Ch 28 - Chapter 28 Pregnancy and Human Development 1....

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 28 Pregnancy and Human Development 1. During development, the conceptus is called a/an_______ from fertilization through week  8 and a/an ________ from week 9 through birth. a. baby… fertilized oocyte b. embryo… fetus c. fetus… embryo d. zygote… neonate 2. ________ is the process by which sperm become capable of penetrating the oocyte. a. Maturation b. Ejaculation c. Contraction d. Capacitation 3. A fertility clinic cannot simply mix fresh sperm with an oocyte and expect fertilization  because a. freshly released sperm are immature. b. sperm must be exposed to high acidity and abrasive actions of collagen before  their acrosomal enzymes are able to release onto the surface of the oocyte. c. the uterus environment where fertilization occurs is unique and cannot be  replicated. d. the oocyte must be exposed to low acidity to weaken its outer layer so that a  sperm can penetrate. 4. How many sperm cells are required to break through the outer corona radiata of the  oocyte? a. hundreds b. one c. none: sperm are not responsible for penetrating the outer layers of the oocyte d. ten 5. Which of the following stages is the true moment of conception? a. the sperm penetrates the oocyte membrane b. once a male pronucleus is present in the oocyte c. once the chromosomes of the male pronucleus and the chromosomes of the  female pronucleus are united by way of a mitotic spindle d. when the zygote implants on the wall of the uterus
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/23/2009 for the course BIOL 1141 taught by Professor Loripaul during the Summer '09 term at UMSL.

Page1 / 4

Ch 28 - Chapter 28 Pregnancy and Human Development 1....

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online