Sem 2B Weeks 10-12 Flashcards Preview

BMS109 Phys/Pharm > Sem 2B Weeks 10-12 > Flashcards

Flashcards in Sem 2B Weeks 10-12 Deck (56)
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1

Accessory glands in male repro system

Bulbourethral Prostate Seminal vesicles

2

Which hormone are sertoli cells sensitive to

FSH

3

What is the role of the tunica vaginalis

Thick layer of connective tissue that lines the scortal cavity and reduces friction

4

What is interesting about the seminiferous tubules

Blind ended - begin and end in the rete testes

5

Oestrogen peaks before

FSH and LH

6

How do primary spermatids form the early spermatids

Undergo meisois I to form the secondary spermatids Undergo meiosis II to form the early spermatids

7

What is the role of leydig cells

Produce testosterone - lots of SER

8

What can be said regarding avergae muscle mass and fat content in men and women after puberty

On average men have more muscle mass and women more fat

9

What structure separates the lobules of the testes

Speta

10

Describe some of the skeletal sexual dimophism seen in men and women during puberty

Shoulders of men grow more than women Hips of women grow more than men

11

How long does a menstural cycle last in reality

28 days (23-35 days)

12

What changes can be seen during puberty

Repro organs change size, pubic hair, deepening of the voice, menarche

13

Which region of the ovary contains the developing eggs

Cortex

14

What is the pH of the semen Why is this the case

7.35-7.5 Neutralise any urine in the urethra

15

Effects of FSH in females

Stimulates follicle cells to produce oestrogen during the pre-ovulatory phase Causes ovulation Stimulates corpus luteum to produce progesterone during post ov phasse

16

What could precocious puberty indicate

Pituitary tumour

17

List some potential causes of delayed puberty

PCOS Chronic illness Nutritional issues Inherited factors Excessive exercise

18

What is the dartos muscle

Subcutaneous muscle that pulls the testes toward the body creating the wrinkled appearance of the scrotum

19

Why are the testes outside of the body

Sperm dev one deg below body temperature

20

Outline the stages folliculogenesis

Primordial follicles --> primary follicles --> secondary follicles --> tertiary follicles --> corpus rubrum --> corpus luteum --> corpus albicans

21

How long after peak LH levels does implantation occr

6-7 days

22

What is the role of the ovaries

Contain oocytes and produce steroid hormones which drive the menstrual cycle

23

At the start of puberty ______ are taller than ______ how does thia compare with at the end of puberty

women than men Men taller at end

24

What produces oestrogen

Follicles

25

What produces progesterone

Corpus luteum

26

Which hormone stimulates the action of the Leydig cells

LH

27

What gender begin puberty first

Girsl

28

Define precocious puberty

Pibic hair growth occuring before 6-8 years in females and before 9 in males

29

What is the name for the central region of the testes

Medastinum testes

30

What is the name of the connective tissue layer that surrounds the ovary

Tunic albuginea

31

What is hypospadias

Where the urethral meatus is present on the ventral side of the shaft of the penis

32

Progesterone peaks around

Day 24

33

What is the difference seen between puberty and adolescence

Puberty - phsycial changes Adolescence - physiological/behavioural changes

34

What is the name given to cell death exhibited in the follicles

Atresia

35

What cell types are contained in the seminiferous tubules

Seminiferous epithelium Myoid cells - contract to propel non-motile cells along the semifierous tubules

36

What is the name of the cuboidal epithelial cells that surround the ovary and are derived from the peritoneum

Germinal epithelium

37

What are the phases of a menstural cycle

Preovulatory - mediated by oestrogen Post ovulatory phase - mediated by progesterone

38

Effects of LH in males

Stim leydig cells to produce testosterone Stim speratogenesis

39

Why do very tight junctions exist at the basolateral membranes of the sertoli cells

Prevent the immune system from recognising sperm cells and producing antibodies - lead to infertility

40

Delayed pubery can be defined in boys and girls as more than 2 years since the start of puberty without completion

F more than 5 years since start of puberty without completion

41

Effects of FSH in males

Stim of sertoli cells to produce androgen-binding protein Stim speratogenesis Simulates sertoli cells to produce inhibin providing negative feedback to the anterior pituitary to decrease FSH secretion when testosterone levels become too high

42

Where are mature sperm stored

Epididymis

43

Recall the pathway of spermatogenesis

Spermatogonia - Primary spermatids - secondary spermatids - early spermatids - spermatozoa

44

What is the name of the region of the ovary that contains the majority of the blood supply

Medulla

45

Why are men more likely to get inguinal hernias

Testes have to push through the anterior abdominal wall to drop into scrotal sac

46

What are the roles of the sertoli cells

Contain vesicles in which the sperm develop Provide nutritional and mechanical support to germ cells, steroidogenic, secretion of proteins

47

How do sermatogonium dividie

Mitosis

48

What is meant by ovarian asymmetry

Only one ovary is active each month

49

What is the tunica albuginea

Dense layer of connective tissue continuous with the fibres surrounding the epididymis

50

Names of the tubules which make up the male repro system

Ductus deferens Urethra Seminiferous tubules

51

Effects of LH in females

Stim follicle cells to produce oestrogen during pre ov phase Causes ovulation Triggers formation of corpus luteum

52

What are the phases of testicular decent

Transabdominal Inguinal phase

53

Why is puberty beginning earlier now than 50 years ago

Better nutrition

54

What remains constant during folliculogenesis

The size of the egg

55

What change has been seen in the age of menarche

Decreased

56

Define puberty

Period at the beginning of adolscence where the sex glands become functional and the secondary characteristics emerge