unit 8

Question 1

which muscle surrounds the spermatic cord & its testis (it contracts in cold weather)

Answer 1

Cremaster Muscle

Question 2

Spermatogenesis beings

Answer 2

Seminiferous tubules

Question 3

interstitial cells that produce testosterone are also known as

Answer 3

Leydig cells

Question 4

Where does sperm mature

Answer 4

Epididymis

Question 5

Pathway to sperm

Answer 5

seminiferous tubules→ Rete testis→ Efferent ductules→Epididymis→Vas deferens→Pelvic cavity→Seminle vesicle→ Ejaculatory duct→Urethra

Question 6

How long mature sperm remain fertile before they are ejaculated

Answer 6

40-60 days

Question 7

Know the term for the two large cylinders of erectile tissues that fill the shaft of the penis

Answer 7

Corpus Carvenousa

Question 8

Know which hormones promote the enlargement of the testes

Answer 8

Follicle stimulating hormone(FSH)
Luteinizing hormone (LH)

Question 9

What is the purpose of the enzymes contained in the acrosome

Answer 9

help sperm penetrate the egg during fertilization

Question 10

2 qualities of semen that aids in fertilization

Answer 10

stickiness & alkalinity

Question 11

Primary reproductive organs in females

Answer 11

ovaries

Question 12

What does the ovary contain

Answer 12

1000s of IMMATURE eggs

Question 13

know the usual site of fertilization

Answer 13

Ampulla

Question 14

which layer of the uterus does the embryo attach to

Answer 14

Endometrium

Question 15

which structures of the female breast secrete milk during laction

Answer 15

Acini

Question 16

know the hormone that stimulates the development of a follicle in women

Answer 16

FSH

Question 17

persistent high levels of estrogen & progesterone would cause what to occur

Answer 17

Inhibit pituitary from to produce FSH & LH so no other follicle develop

Question 18

persistent high levels of estrogen & progesterone would cause what to occur

Answer 18

lack of follicular development

Question 19

which hormone is secreted by a developing follicle & what effects occur

Answer 19

Secrete estrogen which stimulates the thickening of the endometrium in the menstrual cycle smalls amounts of progesterone

Question 20

If a female patient had lab results that revealed a high level of luteinizing hormone, what would you suspect

Answer 20

Ovulation; Sudden spike in LH causes follicle to rupture & release the ovum

Question 21

Know how many chromosomes a zygote has

Answer 21

46 Chromosomes

Question 22

Typically, how long does gestation last

Answer 22

280 days/ 40wk

Question 23

which stage of pregnancy are most of the organs developed

Answer 23

second trimester

Question 24

know the term for the blackberry-like cluster of cells that enter the uterine cavity 3 to 4 days after ovulation

Answer 24

morula

Question 25

When does implantation occur (approximately)

Answer 25

6 days of ovulation

Question 26

know which portion of the blastocyst fuses with the endometrium

Answer 26

Thromphoblast

Question 27

define hCG & what does it do?

Answer 27

Hormone secreting estrogen & progesterone; progesterone stimulates endometrium growth & prevents menustation

Question 28

Describe the amnion and what a fetus is able to do

Answer 28

Transparent sac that completely envelopes the embryo filled with amniotic fluid: fetus can "breathe" fluid & swallow

Question 29

The allantois serves as the foundation for

Answer 29

developing umbilical cord

Question 30

The chorion forms the

Answer 30

Fetal side of the placenta

Question 31

The umbilical cord contains

Answer 31

2 umbilical arteries , 1 umbilical vein

Question 32

Blood returns to the fetus from the placenta via

Answer 32

umbilical cord vein

Question 33

Describe the role served by the ductus venosus

Answer 33

shunts blood around the liver

Question 34

What symptoms would you expect to see if the ductus arteriosus fails to close at birth? why?

Answer 34

respiratory difficulty, blood will enter babys lungs

Question 35

know when the fetal heart begins to beat

Answer 35

day 22

Question 36

quickening or fetal movement can usually be felt when

Answer 36

20 wks

Question 37

the fetal respiratory system although immature, is capable of gas exchange at how many weeks

Answer 37

wk 28

Question 38

the onset of labor is thought to result from several factors such as

Answer 38

decline of progesterone release of oxytocin uterine stretching

Question 39

stage 1 of labor ends when

Answer 39

The cervix is fully dialated

Question 40

stage 2 of labor ends when

Answer 40

head emerges, mucus is cleared from baby mouth/nose to facilitate breathing. Umbilical cord clamped & cut

Question 41

when hormone cause the lobules in the breast to contract, forcing milk into the ductus

Answer 41

Oxytocin

Question 42

Apgar score rating

Answer 42

7-10 normal 4-6 fairly low 3 & below critically low

Question 43

Difference between homozygous & heterozygous

Answer 43

Homozygous (alleles same) Heterozygous (Alleles different)

Question 44

what is a genome

Answer 44

A complete set of genetic information for one persome carried on the 23 pairs of chromosomes

Question 45

chromosomes ingerited from mother & father, but do not play a role in determination of gender

Answer 45

autosomes

Question 46

Alleles that are equally dominant

Answer 46

Codominant

Question 47

Know which disorder causes a syndromes who characteristics include a webbed neck & short stature

Answer 47

turners syndrome

Question 48

Klinefelter syndrome results from

Answer 48

nondysfunction of sex chromosomes

Question 49

Know what happens to children who inherit one copt of allele in autosomal recessive disorder like do they manifest symptoms of the disorder, are they carriers of the disorder or are they unaffected

Answer 49

they are carriers of the disorder

Question 50

describe multifactorial disorders

Answer 50

disorder resulting from many contributing factors including genetic & environment