Hypothalamic - Pituitary Function

Question 1

What is the ant and post lobe of the pituitary gland made up of

Answer 1

ant - glandular tissue

post - neural tissue

Question 2

How is the post pituitary linked to the hypothalamus

Answer 2

through a neural network

Question 3

What does the post pituitary secrete

Answer 3

ADH + oxytocin

Question 4

What does the ant pituitary secrete?

Answer 4

tropic hormones

• growth hormones
• follicle stimulating hormone
• thryroid stimulating hormone
• luteinising hormone
• adrenocorticotrophic horome
• prolactin
• melanocyte stimulating hormone

Question 5

What does oxytocin do?

Answer 5

Stimulate uterine contraction and milk ejection

Question 6

What does antidiuretic hormone do?

Answer 6

increases H20 permeanbility and absorption in renal collecting ducts

acts as a vasoconstrictor

Question 7

what is panhypoptuitarism

Answer 7

Wen all hormones from the pituary gland are deficient

Question 8

What does a lack of ADH cause

Answer 8

Diabetes insipidus
deficeincy symptoms
polyuria
polydypsia

Question 9

What would a lack of growth hormone lead to

Answer 9

Dwarfism
deficiency syndromes
hypoglycaemia
short structure

Question 10

What would a lack of LH and FSH lead to?

Answer 10

Deficiency symptoms
Estrogen
Delayed puberty
Amenorhea

Question 11

What would a lack of TSH lead to?

Answer 11

Hypothyroidism 
Fatigue 
Constipation 
cold intolerance 
bradycardia

Question 12

What would a lack of ACTH lead to?

Answer 12

hypoglycaemia
vomiting
malaise

Question 13

what are causes of hypersecretion

Answer 13

tumours that ignore normal regulatory input and continuously secrete excess hormone

Question 14

What is usually the problem with primary hypersecretion

Answer 14

abnormality within the gland

Question 15

what is usually the cause of secondary hypersecretion

Answer 15

Excessive stimulation from outside the gland

Question 16

What are the consequences of hypersecretion

Answer 16

increased production of the previous hormones mentioned

Question 17

Increase in ACTH

Answer 17

Corticosteroid XS

Question 18

increase in prolactin

Answer 18

impaired reproductive function

Question 19

Increase in ADH

Answer 19

Fluid retention and low plasma osmolality

Question 20

increase in TSH

Answer 20

Graves disease

Question 21

Increase in hGH in children

Answer 21

Gigastism

Question 22

Increase in hGh in adults

Answer 22

Acromelagy (enlargement of hands and feet)

Question 23

What is the role of tropic hormones

Answer 23

Regulate hormone secretion by another endocrine glands

stimulate and maintain endocrine target tissues

Question 24

What regulates the pituitary hormone system

Answer 24

hypothalamic hormones ( including hypophysiotropic hormones) 
feedback by target gland hormones

Question 25

What are the hypopysiotrophic hormones

Answer 25

``` GH releasing hormone GH inhibiting hormone ( somatostatin) Thyroid relasing hormone Corticotrophin releasing hormone Prolactin releasing hormone Prolactin inihibiting hormone (dopamine) Gonadotrophin releasing hormone ```

Question 26

what does the corticotrophin releasing hormone release

Answer 26

adrenocorticotrophic

Question 27

What does the gonadotrophin releasing hormone release

Answer 27

FSH and LH

Question 28

When does negative feedback occur?

Answer 28

When hormone is at an optimum level

Question 29

What is primary hyposecretion

Answer 29

too little hormone is secreted due to an abnormality within the gland

Question 30

What is secondary hyposecretion

Answer 30

gland normal secreted due to its deficiency of its tropic hormone

Question 31

What is tertiary hyposecretion

Answer 31

Gland is normal but too little hormone is secreted due to the deficiency of the hypothalamic releasing hormone