Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CELS191 > Lecture 4 > Flashcards

Lecture 4 Flashcards

1
Q

5 things that a cell must do…

A 
Generate required energy 
Manufacture cellular materials 
Obtain raw materials 
Remove waste 
Control mechanisms
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Functions occur … within the cel

A

Simultaneously

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Each process requires…

A

Specific conditions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Purpose of organelles

A

Provide special conditions, keep incompatible processes apart, allows concentration of specific molecules and formation of a conc. gradient, package substances for transport and export

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Plasma membrane is….

A

Semipermeable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Hydrophobic…

A

Tails

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Hydrophilic…

A

Heads

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Composition of the fatty acids in membrane affects its…

A

Fluidity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Unsaturated tails are…

A

Kinky

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Saturated tails…

A

Pack together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Unsaturated fatty acids make the membrane more or less fluid

A

More

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Cholesterol is a…

A

fluidly buffer, resisting changes in membrane fluidity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

At high temps cholesterol…

A

Stabilises lipid molecules so movement is restrictive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

At low temps cholesterol…

A

Hinders close packing, lowering temp at which membrane solidifies

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What controls movement of substances in and out of cell

A

Plasma membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Passive, occurs by conc gradient and brings organelles in equilibrium with surroundings, movement of hydrophobic molecules

A

Simple diffusion

17
Q

Uses channels and carriers, movement of hydrophilic molecules

A

Facilitated diffusion

18
Q

Uses energy, against conc gradient, allows difference between internal and external environments of the cell

A

Active transport

19
Q

In directional, movement of one molecule actively to create a conc gradient to move another molecule

A

Co-transport

20
Q

Role of membrane proteins

A 
Transport
Recognition
Joining cytoskeleton to ECM 
Message relay/signalling
Intercellular joining

CELS191 (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions