Endocrine Flashcards Preview

Biological Systems Overview 1st Year Midwifery > Endocrine > Flashcards

Flashcards in Endocrine Deck (20)
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1
Q

What is Negetive feedback?

A

It is a response in a way to reverse the direction of change. It is the most common form of feedback in physiological system.

2
Q

What is positive feedback?

A

A response in a way so as to change the variable even more in the direction of the change . (Rare, few examples )

Used when rapid change in desirable. E.g. blood clotting, ovulation.

3
Q

Name the two hormones released from the posterior pituitary gland.

A

Oxytocin - milk let down and uterus contraction.

Antidiuretic hormone - regulation of water volume

4
Q

Where is the thyroid stimulating hormone released and what is its function?

A

Anterior pituitary gland.

Responsible for stimulating thyroid glands to secrete thyroid hormone.

5
Q

Where is the Adrenoticoyropic hormone released and what is its role?

A

Anterior pituitary gland.

Responsible for stimulating the adrenal cortex to release hormones.

6
Q

Where is the Luteinising hormone released ?

A

Anterior pituitary gland.

Stimulating the ovaries to ovulate and secretion of sex hormones.

7
Q

Where is the follicle stimulating hormone released and what is its biological role?

A

Anterior pituitary gland.

Development of eggs and sperm

8
Q

Where is the growth hormone released and what is its biological role?

A

Anterior pituitary gland.

Growth and energy metabolism. Stimulates IGFs.

9
Q

Where is prolactin released and what is its biological role?

A

Anterior pituitary gland.

Stimulates the mammary gland for the development of milk.

10
Q

What is the normal blood osmolarity range?

A

257 and 295 mOsm/kg

11
Q

What classification of hormones are ; insulin, glucagon and growth hormone?

A

Peptide/polypeptide

  • largest group
  • short chains of amino acids
  • water soluble
12
Q

Name 4 hormones that are Amines.

A

Adrenaline

Noradrenaline

Thyroid hormone

Melatonin

13
Q

Name 3 Glycoproteins.

A

Luteinizing hormone

Follicle stimulating hormone

thyroid stimulating hormone

THEY ARE ALL WATER SOLUBLE

14
Q

Name 3 steroids

A

Cortisol

Aldosterone

Testosterone

15
Q

What are hormones?

A

Hormones are chemical signals produced in endocrine glands or tissue that travel in the bloodstream to cause an effect on other tissue.

16
Q

Where is stimuli received?

A

At receptors

E.g. chemoreceptors

Thermoreceptors

17
Q

Autocrine is when………..

A

Hormone signal acts back on the cell of origin

18
Q

Paracrine is when…….

A

Hormone signal is carried to adjacent cells over a short distance.

19
Q

Endocrine is when……..

A

Hormone signal released into bloodstream and carried to distant target cells.

20
Q

Neurocrine is when………

A

Hormone originates in neurone and after transport down axon released in bloodstream and carried to distant target cells.