when molecules move from a high concentration to a low.

the concentration levels are different

Which is true about active transport ?

It moves substances down the concentration gradient

it moves material from high to low concentration

A cell will __________________ in a hypotonic solution.

the size of the cell will not change

the size of the cell will change from large to small and from small to large

How does the cell membrane in the diagram above help to maintain the health of this cell?

By regulating the transport of materials in and out of the cell

By providing support and structure for the cell

By manufactruing protein to provide energy for the cell

By storing food as future energy for the cell

Which of the following best explains the process illustrated in the above diagram?

Transport of molecules across a membrane from a high to low concentration gradient by means of a carrier molecule

Passage of water molecules through a semi-permeable membrane to equalize concentration

Movembent of molecules against a concentration gradient expending energy

Separation of suspended particles from a fluid environment through a porous membrane

which of the following describes a form of active transport?

Large molecules are brought into the cell by wrapping the cell membrane around the molecules to form a vesicle

Oxygen transfers into red blood cells through small gaps in the cell membrane from oxygen-rich environment surround the cells

water moves across the cell membrane from the side with high osmotic pressure towards the side with low osmotic pressure

membrane proteins provide a pathway for larger particles to move across the cell membrane and bring the cell and environment closer to equilibrium

Which of the following describes a form of passive transport?

Membrane proteins provide a pathway for larger particles to move across the cell membrane and bring the cell and environment closer to equilibrium.

Membrane proteins act as an enzyme to break down ATP and use the energy to move particles against the concentration gradient.

Large molecules are brought into the cell by wrapping the cell membrane around the molecules to form a vesicle.

Membrane proteins use the energy of the cell's resting potential to move particles against the concentration gradient.

Which of the following describes osmosis?

Water moves across the cell membrane from the side with high osmotic pressure towards the side with low osmotic pressure.

oxygen transfers into red blood cells through small gaps in the cell membrane from oxygen-rich environment surround the cells

Large molecules are brought into the cell by wrapping the cell membrane around the molecules to form a vesicle.

Membrane proteins provide a pathway for larger particles to move across the cell membrane and bring the cell and environment closer to equilibrium.

How do cells maintain homeostasis without using energy?

Maintaining osmotic balance by taking in or releasing water to match the water concentration of the extracellular environment

Membrane proteins breakdown moklecules to move other molecules from low concentration to high concentration

Membrane proteins use the negative charge inside of the cell to increase the concentration of a chemical inside of the cell

Form the cell membrane around food to create a vacuole that is kept separate from the rest of the cytoplasm while enzymes break down the food.

Due to environmental changes, the water concentration outside of a cell becomes lower than the water concentration inside of the cell. How would the cell most likely respond to maintain homeostasis?

The cell would increase the production of salt

The cell would decrease the production of salt.

How do cells use energy to maintain homeostasis

Form a vacuole around cellular waste and fuse the vacuole with the cell membrane to release the waste into the extracellular environment

Membrane proteins allow chemicals to move from high concentrations to low concentration until equilibrium is reached.

Breakdown sugar to synthesize adenosine triphosphate (ATP) from adenosine diphosphate (ADP) and phosphate

Maintaining osmotic balance by taking in water or releasing water to match the water concentration of the extracellular environment.

Dialysis tubing containing starch solution was placed in a beaker with water/iodine solution. After 10 minutes the water stayed red, but the starch inside the dialysis tube turned black. If dialysis tubing representes a cell membrane in this demonstration, what process is being observed in the changing color of the starch solution?

A semipermeable membrane will diffuse selected molecules. (iodine and not starch)

Iodine cannot pass through a membrane.

A permeable membrane diffuses chemicals in and out of its surface.

Starch can be easily diffused through a membrane

A scientist is investigating cell transprort. She observes molecules being transported into a cell through proteins present in the cell membrane. These proteins do not use energy to transport the molecules. Which of the following best explains the type of cell transport observed by the scientist?

Facilitated diffusion because the proteins were not using energy

Active transport because membrane proteins were used

Diffusion because the molecules were entering the cell.

Osmosis because the molecules were moving against the concentration gradient.

Although diffusion occurs naturally without action from a cell, diffusion benefits cells. How do cells benefit from difusion?

Cells increase concentration of certain molecules

Cells achieve balance with their environment

Cells decrease concentration of certain molecules

What is the function of proteins in the cell membrane?

Facilitate the movement of particles across the cell membrane

Receive chemical signals from other cells to begin a process in the cell

Code for specific structures found in the cell membrane

Create a hydrophobic layer that forms a barrier between the inside and outside of the cell

Which of the following correctly pairs a biomolecule to its function?

Cellulose: makes the cell walls of all plant cells

Enzyme: makes cell membrane's phospholipid bilayer

Cholesterol: Stores genetic information

Glucose: Increase the rate of a reaction

some students used vinegar to dissolve away the shells of three eggs and used these eggs as models of human red blood cells. The students observed the changes in the eggs when they were placed in different solutions. Which statement best describes the role of the cell membrane in this model?

The cell membrane allows water to enter and leave the cell.

The cell membrane is an impermeable barrier that prevents water from entering the cell.

The cell membrane allows solutes to enter the cell, which causes the cell to shrink

The cell membrane removes solutes from the environment.

The cellular process known as the sodium-potassium pump was discovered in the 1950s by Jens Christian Skou, a Danish scientist. This process is a form of active transport that moves three sodium ions to the outside of a cell for every two potassium ions that it moves into the cell. Which of these best explains why energy is needed for active transport?

Ions are moved against the concentration gradient.

Ions are attached to large proteins

Ions are trapped inside the plasma membrane

Which two processes does this diagram most directly model?

Homeostasis and transport of molecules

Energy conversions and synthesis of new molecules

Synthesis of ne molecules and homeostasis

Transport of molecules and energy conversions

1. Which statement best explains the function of the vesicles?

Transporting packaged molecules from the Golgi apparatus to be released out of the cell.

Delivering packaged materials to the Golgi apparatus for protein synthesis

a. Exchanging genetic information between the Golgi apparatuses of separate cells.

Extracting portions of the Golgi apparatus to be regenerated for growth within the cell

Unit 3: Cell Transport & Homeostasis

Authored by Stephanie Bridge

Biology

9th - 10th Grade

NGSS covered

Used 142+ times

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

How does a cell maintain homeostasis?

Regulates what enters and leaves the cell

Flexibility

Protective barrier

Structure and support

The cell membrane is selectively permeable, which means...

All materials can enter and leave the cell

Certain things can enter while others cannot

The cell manually sorts through all materials

Only certain cells can interact with the cell.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is NOT part of the cell membrane?

Lipids

Carbs (there are some carbs to keep the phospholipids from sticking together)

Proteins

Nucleic Acids

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Lipid heads are...

Polar

Nonpolar

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Lipid heads are...

Hydrophobic

Hydrophilic

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many layers is the lipid bilayer?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of transport is shown in the picture?

Osmosis

Diffusion

Endocytosis

Exocytosis

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Unit 3: Cell Transport & Homeostasis

How does a cell maintain homeostasis?

The cell membrane is selectively permeable, which means...

Which of the following is NOT part of the cell membrane?

Lipid heads are...

Lipid heads are...

How many layers is the lipid bilayer?

What type of transport is shown in the picture?

The cell below is in a _________ solution.

The cell below is in a _____________ solution.

The cell below is in a ___________ solution.

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