The purpose of the ovum's zona pellucida is to:
a. Make a pathway for more than one sperm to reach the ovum.
b. Allow the 46 chromosomes from each gamete to merge.
c. Prevent multiple sperm from fertilizing the ovum.
d. Stimulate the ovum to begin mitotic cell division.
C
Fertilization causes the zona pellucida to change its chemical composition so multiple sperm cannot fertilize the ovum.
Once sperm has entered the ovum, the zona pellucida changes on order to prevent other sperm from entering.
Each gamete (sperm and ovum) has only 23 chromosomes; there will be 46 chromosomes when they merge.
Miotic cell division begins when the nuclei of the sperm and ovum unite.
You might also like to view...
The nurse knows that routine hygienic care does not include:
a. massage with lotion. b. oral care with a toothbrush. c. shaving with a disposable razor. d. ear hygiene with cotton-tipped applicators.
The nurse arrives at the bedside of a patient who has had a unit of packed cells infusing in his right arm for 35 minutes. He is complaining of chills, itching, and shortness of breath. The next action for the nurse would be to
a. leave and get help. b. take the patient's temperature. c. give him his nose spray. d. stop the transfusion and IV administer saline.
Change 9/10 to a percent
1. 900% 2. 9% 3. 90% 4. 99%
Opening to the spiritual dimension can BEST be facilitated through which of the following activities?
a. reading about the human dilemma b. leading the soul's journey toward wholeness c. intensive discussion about the role of religion d. connecting with one's goals and purpose