4/13 lecture: development, gestation, birth Flashcards Preview

BIOL 1003 > 4/13 lecture: development, gestation, birth > Flashcards

Flashcards in 4/13 lecture: development, gestation, birth Deck (30):
1

seminal vesicle

provides nutrients in fluid of semen
One of a pair of sac-like glands at the base of the bladder and connected to
the prostate gland that provide nutrients for the semen.

2

sperm

fertilizes egg

3

semen

medium sperm swim in

4

cowper's gland(bulbous urethral)

contributes to semen
A pair of small glands at the base of the penis that secrete seminal fluid.

5

vas deferens

tube sperm travels through, semen goes through
The tube that transports sperm from the epididymis from each testicle to the
urethra in the prostate gland.

6

epidydymus

carries sperm from testest out, where sperm goes after produced/ matured, storage

A long, tightly coiled duct that carries sperm from seminiferous tubules of
the testes to the vas deferens.

7

scrotum

sac
The sac of skin that holds the testicles.

8

testicle

sperm stored here, testosterone produce- hormone (chemical signals)
diploid-> haploid

The organ that produces sperm.

9

urethra

carries urine from bladder
The organ that produces sperm.

10

prostate gland

contributes most to semen
A walnut-sized gland that surrounds the neck of the bladder and urethra
and produces a slightly alkaline, milky fluid that comprises 50–75% of the
volume of the semen.

11

foreskin

The loose fold of skin that covers the end of the penis.

cirumsision- removes foreskin, reduce infection
prevention of disease, cutlural

12

glans

head of penis
The head of the penis

13

anus

The section of the uterus that protrudes into the vagina.

14

rectum

The lower part of the large intestine, between the sigmoid colon and the
anal cana

15

ureter

One of a pair of tubes that carries urine from the kidneys into the urinary
bladder.

16

regulation

1. hypothalamus triggers secretion of Gonadtropin releasing hormone (GnRH)
2. GnRH triggers anterior pituitary to release lutenizing hormone (LH) and follicle stimulating hormone (FSH) hormones travel through bloodstream
3. LH and FSH target testes: LH activates Leydig cells- produce testotserone- FSH activates Sertoli cells- nourishes developing sterm
4. leydig and sertoli cells stimulate spermatoogonia to develop in to sperm

17

sertoli

cells guiding sperm production process, incerase sperm production

18

testosterone

increase

19

LH

decreases- stablizes testes production

20

FSH

increases

21

inbhibin

decrease

22

mean testosterone level graph

descrease in lifetime but not by that much

23

mean testosterone level v. marital status

married males produce less testosterone comparede to unmarried males

24

mean testosterone level v. age (yrs)

nonnomadic
social structure impacts testosterone level

25

fertilization

sperm and egg
head of sperm discsolves, enzymes released, fusin sperm pronucleus inserted, meoisis continued

26

rate of down syndrome v .matenal age

increase due to increase age

27

steps of gestation

zygote - 2 cell stage- 4 cell stage- 8 cell stage- morula- blastocyst- hollow interior- gastrula

28

embroynic devleopment in oviduct

zygote- morula- blastula- gastrula

29

chorion

by placenta, tells copus leteum to stay around until placenta cmes

30

anatropin

molecule affecting gonads

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