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A&P 1,2,3 > A&P Exam 4 > Flashcards

A&P Exam 4 Flashcards

1
Q

A blastomere is a; and a blastocyst is

A

cell produced by cleavage / a hollow ball of cells

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2
Q

Which of the following is a function of HCG

A

Protects the blastocyst against being rejected

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3
Q

Which is of the following is NOT true about the fetal stage of development

A

It includes the blastocyst and morula stages.

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4
Q

A major body part derived from endoderm is

A

Nervous system and skin

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4
Q

A lack of oxytocin secretion from the posterior pituitary gland during birth

A

Will reduce uterine wall contractions

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5
Q

After birth, the foramen ovale is closed as a result of

A

increasing pressure in the left atrium

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6
Q

Amniotic fluid

A

protects the embryo against being jarred by movements

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7
Q

Apoptosis occurs

A

from the embryo onward

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8
Q

Centenarians are

A

People who live pass the age of 100

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9
Q

Compared to cow milk, human milk has

A

1/3 of the protein

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10
Q

Dizygotic twins result from

A

Two eggs and two sperms

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11
Q

During the embryonic stage. the primary germ layers develop from the

A

develop from embryotic disc

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12
Q

Embryonic stem cells are derived from the

A

inner cell mass of a blastocyst

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13
Q

Fertilization usually occurs in

A

Uterine tube

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14
Q

Fetal hemoglobin becomes largely replaced with adult hemoglobin

A

At four months after birth

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15
Q

Compared to adult hemoglobin, fetal hemoglobin

A

binds oxygen more readily

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16
Q

Human life span is

A

120 years

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17
Q

In fetal circulation, blood from the ; flows directly into the

A

ductus arteriosus

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18
Q

Labor is regulated by

A

positive feedback control

19
Q

Sperm movement through the uterus and uterine tubes is aided by muscle

A

Prostaglandins

20
Q

Tertogens are substances that

A

state present during gestation that is capable of inducing abnormal postnatal structure or function

21
Q

The ductus arteriosus allows fetal blood to move from the

A

pulmonary trunk into the aorta

22
Q

The foramen ovale is an opening that allows fetal blood to pass from the

A

right atrium to the left atrium
Opening in the interatrial septum of the fetal heart.

23
Q

The implantation of the blastocyst results from

A

enzymes digesting the endometrium around the blastocyst

23
Q

The inner cell mass

A

gives rise to the embryo

24
Q

A baby has three copies of each chromosome in every cell

A

polyploid

25
Q

The ductus venosus is a fetal vessel that transports blood from

A

Umbilical vein and inferior vena cava in fetus

26
Q

A human cell that has 47 chromosomes is

A

Trisomic

27
Q

A human cell with 46 chromosomes is

A

Diploid

28
Q

A human cell that has 69 chromosomes is

A

triploid

29
Q

A karyotype is

A

a size ordered chart of chromosomes

30
Q

A multifactorial trait is determined by

A

one or more genes and the environment

31
Q

An allele that is not expressed in the heterozygous condition is

A

Recessive

32
Q

An allele that masks that effect of another

A

Dominant

32
Q

An example of sex-influenced trait

A

Baldness

33
Q

Different alleles of the same gene are said to be

A

heterozygous

34
Q

Genetics is the study

A

inheritance of characteristics

35
Q

How alike are our genomes

A

nearly 100% 99.9

36
Q

Identical alleles are said to be

A

homozygous

37
Q

In incomplete dominance

A

one allele is not dominant over the other / phenotype is not intermediate in between

38
Q

The human genome consists of

A

DNA which most don’t encode proteins

39
Q

The origin of the 46 chromosomes in a human zygote

A

half from sperm and half from egg

40
Q

The processes that pass genetic information from generation to generation

A

meiosis and fertilization

41
Q

A pedigree is a chart that aligns chromosome pairs by size

A

False

42
Q

The hormones that maintain the uterine wall during the last 5 to 6 months of

A

placental estrogen and progesterone

A&P 1,2,3 (4 decks)

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