Question 1
Question text
As parturition nears, the levels of progesterone ______ and the levels of estrogen ______.
Select one:
a. decrease; increase
b. increase; decrease
c. decrease; decrease
d. increase; increase
Question 2
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Colostrum differs from milk in that it contains
Select one:
a. little fat.
b. no antibodies.
c. more protein.
d. more lactose.
e. more fat.
Question 3
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The hormone(s) responsible for preparing the breasts for lactation during pregnancy is (are).
Select one:
a. estrogen.
b. progesterone.
c. oxytocin.
d. prolactin.
e. both estrogen and progesterone.
Question 4
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Identify the hormone secreted during pregnancy that cause the ducts of the mammary glands to
grow and branch when in high levels.
Select one:
a. Estrogen
b. Progesterone
c. Prolactin
d. Growth hormone
Question 5
Question text
Which of the following is involved in stimulating milk letdown?
Select one:
a. increased estrogen levels
b. increased progesterone levels
c. mechanical stimulation of the breasts that cause release of oxytocin
d. secretion of a small amount of milk
e. None of these choices is correct
Question 6
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If neither testosterone nor mullerian-inhibiting hormone is secreted during embryonic
development
Select one:
a. the paramesonephric duct system degenerates.
b. the mesonephric duct system is stimulated.
c. internally female reproductive structures form.
d. the individual appears as a male.
e. internally male reproductive structures form.
Question 7
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The first functional kidney is the
Select one:
a. mesonephros.
b. pronephros.
c. allantois.
d. bulbos cordis.
e. urorectal septum.
Question 8
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Which germ layer is the thyroid derived from?
Select one:
a. ectoderm
b. mesoderm
c. endoderm
Question text
Germ layers form during the ____ period while organ systems mature during the ____ period.
Select one:
a. embryonic; fetal
b. prenatal; neonatal
c. germinal; embryonic
d. germinal; fetal
e. fetal; germinal
Question 10
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The common junction of the digestive, urinary, and genital systems is the
Select one:
a. cloaca.
b. coelom.
c. allantois.
d. hindgut.
e. anus.
Question 11
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Which of the following statements about the syncytiotrophoblast is false?
Select one:
a. It forms the developing embryo.
b. It is composed of a non-dividing, multinucleated cell.
c. It is nonantigenic, so that it triggers no immune response.
d. It invades the maternal tissues that compose the endometrium of the uterus.
e. It forms lacunae.
Question 12
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An infant who has just started cooing and gurgling in response to smiles and attention from its
parents is about _____ months old.
Select one:
a. two
b. four
c. six
d. eight
e. ten
Question 13
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A clot or plaque which forms on the inside of blood vessel walls is called a(an)
Select one:
a. sclerosis.
b. arteriosus.
c. thrombus.
d. embolus.
e. plaque.
Question 14
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Which of the following vitamins are thought to play a role in decreasing the physiological
changes in aging?
Select one:
a. vitamins A and B12
b. vitamins A and B6
c. vitamins E and C
d. vitamins A and D
e. vitamins A and K
Question 15
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Increased lipid deposits in the tunica intima of large arteries is called
Select one:
a. atherosclerosis.
b. arteriosclerosis.
c. a thrombus.
d. an embolus.
e. hardening of the arteries.
Question 16
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Which of the following characterizes the developmental age of an eight month old infant?
Select one:
a. sits without support
b. rolls from its back to its side
c. smiles in response to people's faces
d. pulls itself up to a standing position
e. None of these choices is correct
Question 17
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Failure of the neural tube to close in the region of the head results in
Select one:
a. anencephaly.
b. ventricular enlargement.
c. cleft palate.
d. soft spots on the skull.
e. hydrocephaly.
Question 18
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Most congenital birth defects are caused by
Select one:
a. inherited traits.
b. lack of oxygen to the fetus.
c. viral infections during pregnancy.
d. unknown causes.
e. None of these choices is correct.
Question 19
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A cleft lip results when
Select one:
a. the two halves of the secondary palate do not fuse.
b. the frontonasal and maxillary processes do not fuse.
c. the lateral edges of the nasal placodes do not fuse with the maxillary processes.
d. the maxillary processes do not fuse with the mandibular processes.
e. None of these choices is correct.
Question 20
Question text
Alcohol ingestion by a pregnant woman can cause birth defects in her baby; alcohol is a(an)
Select one:
a. carcinogen.
b. mutagen.
c. teratogen.
d. oncogene.
e. haptogen.