The Scientific Method

Question 1

Homeostasis

Answer 1

Homeo=similar, stasis=condition. An optimum internal environment is needed for cells to function correctly, prevent disease and maintain health. Increased energy demand requires multiple systems to integrate to maintain this environment.

Question 2

Negative feedback control system

Answer 2

When conditions change from a set point negative feedback returns conditions to the set point.

Question 3

Feedforward control

Answer 3

Additional receptors allow the system to anticipate change and activate a response earlier.

Question 4

Plasma

Answer 4

The fluid component of blood

Question 5

Interstitial fluid

Answer 5

Bathes the cells

Question 6

Extracellular fluid

Answer 6

Comprised of plasma and interstitial fluid (1/3 fluid content)

Question 7

Intracellular fluid

Answer 7

This fluid is located within the cell membrane and contains water, electrolytes and proteins. (2/3 fluid content)

Question 8

Capillary wall

Answer 8

Separates plasma from ISF and is permeable to everything except plasma proteins

Question 9

Dilution Principle

Answer 9

V(volume)=m(amount of tracer)/c(concentration of tracer)

Question 10

Indirect measurements for body fluid composition

Answer 10

ISF=ECF/Pv

ICF=TBW-ECF