Physiology test 2: Homeostasis

Whats the difference between anatomy physiology and pathophysiology

Anatomy- structure

Physiology- function

Pathophysiology- study of function of body parts in disease

what are the 3 body fluid compartments?

1- intracellular- within cell- 67% of all water in body

2-Plasma part of extracellular fluid- fluid portion of blood in which the cells are suspended- 7% of all water in body

3- Interstitial fluid- part of extracellular fluid, fluid lies around and between cells 26% pf total body water

what percent of your body is water

50-60%

Homeostasis?

automatic process of maintaining a balanced environment even though the external environment changes

What happens when homeostasis is disturbed?

body faced with overproducing/restricting 

What are the regulated variables in homeostasis?

have ideal set points and this value can vary dynamically within certain range

What are sensors in homeostasis?

variables monitored by specialized sensors that trigger responses to return to an acceptable range

what is the homeostatic steady state?

System in which a variable is not changing, but requires energy to maintain the variable around a set point (115 degrees outside 60- degrees inside)

what is homeostatic equilibrium?

System in which a variable is not changing, but no energy required (68 degrees outside and inside room)

What is negative feedback?

The regulated variable triggers a response opposite to the direction of the original change— happens at organ, cellular or molecular level

What is positive feedback?

An initial change in a variable leads to a greater change on that variable in the same direction (ie. blood clotting)

Last thing is review examples from paket on positive vs negative feedback:)

:)))))) you got that girls