Brainscape's Knowledge GenomeTM

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


See full index

Human Biology > Plasma Membrane > Flashcards

Plasma Membrane Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

What is the structure of a plasma membrane?

A

Phospholipid bilayer

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

What are the key components of plasma membrane?

A
  1. Phospholipids
  2. Proteins
  3. Cholesterol
  4. Glycocalyx (carbohydrates)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Describe the structure of a phospholipid.

A

Polar head- phosphate and glycerol
Non polar tail- two chains of fatty acids

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

The Fluid Mosaic Model was proposed by ___________________.

A

Singer and Nicolson

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

Why is the structure of the plasma membrane described as “Fluid” and “Mosaic”?

A

Fluid- phospholipids and proteins can move side by side within the layer.
Mosaic- The pattern formed by the random positioning of proteins,

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

Why is the plasma membrane semi permeable?

A

It allows the passage of non polar molecules and restricts polar molecules.

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

What kinds of substances can move through the cell membrane?

A

Hydrophobic substances.
Small molecules and larger hydrophobic molecules.
eg. CO2, O2 and H20

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

What kinds of substances cannot move through the cell membrane?

A

Hydrophilic substances.
Ions, large hydrophilic molecules and proteins.

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

What are the two types of transportation through the cell membrane?

A

Active and Passive

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

______ transportation requires the expenditure ATP.

A

Active

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

What is the difference between simple diffusion and osmosis?

A

Osmosis is the passive transportation of water

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

True or False: Substance getting transported through simple diffusion have no energy.

A

False. They have natural kinetic energy.

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

_________ is the bursting of the cell due to endosmosis.

A

Cytolysis

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

___________ is the shrinking of the cell due to exosmosis.

A

Plasmolysis

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

What is the difference between flaccidity and plasmolysis?

A

For plasmolysis to occur, the cell must shrink in a hypertonic environment.
Flaccidity of cell is a result of lack of water in an isotonic environment.

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

What is the difference between turgidity and cytolysis?

A

Turgidity is the swelling up of cell, while cytolysis is the bursting of cell in a hypotonic environment.

17
Q

What are the kinds of passive transport?

A

Simple diffusion and facilitated diffusion

18
Q

What is facilitated diffusion?

A

Transportation of substances across the concentration gradient using transport proteins.

19
Q

Amino acids and glucose are transported across the plasma membrane through _____________________.

A

Facilitated diffusion.

20
Q

Sodium potassium pump operates through ______ transportation.

A

Active

21
Q

What are the different kinds of transport proteins?

A

Channel proteins and carrier proteins

22
Q

Aquaporins are _______ transport proteins.

A

Channel

23
Q

True or False: Channel proteins are integral proteins.

A

True.

24
Q

True or False: Carrier proteins change shape or move from one end of the membrane to another to transport substances.

A

True.

25
Q

What are the functions of proteins on the cell membrane?

A
  1. Structural support
  2. Recognition
  3. Transport
  4. Communication
26
Q

___________ is the most common form of endocytosis.

A

Pinocytosis

27
Q

What form of endocytosis is also known as “Cell drinking”?

A

Pinocytosis

28
Q

What form of endocytosis transports dissolved material into the cell?

A

Pinocytosis

29
Q

What form of proteins contain receptors for receptor mediated endocytosis on the cell membrane?

A

Integral

30
Q

What form of endocytosis uses a “Lock and Key” mechanism?

A

Receptor mediated endocytosis

31
Q

Substances that bind to receptors in receptor mediated endocytosis are usually _______.

A

Ligands

32
Q

What form of endocytosis is also known as “Cell eating”?

A

Phagocytosis

33
Q

Food particles, bacteria etc. are transported into the cell through ____________.

A

Phagocytosis

34
Q

The association of phagocytic vacuole and lysosome is called _____________.

A

Phagolysososme

35
Q

Transport of hormones and nerve communication takes place through __________.

A

Exocytosis

Human Biology (5 decks)

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