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repro > Regulation of Reproduction - Neuroendocrinology > Flashcards

Regulation of Reproduction - Neuroendocrinology Flashcards

1
Q

Pathways for simple neural reflex

A 
Stimulus
Sensory neurons
Transmission (internuerons)
Efferent nurons
Neurotransmitter
Target tissue
Response by target tissue
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2
Q

Pathway for neuroendocrine reflex

A 
Stimulus
Sensory neurons
transmission
Efferent neurons
Hypothalamus
Neurohormone
blood
target tissue
response by target tissue
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3
Q

Oxytocin produced where

A

Hypothalamus

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4
Q

LH, FSH, ACTH, PRL, GH, TSH

A

Anterior pituitary

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5
Q

Hormone definition

A

Substance produced by special cells thats carried in the blood stream and affects activity of body function

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6
Q

Endocrine gland

A

Gland that produces hormones

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7
Q

Reproductive hormone traits

A 
Small quantities
Influence each other
Provide feedback 
Short half lives
Bind to specific receptors
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8
Q

Top 6 Repro Hormones

A 
Driver - GnRH
Stimulator - FSH
Ovulator 0 LH
Receptor - E2
Regulator - Progesterone P4
Terminator -Prostaglandin PGF2a
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9
Q

Classification of hormones

A 
Neurpeptides
Proteins
Glycoproteins
Prostaglandins
Steriods
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10
Q

How are hormones classified

A

Based on source/origin

Hypothalomic
pituritay
gonodal
uterine
placental
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11
Q

Hypothalamus

A

Released GnRH
Tonic center and surge center
Acts on anterior pituitary

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12
Q

Surge Center

A

Sensitive to positive feedback

Secretes high amplitude and high frequency GnRH

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13
Q

Tonic Center

A

Small secretion of GnRH

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14
Q

Anterior Pituitary

A

has Portal system

LH, FSH, Prolactin

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15
Q

Posterior Pituitary

A

No Portal system

Oxytocin and vasopression

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16
Q

Neurohormones

A

Oxytocin

17
Q

Releasing hormone

A

GnRH

18
Q

Gonadotrphin hormones

A

FSH, LH

19
Q

Pregnancy maintenance hormones

A

Progesterone

P4

20
Q

Luteolytic hormones

A

PGF2a

21
Q

Hormones stimulating maternal ovaries

A

eCH, hCG

22
Q

Oestrogen action

A

Female receptivity, secondary sex characters, female sexual behavior

23
Q

Progesterone action

A

Sexual behavior, pregnancy maintenance

24
Q

Testosterone action

A

Sexual behaviour, spematogenesis

25
Q

Prostaglandin

A

CL regression, uterine contractions

26
Q

Inhibin action

A

Inhibits FSH release

27
Q

Strength of hormone action depends on

A

Half life
Duration on secretion
Receptor-hormone affinity
Receptor density

28
Q

Pheromones

A

Volatile substances excreted to outside atmosphere
Affect repro performance
Enhance puberty

29
Q

Female Feedback

A

CL releases P4 negative to hypothalamus

Follicle releases E2 (positive feedback)

30
Q

Negative feed back

A

CL releases P4

Supression of GnRH neurons

31
Q

Positive feedback

A

Stimulaiton of GnRH neurons

32
Q

High negative feedback(P4) release from CL causes:

A

Inhibits GnRH neurons = on secrete basal level on GnRH = no FSH and Low LH = little follicular development (pregnant or midcycle)

33
Q

hIGH POSITIVE FEEDBACK (E2) from follicle =

A

Enhances GnRH = LH and FSH secretion causing ovulation

repro (17 decks)

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