B. A mature red blood cell is shaped like a biconcave disc because it has no nucleus.
A. its ability to pump blood under high pressure to all areas of the fish's body.
B. its ability to maintain a constant blood pressure in the fish.
C. its ability to stay full of blood even as it is emptying into the conus arteriosus.
D. its ability to pump blood to the gills for gas exchange before the blood is pumped to the remaining areas of the body.
E. its ability to keep oxygen-rich blood in one chamber separate from oxygen-poor blood in the other chamber.
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know about the effect of exercise on heart rate? What other information is related to the question?
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
D. its ability to pump blood to the gills for gas exchange before the blood is pumped to the remaining areas of the body.
Clarify Question
What is the key concept addressed by the question?
· This question is asking about the nature of the heart of a fish.
What type of thinking is required?
· Apply level:
o You are being asked to take what you already know and use, or apply, it to determine the metabolic advantage that is conferred by the two-chambered heart of a fish.
Gather Content
What do you already know about the effect of exercise on heart rate? What other information is related to the question?
· The ventricle of the fish heart pumps deoxygenated blood to the gills, where it picks up oxygen.
· Oxygenated blood moves from the gills through the body.
· Oxygen is a required component of aerobic respiration, which occurs in the cells of the body.
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
· The circulatory system of a fish is subject to fluctuating blood pressures in different regions, so the idea of maintaining high pressure is an answer that can be discarded.
· Oxygenated and deoxygenated blood are not kept separate by the chambers of the fish heart.
· Since the ventricle moves blood to the gills, it becomes oxygen-rich before it moves throughout the body. The high oxygen content allows high metabolism.
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
· Apply level:
o Answering this question correctly depended on your ability to use the circulatory pattern of a fish in a new situation. If you got an incorrect answer, did you remember that the ventricle of a fish heart pumps blood to the gills, or that the gills allow oxygen to move into the blood? Did you have trouble extending the nature of fish blood circulation to determine the correct answer?
You might also like to view...
Match the correct case study in conservation biology with its animal.
A. fruit bats—introduction of new species B. prairie chickens—loss of genetic diversity C. songbirds—introduction of new species D. whales—pollution E. Lake Victoria cichlids—loss of habitat
A fungus is recovered from a nail scrapping. Microscopic examination reveals numerous smooth, thin-walled, club-shaped, multiseptate macroconidia; however, microconidia are absent. The or-ganism can be identified as:
a. Microsporum canis. b. E. floccosum. c. T. rubrum. d. M. gypseum.
Brittle stars can regrow a new arm if an existing one is broken off. This is an example of
A) hermaphrodism. B) parthenogenesis. C) regeneration. D) budding. E) sexual reproduction.
Which statement about the reproductive system of human females is true?
A) Eggs develop within the uterus. B) The corpus luteum secretes progesterone, which helps maintain the uterine lining during pregnancy. C) After 9 months of development, an embryo is called a fetus. D) The cervix is an important structure of sexual arousal.