Which of the following events occurs last?
A. IP3 stimulates Ca2+ release from the endoplasmic reticulum.
B. Ca2+ binds with calmodulin.
C. IP3 (inositol triphosphate) is produced.
D. Epinephrine combines with membrane-bound receptor on smooth muscle cell.
E. Calmodulin binds to the enzyme that phosphorylates myosin and cross-bridges form.
Answer: E
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A) Gametes B) Sperm C) Ova D) All of the above
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A) objective lenses B) focus knobs C) condenser D) iris diaphragm
What does the “principle of complementarity of structures and function” mean?
Fill in the blank(s) with the appropriate word(s).
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A. dissolve the mucosa of the vagina B. dissolve the mucosa of the uterus C. dissolve the stickiness of the semen D. penetrate the vagina E. penetrate barriers surrounding the ovum