Which type of blood vessel plays a key role in regulating blood flow into capillaries?
a) arteries
b) arterioles
c) venules
d) veins
e) aorta
b
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A premature infant often is able to survive if born in the
A) first trimester. B) few days prior to the expected due date. C) second trimester. D) third trimester. E) None of the answers are correct.
Dogs are herbivores
Indicate whether the statement is true or false
Which of the labeled steps in the diagram represent formation of the primitive heart tube?
a) A b) B c) C d) D e) E
Match the following:
A) Energy B) Mass C) Weight D) Matter 1) Can be measured only by its effects on matter. 2) Anything that occupies space and has mass. 3) Although a man who weighs 175 pounds on Earth would be lighter on the moon and heavier on Jupiter, his ________ would not be different. 4) Is a function of, and varies with, gravity.