Ch 29 pre test

oppose(s) progesterone and begin(s) labor? rising estrogen rising oxytocin prostaglandin production All of the listed responses are correct.

ALL

Which of the following is NOT an effect of pregnancy on the mother? The mother's nutrient requirements increase. Mammary glands increase in size, and secretory activity begins. Maternal blood volume decreases. The uterus increases in size.

Maternal blood volume decreases.

Which of the following does NOT happen during oocyte activation? Cortical reaction prevents polyspermy. Enzymes are activated to increase the ovum's metabolic rate. Meiosis II is completed. The first cleavage is completed.

The first cleavage is completed.

Gastrulation produces three germ layers. Which of the following is NOT one of the germ layers? mesoderm endoderm ectoderm blastocoele

blastocoele

A hollow ball of cells created by cleavage is called a __________.

blastocyst

term for the events that occur during the first two months of development after fertilization?

embryological development

What is the name of the medical specialty that focuses on the postnatal period from infancy through adolescence?

pediatrics

Gestation is divided into __________.

trimesters

Fraternal, or dizygotic, twins result from __________.

two oocytes being ovulated in one cycle

Fertilization usually occurs in the __________.

uterine tube

In strict dominance, a dominant allele __________.

will be expressed 100 percent of the time when paired with a recessive allele

Which of the following forms the placenta?

chorion

A sequence of cell divisions that begins after fertilization is called __________.

cleavage

The first secretion produced for the baby by the mammary glands, which contains more protein and less fat, is __________.

colostrum

Which of the following is the term for the developmental events that occur from nine weeks to birth?

fetal development

What is the term for having two different alleles for one gene?

heterozygous

The term for the event that occurs when the blastocyst contacts the endometrium and grows into the endometrium is __________.

implantation

Which of the following is the term for aging, or growing old?

senescence

What is the term for the type of inheritance in which the allele is found on the X chromosome and therefore most often affects males?

sex-linked inheritance

The first stage of labor, during which the cervix opens, is called __________.

the dilation stage