Biol 441 exam 3 Flashcards Preview

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Flashcards in Biol 441 exam 3 Deck (23):
1

Tension
(Scalar? Vector? or x order tensor?)

2nd order tensor

2

Strain
(what is it?)

the percentage of a material that has lengthened or shortened in response to stress applied to it

3

Strain
(Scalar? Vector? or x order tensor?)

2nd order tensor

4

Elastic resistance
(Scalar? Vector? or x order tensor?)

4th order tensor

5

Elastic resistance
(what is it?)

ratio of stress to strain

6

Stress
(what is it?)

mechanical force per cross sectional area (f/m^2)

7

Young's modulus
(what is it? what is it large in? small in?)

the slope of the curve of stress vs. strain
large in steel
small in rubber

8

Hooke's Law
(what is it?)

the linear proportionality of stress to strain

9

When is something Hookeian?

when it's Young's modulus is constant

10

Curvature
(what is it?)

the angular change of the tangent line per distance

11

Radius of Curvature
(what is it?)

1/curvature

12

Curvature
(Scalar? Vector? or x order tensor?)

2nd order tensor

13

What is a 1st order tensor?

a vector

14

What is a 0th order tensor?

a scalar

15

Equation relating pressure, tension, and curvature

P = T * C

16

Tension is the same thing as...?

tensile stress

17

Electro-osmotic pressure
(Scalar? Vector? or x order tensor?)

scalar

18

Auxin's effect on plants (5)

-they bend towards light
-the have greater elongation in the dark
-they bend upwards relative to gravity
-branching is inhibited near growing tips
-roots sprout at the bottom of the plant

19

Auxin does what to shoot sprouting?

inhibits it

20

Auxin does what to root sprouting?

encourage it

21

The better organic chemistry name for auxin:

indole acetic acid

22

types of meristems:

-shoot meristem
-root meristem
-lateral meristem
-floral meristem

23

Examples of apoptosis

-tail destruction in tadpoles
-destruction of cells between the lips and gums
-destruction of the cells between the fingers and toes
-destruction of cells of the neck to narrow it
-"necrotic zones" (should be apoptotic) in anterior and posterior limbs to narrow them
-131 cells (mostly nerve) in C. elegans
- >50% of motor and sensory nerves
-destruction of anti-self T-cells and B-cells
-destruction of virus-infected cells
-destruction of cells by chemotherapy