Lecture 1

Question 1

Single-celled organisms circulation:

Answer 1

Primarily done via diffusion.

Question 2

Multi-cellular organism circulation:

Answer 2

1. Cells are not in direct contact with the environment.
2. Have specialized transport systems.
3. No cell is closer than 10 um from capillary.

Question 3

What happens as the diffusion distance increases?

Answer 3

The pressure gradient will become smaller, and it will take longer.

Question 4

Blood flow (q.)

Answer 4

1. CO = blood flow = Q.
2. CO = SV x HR
   3.

Question 5

Continous exposure to fresh circulating blood requires?

Answer 5

1. Blood flow (q.) thru tissues
2. Pressure and resistance.
3. ideal chemical composition
4. minimal Diffusion distances

Question 6

60-40-20 rule:

Answer 6

total body water weight is:
1. 60% of weight is water.
2. 40% intracellular fluid.
3. 15% is Interstitial compartment.
4. 5% is Plasma compartment
5. Interstitial and plasma compartment make up the extracellular stuff.