Physiology: Intro to Human Physiology and Homeostasis Flashcards Preview

Principles > Physiology: Intro to Human Physiology and Homeostasis > Flashcards

Flashcards in Physiology: Intro to Human Physiology and Homeostasis Deck (11)
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1
Q

homeostasis

A

maintenance of steady states within narrow ranges within the body co-ordinated by physiological mechanisms

2
Q

a control system must do what to maintain homeostasis

A
  • sense deviations
  • integrate that with other relevant information
  • make adjustments to restore controlled variable to within range
3
Q

two groups of control systems

A
  • intrinsic controls

- extrinsic controls

4
Q

intrinsic control systems

A
  • local control inherent to an organ
5
Q

extrinsic control systems

A
  • regulatory mechanisms initiated outside an organ (nervous and endocrine)
6
Q

feedforward responses

A

in anticipation of change

7
Q

feedback responses

A

after a chnage is detected

8
Q

positive feedback

A

amplifies change

9
Q

negative feedback

A

opposes initial change

10
Q

what are the components of a negative feedback system and their functions

A

sensor - monitor controlled variable
control centre - compares sensors input with set point
effector(s) - makes a response to produce desired effect

11
Q

draw out the flow chart describing negative feedback

A

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