-exchange surface and in the capillaries of the general body circulation, an organism would need a(n)...
four chambered heart
Diffusion rate is proportional to the square of the distance molecules/ions travel. Which of the following would therefore be preferable for a mid-size multicellular exchange?
A system to circulate gases, nutrients, and wastes to and from cells.
Damage to the sinoatrial nodes in humans...
would distrupt the rate and timing of cardiac muscle contractions
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