Section 2 Lecture 1

Question 1

About _#__ cells in the body:

Answer 1

37 trillion

Question 2

How much blood do we have in body?

Answer 2

about 10 L

Question 3

Diffusion time:

Answer 3

(distance^2)/ diffusion constant (10^-5 for most small molecules in H2O)

Question 4

___ is slow and ubiquitous flow, while ___ is discrete and fast.

Answer 4

diffusion, convention

Question 5

What is convection driven by?

Answer 5

fluid pressure gradient

Question 6

Flow =

Answer 6

pressure gradient/resistance

Question 7

Poiseuille’s law of convection:

Answer 7

Q = 1/R(P(a)-P9(v))

Question 8

Diffusion is driven by:

Answer 8

thermal energy

Question 9

Nick’s Law of Diffusion:

Answer 9

Jx = Px * ([X]c-[X]if)

Question 10

The circulation functions to integrate:

Answer 10

the transport phenomena of the 4 exchange epithelia

Question 11

Exchange bw the circulation and the interstitial fluid is via:

Answer 11

convection

Question 12

Blood flow in the body is adjusted to match:

Answer 12

the rate of metabolism

Question 13

flow supply is equal to the flow demand at this point:

Answer 13

flow equilibrium

Question 14

What is the flow demand set by?

Answer 14

metabolism

Question 15

Arteriole resistance is essentially proportional to:

Answer 15

1/metabolism (check)

Question 16

Flow =

Answer 16

pressure gradient/ resistance

Question 17

Range of blood flow per minute:

Answer 17

5 to 25 L

Question 18

How long does it take for your body to change blood flow rate in response to changes in metabolic needs?

Answer 18

tens of seconds

Question 19

Px=

Answer 19

p (density), g (gravity) h (height)

Question 20

a cell can maintain functionality of diffusion at this PM width:

Answer 20

100 microns

Question 21

Diffusion is driven by:

Answer 21

thermal energy (check)

Question 22

Flow is directly proportional to:

Answer 22

pressure gradient

Question 23

Flow is inversely proportional to:

Answer 23

resistance

Question 24

Flux =

Answer 24

permeability X driving force (thermal energy expressed in concentration gradient/chemical potential

Question 25

Is diffusion of convection used for exchange bw exchange epi and circulation?

Answer 25

diffusion

Question 26

Is diffusion of convection used for exchange bw circulation and interstitial fluid?

Answer 26

Both

Question 27

How is metabolism affected if resistance goes down?

Answer 27

Metabolism goes up

Question 28

Convective flow must match

Answer 28

metabolism

Question 29

In an overinflated balloon the pressure inside is proportional to:

Answer 29

wall tension

Question 30

Pressure gradient is proportional to:

Answer 30

difference in volume

Question 31

What creates the pressure gradient within our cardiovascular system?

Answer 31

the heart

Question 32

static volume is AKA:

Answer 32

stress volume

Question 33

Flow in to arterioles, out vs. in:

Answer 33

fast flow out-slow flow in

Question 34

T or F? Resistance is infinite.

Answer 34

T (Infinite resistance would mean full obstruction I assume)

Question 35

Volume and pressure increase ____ when the pump is on one valve is closed, whereas the volume and pressure both decrease ___ when the valve is later opened after the R tube has additional water build up.

Answer 35

lateral, exponential rate ( left half of the letter U)

Question 36

How does the flow increase graphically when the pump is on and the valve is open?

Answer 36

left half of upside down U - flow is fastest when the pump is initially turned on (greatest slope)

Question 37

When is the pressure gradient generated in our cardiovascular system?

Answer 37

when the pump transfers static volume from the venous reservoir to the arterial reservoir.