What is hydrophobic and what is hydrophilic on a phospholipid?

The heads are hydrophilic and the tails are hydrophobic

how does osmosis transfer water in relation to the concentration of the SOLUTE?

from a less concentrated solution to a more concentrated one

uptake of another cell or large particle into the cell

Solvent is what dissolves the solute.

Which is the best description of the fluid mosaic model?

Flexible phospholipid bilayer with proteins and carbs dispersed

What type of transport moves sodium & potassium ions?

An active transport protein pump

A cell contains 60% water. Which solution is HYPERtonic to the cell?

30% water, 70% solute, 50% water, 50% solute

At what point in the process of diffusion is dynamic equilibrium reached?

when there is continuous movement but NO NET CHANGE in concentration

Cell taking in liquids with dissolved molecules.

osmosis is the diffusion of?

water through the cell membrane

materials inside the cell are exported out of the cell

What is NOT a function of the cell membrane?

contains genetic info for the cell.

When molecules move from high to low concentration

Which of the following is NOT true of active transport.

Moves material from high to low concentration

The carbohydrate chains on the cell membrane do what?

Are involved in cell to cell communication and recognition.

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Cell membrane Cell Transport

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A #biology #quiz to review the basics of #homeostasis and cell transport.

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Questions 25

Answers

1
Movement of molecules form an area of higher concentration to an area of lower concentration.
Endocytosis
Exocytosis
active transport
Passive transport
2
What is the function of cholesterol in the cell membrane?
cell recognition
allow substances to pass through
maintain structure
allow water to pass through
3
Define Solute
Part of the solution that is being dissolved
A mixture of 2 or more substances
Liquid part of the solution that dissolves
4
Facilitated diffusion involves the use of _______ to help move molecules in or out of the cell.
Doesn't require any help.
Specialized phospholipids
Carrier proteins
ATP
5
Define Isotonic
Solute concentrations are identical
One solute concentration is more than another
One solute concentration is less than another
6
What is hydrophobic and what is hydrophilic on a phospholipid?
The heads and tails are hydrophilic
The heads are hydrophobic and the tails are hydrophilic
The heads and tails are hydrophobic
The heads are hydrophilic and the tails are hydrophobic
7
how does osmosis transfer water in relation to the concentration of the SOLUTE?
from a more concentrated solution to a less concentrated one
from a less concentrated solution to a more concentrated one
8
Moving particles with the concentration gradient requires-
the use of energy
specialized carbohydrates
the pumping of blood
no energy on the cell's part
9
Phagocytosis is the
release of another cell or large particle from the cell
release of water from the cell
uptake of another cell or large particle into the cell
uptake of water into the cell
10
What is a solvent?
Solvent is what dissolves the solute.
Solvent is what is dissolved by the Solute.
11
Which is the best description of the fluid mosaic model?
Rigid phospholipid bilayer
Liquid bubble made of a phospholipid bilayer
Highly permeable membrane that lets anything pass through
Flexible phospholipid bilayer with proteins and carbs dispersed
12
This process moves against a concentration gradient.
facilitated diffusion
diffusion
osmosis
active transport
13
What type of transport moves sodium & potassium ions?
An active transport protein pump
Facilitated diffusion with a protein
An active transport osmosis pump
A passve transport protein pump
14
A cell contains 60% water. Which solution is HYPERtonic to the cell?
30% water, 70% solute
90% water, 10% solute
50% water, 50% solute
60% water, 40% solute
15
What cells contain a cell membrane
Plant cells only
Plant and animal cells only
all eukaryotic cells
Animal cells only
16
At what point in the process of diffusion is dynamic equilibrium reached?
when the rate of change in the solution slows by one half
when the molecules are mixed and STOP MOVING
when there is continuous movement but NO NET CHANGE in concentration
when the movement of molecules STOPS BEING RANDOM
17
What is pinocytosis?
Cell taking in liquids with dissolved molecules.
Cells exporting specific molecules.
Cells expelling products in a transport vesicle.
Cells engulfing dead cells and bacteria.
18
osmosis is the diffusion of?
any liquid through the cell membrane
water through the cell membrane
proteins through the cell membrane
ions through the cell membrane
19
If a cell is placed in a hypotonic solution
Water comes in: cell swells
Cell maintains equallibrum
water comes in :cell shrinks
water leaves: cell swells
20
What is exocytosis?
larger molecules are brought into the cell
fluid is brought into the cell
materials inside the cell are exported out of the cell
water is exported out of the cell
21
Most of the cell membrane is made up of
proteins
phospholipid bilayer
cholesterol
carbohydrates
22
What is NOT a function of the cell membrane?
regulates what goes in and out
protects iternal structures
contains genetic info for the cell.
maintain homeostasis.
23
What is diffusion?
When molecules move from low to high concentration
When molecules sit back and don't move at all
When molecules move randomly but concentration stays the same
When molecules move from high to low concentration
24
Which of the following is NOT true of active transport.
Moves material from high to low concentration
Can use carrier molecules or pumps to move material
Requires energy
Endocytosis and exocytosis are examples
25
The carbohydrate chains on the cell membrane do what?
Help keep the membrane flexible.
Are just ornamental - there is no useful function.
Are involved in cell to cell communication and recognition.
Are involved in transporting molecules across the membrane.

Cell membrane Cell Transport Flashcards | StudBud