Perkins Take Home Test 4

Front 1

Holding your breath for an extended period of time results in

Back 1

respiratory acidosis

Front 2

During the menstrual cycle, progesterone isproduced by

Back 2

the corpus luteum

Front 3

Which of the following help move the oocyte into and through the uterine tube?

Back 3

cilia

Front 4

Leydig cells are located

Back 4

in the spaces between adjacent seminiferous tubules

Front 5

Sperm production in the male requires a scrotal temperature that is

Back 5

lower than body temperature

Front 6

The secretory cells of an ovarian follicle are called the

Back 6

theca interna

Front 7

How many pairs of autosomes does a normal human have?

Back 7

22

Front 8

Implantation usually occurs in the

Back 8

posterior wall of the body or fundus of the uterus

Front 9

The area that stimulates the conscious desire to drink water is located in the

Back 9

hypothalamus

Front 10

During early pregnancy, the main function of hCG is to

Back 10

maintain the corpus luteum

Front 11

The extraembryonic coelom becomes the

Back 11

amniotic cavity

Front 12

The glycoprotein layer between the oocyte and the granulosa cells of an ovarian follicle is called the

Back 12

zona pellucida

Front 13

The endometrium is digested by enzymes released from the

Back 13

trophoblast

Front 14

During the menstrual cycle, progesterone would be at its highest levels

Back 14

late in the postovulatory phase

Front 15

The main control center of the female reproductive system is the

Back 15

hypothalamus

Front 16

The normal number of spermatozoa per milliliter of semen is

Back 16

50,000,000-150,000,000

Front 17

The cells that result from the equatorial division of spermatogenesis are called

Back 17

spermatids

Front 18

Early pregnancy tests are based on detection of what substance in the urine?

Back 18

hCG

Front 19

Bicarbonate ion acts as a

Back 19

weak base

Front 20

Which of the following has occurred by the end of the first month of development?

Back 20

The heart has formed and begun beating.

The placenta has developed.

The eyes have formed and are open.

Ossification has begun.

Urine has begun to form.

Front 21

The chorion develops from the

Back 21

trophoblast

Front 22

The female structure that is homologous to the scrotum is the

Back 22

labia majora

Front 23

The form (stage) of developing male gamete located nearest to the basement membrane of a seminiferous tubule is the

Back 23

spermatogonium

Front 24

During the menstrual cycle, LH is at its highest levels

Back 24

just prior to ovulation

Front 25

The acrosome of a sperm cell contains

Back 25

hyaluronidase for egg penetration

Front 26

The immune system does not normally attack spermatogenic cells because

Back 26

spermatogenic cells are protected by the blood-testis barrier.

Front 27

The carboxyl group of an amino acid acts as a buffer for

Back 27

excess hydroxide ions

Front 28

The term capacitation refers to

Back 28

functional changes that sperm undergo in the female reproductive tract that allow them to fertilize the secondary oocyte.

Front 29

A person is heterozygous for a particular trait if he/she has

Back 29

one dominant allele and one recessive allele for the trait

Front 30

The corpus luteum produces

Back 30

progesterone

Front 31

Interstitial cells (of Leydig)

Back 31

secrete testosterone

Front 32

Human chorionic gonadotrophin is produced by the

Back 32

corpus luteum

Front 33

Drinking plain water after excessive sweating leads to

Back 33

water intoxication

Front 34

Seminal vesicles produce

Back 34

fructose- rich fluid

Front 35

Levels of sodium ions in the extracellularfluid are regulated primarily by

Back 35

aldosterone

Front 36

Most materials cross placenta by

Back 36

diffusion

Front 37

The primary intracellular ions are

Back 37

sodium and chloride ions

Front 38

At day 4 after fertilization, the solid ball of cells that has formed is called the

Back 38

morula

Front 39

The cation that is necessary for generation and conduction of action potentials and that contributes nearly half of the osmotic pressure of extracellular fluid is

Back 39

sodium ion

Front 40

Most pregnancy tests are based on the presence or absence of

Back 40

human chorionic gonadotropin (hCG)

Front 41

Hyperventilation results in

Back 41

respiratory alkalosis

Front 42

Deoxygenated fetal blood is carried to the placenta via the

Back 42

umbilical arteries

Front 43

Hemoglobin picks up a hydrogen ion when

Back 43

it releases oxygen to tissues.

Front 44

Teratogens are

Back 44

agents that induce physical defects in developing embryos

Front 45

The female structure that is homologous to the penis is the

Back 45

clitoris

Front 46

In the male, LH causes

Back 46

testosterone production

Front 47

Onset of puberty in both sexes is signaled by increases in levels of

Back 47

LH

Front 48

The “water” referred to when a woman's “water breaks” prior to delivery is

Back 48

amniotic fluid released when the amnion ruptures

Front 49

When bicarbonate ion diffuses out of red blood cells into plasma, it is usually exchanged with which anion?

Back 49

chloride

Front 50

The function of fructose in semen is to

Back 50

provide an energy source for ATP production by sperm

Front 51

A pH of 6.5 is said to be

Back 51

acid

Front 52

A normal mature human spermatozoa conains

Back 52

23 chromosomes

Front 53

A couple who are both phenotypically normal have a child who expresses a sex-linked recessive trait. Which of the following represents this child's genotype? [Let the trait be designated T (dominant) or t (recessive).]

Back 53

tt

Front 54

The epithelium of the vaginal mucosa is

Back 54

stratified squamous

Front 55

The seminal vesicles are located

Back 55

posterior and inferior to the urinary bladder, in front of the rectum

Front 56

The two alternative forms of a gene that code for the same trait and are at the same locus on homologous chromosomes are called

Back 56

alleles

Front 57

Sertoli cells produce

Back 57

androgen-binding protein

Front 58

The oogenesis begins in females

Back 58

only if an egg is fertilized

Front 59

Colostrum is different from true milk because it contains less lactose and virtually no

Back 59

fat

Front 60

Extracellular fluids are

Back 60

high in sodium and low in potassium

Front 61

An individual whose alleles for a particular trait are said to be

Back 61

homozygous

Front 62

The perineum is bounded by the

Back 62

pubic symphysis, ischial tuberosities, and coccyx

Front 63

The primary means of water movement between fluid compartments is

Back 63

osmosis

Front 64

During spermatogenesis, which of the following undergoes a meiotic division to produce haploid cells

Back 64

primary spermatocytes

Front 65

By doing karyotyping, one can determine the gender of the child because

Back 65

the Y chromosome is much smaller than the X chromosome

Front 66

The part of the female reproductive system that is shed during menstruation is the

Back 66

myometrium

Front 67

During the menstrual cycle, the endometrium would be at its thickest

Back 67

late in the postovulatory phase

Front 68

The human gestation period is about

Back 68

38 weeks

Front 69

The opening between the cervical canal and the uterine cavity is called the

Back 69

internal os.

Front 70

The embryonic period of development covers what time period?

Back 70

the first two months following fertilization

Front 71

If a person's phenotype is intermediate between homozygous dominant and homozygous recessive then inheritance of this trait is an example of

Back 71

codominance

Front 72

The primary determinant of body fluid volume is the

Back 72

number of sodium and chloride ions lost from the kidney

Front 73

If fertilization does not occur, the corpus luteum:

Back 73

degenerates into the corpus albicans

Front 74

The reason the corpus luteum is maintained in early pregnancy is to

Back 74

produce ATP for the developing embryo

Front 75

The process of crossing-over or recombination, of genes occurs during

Back 75

Meiosis I

Front 76

Protein anions are most abundant in

Back 76

the cytosol

Front 77

The observable characteristics of a persons genetic makeup are known as the

Back 77

phenotype

Front 78

The embryonic disc develops from the

Back 78

yolk sac

Front 79

Excessive intake or drinking of water normally leads to

Back 79

reduced ADH secretion

Front 80

Which of the following cells are diploid?

Back 80

secondary spermatocytes

primary spermatocytes

spermatids

All of the above except spermatids.

secondary oocytes

Front 81

Testosterone is produced by

Back 81

interstitial cells

Front 82

In studies of fluid balance, the term water intoxication refers to

Back 82

movement of water from interstitial fluid into intracellular fluid due to osmotic gradients created by ion loss

Front 83

The folds of the peritoneum attaching the uterus to either side of the pelvic cavity are called the

Back 83

broad ligaments

Front 84

Which of the following statements are correct?

Back 84

A strong base plus a weak acid yields a strong acid and a weak base.

A strong base plus a weak base yields a strong acid plus a weak acid.

A strong base plus a weak acid yields water plus a weak base.

A strong base plus a weak base yields a salt plus a weak base.

A strong base plus a strong acid yields a weak base plus a weak acid.

Front 85

The thirst center is stimulated by ALL of the following EXCEPT

Back 85

peripheral chemoreceptors.

angiotensin II.

dry mouth.

baroreceptors.

osmoreceptors in the hypothalamus.

Front 86

For fertilization to occur, a sperm must penetrate

Back 86

zona pellucida

Front 87

The enzyme that allow implantation to occur are produced by the

Back 87

syncytiotrophoblast

Front 88

The fetus s protected from mechanical injury by fluid contained within the

Back 88

amnion

Front 89

An acid may be defined as

Back 89

a donor of hydrogen

Front 90

How many days after fertilization does implantation of the blastocyte occur?

Back 90

6 days

Front 91

A function of FSH in the male is to

Back 91

initiate spermatogenesis

Front 92

Hypernatremia can be defined as a

Back 92

excessive retention of plasma sodium

Front 93

What event marks the beginning of the stage of expulsion in true labor?

Back 93

complete cervical dilation

Front 94

Final maturation of sperm cells occurs in the

Back 94

epididymis

Front 95

The direction of water movement between fluid compartments is determined by

Back 95

the concentration of solutes

Front 96

The principal androgen is

Back 96

testosterone

Front 97

Inheritance of the ABO blood type is an example of

Back 97

codominance

Front 98

Levels of potassium ions in the extracellular fluid are regulated primarily by

Back 98

insulin

Front 99

Oral contraceptives for women typically contain

Back 99

progestin and estrogen