muscles that form rings around body openings are described by shape as being _______________ muscles.
Fill in the blank(s) with the appropriate word(s).
circular
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The fetal period occurs during the
A. last 30 weeks of development. B. third through the eighth week of development. C. full term of pregnancy. D. first three weeks of development. E. eighth through the twenty-fourth week of development.
Which of the following is not true of enzymes?
a. They function on the lock and key model. b. They are functional proteins. c. They are catalysts. d. All of the above are true of enzymes.
What is the working distance on a microscope?
A. The distance between the condenser and the slide B. The distance between your eye and the ocular lens C. The distance between the ocular lens and the objective lens D. The distance between the objective lens and the slide E. The distance between the specimen and the slide
Endocytosis
A. is a process that requires a carrier molecule but does not use cellular energy. B. moves material out of the cell. C. ends cell functions. D. is movement of water through a selectively permeable membrane. E. is the bulk uptake of material through the plasma membrane by vesicle formation.