As a general rule, blood leaving the right ventricle of a mammal's heart will pass through how many capillary beds before it returns to the right ventricle?
a. One
b. Two
c. Three
d. One or two, depending on the circuit it takes
e. At least two but almost always three
Answer: b. Two
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Genes that are physically close to one another on a chromosome can be influenced by _______, causing phenotype traits to appear together.
a. epistasis b. recombination c. linkage d. codominance
Globally, cigarette smoking kills four million people
annually. That number is expected to increase to _____ million by 2030. a. 10 b. 50 c. 100 d. 150 e. 250
Regulation in biological systems depends on feedback, which is an example of information flow. When diabetes destroys insulin-producing cells, what information flow is disrupted?
A) The body is unable to send signals that indicate the amount of sugar in the blood. B) Cells in the bladder are no longer able to send signals when the bladder fills. C) The pancreas is unable to produce enzymes to break down proteins. D) Appetite signals no longer regulate feeding.
Most carbon dioxide is transported in red blood cells bound to hemoglobin
Indicate whether the statement is true or false