Flashcards in Section 2 Lecture 1 Deck (37):

1

## About _#__ cells in the body:

### 37 trillion

2

## How much blood do we have in body?

### about 10 L

3

## Diffusion time:

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

4

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

### diffusion, convention

5

## What is convection driven by?

### fluid pressure gradient

6

## Flow =

### pressure gradient/resistance

7

## Poiseuille's law of convection:

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

8

## Diffusion is driven by:

### thermal energy

9

## Nick's Law of Diffusion:

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

10

## The circulation functions to integrate:

### the transport phenomena of the 4 exchange epithelia

11

## Exchange bw the circulation and the interstitial fluid is via:

### convection

12

## Blood flow in the body is adjusted to match:

### the rate of metabolism

13

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

### flow equilibrium

14

## What is the flow demand set by?

### metabolism

15

## Arteriole resistance is essentially proportional to:

### 1/metabolism (check)

16

## Flow =

### pressure gradient/ resistance

17

## Range of blood flow per minute:

### 5 to 25 L

18

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

### tens of seconds

19

## Px=

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

20

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

### 100 microns

21

## Diffusion is driven by:

### thermal energy (check)

22

## Flow is directly proportional to:

### pressure gradient

23

## Flow is inversely proportional to:

### resistance

24

## Flux =

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

25

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

### diffusion

26

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

### Both

27

## How is metabolism affected if resistance goes down?

### Metabolism goes up

28

## Convective flow must match

### metabolism

29

## In an overinflated balloon the pressure inside is proportional to:

### wall tension

30

## Pressure gradient is proportional to:

### difference in volume

31

## What creates the pressure gradient within our cardiovascular system?

### the heart

32

## static volume is AKA:

### stress volume

33

## Flow in to arterioles, out vs. in:

### fast flow out-slow flow in

34

## T or F? Resistance is infinite.

### T (Infinite resistance would mean full obstruction I assume)

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.

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

36

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

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

37