Chapter 26.1- 26.2 Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

How do eukaryotes show simple multicellularity??

A
  • filaments
  • hollow balls
  • sheets of little differentiated cells
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Components of a simple multicellularity

A
  • Cell adhesion: uses adjacent molecules to stick together
  • a full range of functions: in case the cell dies
  • direct contact with the environment
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

advantages of multicellularity organisms?

A
  • One selective helps organisms avoid getting eaten.
  • able maintain the same position
  • flagella helps direct food to the cell
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Disadvantages of multicellularity?

A
  • cancer can be a result of cells non cooperating because cells use nutrition for personal cell and not for the growth of organism
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Complex multicellular organisms share three main functions

A
  1. highly developed mechanism for cohension
  2. Display specialized structures that allow cells to communicate with each other
  3. complex patterns of tissue differentiation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

When is diffusion effective?

A

Only over a short distance

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

When a cell is too big or thick

A

it limits the amount of oxygen that can enter the cell

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

How do sponges overcompensate for their size?

A

they use pores and canals in order to still gain access to seaweed

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

How do humans overcompensate for their size?

A

We circumvent diffusion by actively pumping
oxygen-rich blood through our bodies.

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

How do multicellular organisms overcompensate for their size?

A
  • bulk flow for humans= blood vessels/ the cirulatory system
  • bulk flow for animals= vassular tissues
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Bulk flow

A

is how molecules move through
organisms at rates beyond those possible by diffusion across a
concentration gradient

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