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The Plasma Membrane > The Plasma Mebrane > Flashcards

The Plasma Mebrane Flashcards

1
Q

How does the plasma membrane maintain homeostasis in a cell?

A

It regulates what enters and exits the cell, helping it have its own environment to survive.

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1
Q

How does the plasma membrane maintain homeostasis in a cell?

A

It regulates what enters and exits the cell, helping it have its own environment to survive.

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2
Q

How is the inside of a cell separate from it’s environment?

A

IT is separate because the the barrier that the plasma membrane creates?

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3
Q

Which component provide basic membrane structure?

A

The phospholipid bilayer

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4
Q

Which phospholipid end is polar?

A

the Head

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5
Q

Which phospholipid head in non-polar?

A

the Tail

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6
Q

Which phosopholipid end in hydrophobic?

A

the Tail

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7
Q

Which phospholipid head is hydrophilic?

A

the Head

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8
Q

Why are there two layers of phospholipids?

A

The tail must be kept away from water and the head face the edges since it is surrounded by a layer water/fluid

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9
Q

Which membrane component controls the cell identity?

A

Carbohydrates

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10
Q

Where are carbohydrates found in the plasma membrane?

A

On the outer layer/surface facing the edges

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11
Q

Which mebrane component controls the fluidity?

A

Cholesterol

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12
Q

Which membrane component controls the cells transports?

A

Protiens

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13
Q

What are the two main types of transport proteins?

A

Channel and carrier protiens

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14
Q

Why is selective permeability nessacary for a cell?

A

It allows the cell to maintain a certain environment that is different from the outside.

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15
Q

Why is homeo stasis inportant?

A

To have conditions sutible for a cell to survive in

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16
Q

Which structure is responsible for maintaining homeostasis?

A

The Plasma Membrane

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17
Q

What is a mosaic?

A

A structure made up of smaller peices

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18
Q

Why is the fluid mosaic model used to describe the plasma membrane?

A

It is made up of many small pieces and moves in a fluid way

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19
Q

Why is the organization of the phospholipids important to its surrounding environment?

A

The inside environment and the outside environ meant has water. Since the tails repel water, the bilayer can react to both

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20
Q

What would happen if a cell could no longer be selectively permeable

A

it will die since it cannot maintain hemostasis

21
Q

What would happen if a cell can not produce cholesterol?

A

The plasma mebrane wil not be fluid and the cell will not maintain homeostasis and die

22
Q

What are the two main types of cellular transport?

A

Active and passive transeport

23
Q

What does passive transport mean

A

Transport with little to no energy

24
Q

What does active transport mean?

A

Transport that uses energy

25
Q

What is concentration gradient?

A

The area between high concentration and low concentration

26
Q

What molecuels are able to defuse in and out the cell?

A

O2 and CO2

27
Q

How do CO2 and O2 travel from in and out the cell?

A

Throught the pances between the phospholipids and the membrane

28
Q

What happens during equalibrium?

A

There is no more diffusion as the concentration is the same everywhere

29
Q

When equalibrium is reached, do the molecules stop moving?

A

No, melecules are always moving

30
Q

What would happen to a cell placed in a high salt solution?

A

The cell would shrivle and lose water to the environment

31
Q

What would we call a strong salt solution?

A

HYPERTONIC

32
Q

What would happen to a cel placed in pure water?

A

It would gain water from the environment and increase in size

33
Q

What would we call a pure water solution?

A

HYPOTONIC

34
Q

What is a solution called when it has the same concentration of water and solutes as the inside of the cell?

A

ISOTONIC

35
Q

How does water get inside of a cell?

A

Through channel proteins

36
Q

How are cells able to get dissolved materials inside?

A

Through any proteins

37
Q

Movement of molecules through a channel protein from high to low concentration is called?

A

FACILITATED DIFFUSION

38
Q

Why is facilitated diffusion passive?

A

Because molecuels are still moving from High concentration to low concentration

39
Q

What are three examples off passive transport?

A

facilitated diffusion, osmosis, and diffusion

40
Q

What type of protein moves molecules from low to high concentration across a membrane?

A

Carrier proteins

41
Q

Why are carrier proteins active transport?

A

It moves from low back to high concentration against the current. Needing energy to make this happen

42
Q

Where does energy come from for active transport?

A

ATP

43
Q

What types of molecules would be brought into or out of a cell using endocytosis or exocytosis?

A

Molecules, proteins, and cells too large for carrier proteins

44
Q

Are osmosis and diffusion passive or active?

A

Passive

45
Q

What are three examples active transport?

A

Endocytosis, exocytosis, and carrier proteins

46
Q

How is facilitated diffusion different from active transport using carrier proteins?

A

FD: high to low concentration
CP: Low to high concentration

47
Q

Why is active transport and energy usinng process?

A

Because it goes against the constant gradient, and in exocytosis and endocytosis the cell had to change shape

48
Q

What adaptations might protist living in the hypertonic Great Salt Lake have?

A

They will have the adaptation to the salty water

49
Q

How does the plasma membrane maintain homestasis in a cell?

A

It regulates what goes in and out and helps separate the conditions from inside the cell and outside the cell

The Plasma Membrane (1 decks)

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