Endocrinology Flashcards Preview

Physiology > Endocrinology > Flashcards

Flashcards in Endocrinology Deck (659)
Loading flashcards...
1

Direct communication

  • Transportation via gap junctions or connexins

 

2

Contact communication

  • Information processing via molecules integrated into the membrane
  • Typical in cells of the immune system

3

Communication by secretion

  • Cells are located relatively far away
  • Molecules are secreted and received
  • Typical of  the immune and nervous system

4

Cytoskeletal communication

  • Metabolism of a cell is influenced
  • This is relayed by the cytoskeletal system

5

Give the types of cell communication

  • Direct communication
  • Contact communication
  • Communication by secretion
  • Cytoskeletal communication

6

Classical endocrine effect

  • Cells secrete hormones
  • Hormones reach recipient cells via blood stream

7

Paracrine effect

  • Signals do not enter the blood
  • Acting on cells of the same tissue adjacent to the original cell
  • Signals are called local chemical mediators 

8

Give the fate of local chemical mediators in the paracrine system

They can be either:

  • Broken down
  • Immobilised
  • Taken up by cells

9

Autocrine effect

  • A special form of paracrine effect
  • Signal-producing cell sends and receives its own signals

10

List the types of information processing in the endocrine system

  • Classical endocrine effect
  • Paracrine effect
  • Autocrine effect
  • Neurotransmitters

11

Which part of the CNS is the integrator of the endocrine system?

The hypothalamus

12

The function of the hypothalamus in the endocrine system depends on...

  • The levels of hormones
  • Information arriving from:
    • Nervous system
    • Immune system

13

Title this figure

Feedback within the endocrine system

14

What is the function of the feedback mechanism in the endocrine system?

It allows fine-tuning in the regulation of signals

15

Hypothalamus

16

Pituitary gland

17

Target organ

18

"Smart" end-users: Peripheral cells

19

Give the classifications of endocrine feedback mechanisms

  • Long feedback
  • Short feedback
  • Ultra-short feedback

20

Give an example of where long feedback occurs

Between:

  • A peripheral gland
  • Hypothalamus

21

Give an example of where short feedback occurs

Between:

  • A peripheral gland
  • Pituitary gland

22

Give an example of where ultra-short feedback occurs

Between:

  • Hypothalamus
  • Pituitary gland

23

Which hormones are used to demonstrate the classical regulatory pathway?

Thyroid hormones

24

Title this figure

Thyroid feedback

25

Hypothalamus

TRH

26

Hypophysis

TSH

27

Thyroid gland

Thyroxine synthesis increases

28

Blood vessel:

Thyroxine level increases

 

29

30