Anatomy and Physiology Answer Key

The antibodies are produced against the glycoprotein

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Unformatted text preview: rly miscarriage, pregnancy problems, and premature birth. Prolactin increases after birth because progesterone levels have declined and the inhibition of prolactin secretion is removed. 4. Treating Female Infertility (page 223) Human Reproductive Technology (page 224) 1. Any three of: • Failure to achieve or maintain and erection • Abnormal ejaculation • Low sperm production • Poor sperm motility • Poor sperm survival • Vas deferens blocked or deformed. 2. Any three of: • Fallopian tubes blocked, damaged, or absent • Problems with ovulation (failure of eggs to mature or be released) • Abnormality or disorder of the uterus that prevents implantation or growth of the embryo • Cervical mucus forms antibodies to the male’s sperm. 3. IVF: The female is given hormones to stimulate the release of several eggs. The eggs are then removed using a suction device and laparoscopy. The eggs are mixed with sperm outside the body. Once fertilization has occurred the egg is cultured to the 8- or 16-cell (blastocyst) stage. It is then placed in the uterus for implantation and further growth. 4. GIFT differs from IVF in that once the eggs are mixed with sperm outside the body they are placed immediately into the fallopian tubes where fertilization occurs as normal (not in a test-tube outside the body as in IVF). Biozone International 2009 Photocopying Prohibited 37 Birth and Lactation (page 225) 1. (a) Stage 1: Dilation: The time during which the cervix is dilating (opening). (b) Stage 2: Expulsion: The time between full dilation and delivery during which the baby is pushed to the vaginal entrance, the head crowns, and the baby is pushed out. (c) Stage 3: Placental stage: The delivery (passing out) of the placenta. The placental blood vessels constrict to stop bleeding. Growth and Development (page 227) 1. The size of the skull becomes proportionately much smaller as an infant grows (birth to adulthood). 2. In the first period of rapid growth the face continues to grow outwards, reducing the relative proportions of the cran...
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This document was uploaded on 01/28/2014.

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