Which of the following is the correct order of structures sperm must penetrate before entering the ovum?
A. Corona radiata, zona pellucida, ovum plasma membrane
B. Ovum plasma membrane, zona pellucida, corona radiata
C. Zona pellucida, corona radiata, ovum plasma membrane
D. None apply.
Answer: A
You might also like to view...
The combining of a series of twitches to produce a more forceful contraction is called ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is the most important stimulus for contraction of the gallbladder?
a. CCK causes contraction of the gallbladder. b. mechanical contraction of the small intestine causes bile to be forced out of the gallbladder. c. sympathetic stimulation causes contraction of the gallbladder. d. an increase in bile secretion by the liver causes contraction of the gallbladder. e. bile salts cause contraction of the gallbladder.
The chemical breakdown of food is ________
A) None of the listed responses is correct. B) anabolism C) catalysts D) catabolism
Which of the following is correct regarding cytoplasm?
A) It is the solid component of the cell. B) It is located between the cells. C) It contains less proteins than does extracellular fluid. D) It contains cytosol and organelles. E) Cytoplasm is also called interstitial fluid.