WorksheetsHomeostasis and transport review
Total questions: 32
Worksheet time: 31mins
All of the following are methods of passive transport EXCEPT?
Endocytosis
Simple diffusion
Facilitated diffusion
Osmosis
What does it mean when we say that the cell membrane is semipermable?
Only certain substances can move easily through the cell membrane.
Nothing can get through the cell membrane
Everything can get through the cell membrane
Only semi trucks can get through the cell membrane
Diffusion depends on?
ATP
Concentration gradient
Sodium potassium pump
Air movement
All of the following are examples of active transport EXCEPT?
Exocytosis
Sodium potassium pump
Facilitated diffusion
Phagocytosis
When water moves from a greater concentration to a lesser concentration it is called?
Osmosis
Facilitated diffusion
Exocytosis
A water slide
Why is the cell membrane refered to as a lipid bilayer?
It is made of two different types of fats
It is shaped like a circle
It is made of lipids and has two layers
The head of a phospholipid is?
Hydrophobic
Hydrophylic
The tails of a phospholipid are?
Hydrophobic
Hydrophylic
What substances move through the cell membrane easily by simple diffusion?
Polar molecules
Small nonpolar molecules
Ions
Large macromolecules
Substances will continue to move through the cell membrane by simple diffusion until this happens.
Equilibrium is reached
The substances are unequal on both sides
It will not stop it keeps going non-stop
What type of passive transport uses transport proteins to help substances through the plasma membrane?
Facilitated diffusion
Simple diffusion
Active transport
Exocytosis
The term hypotonic describes the osmotic pressure as being?
lower concentration of dissolved substances outside the cell and higher inside the cell
The concentration of dissolved substances are equal on both sides
Has a greater concentration of dissolved substances outside the cell.
A hypotonic solution will cause a cell to?
Shrink
Stay the same
Swell and burst
Dance
The term isotonic describes the osmotic pressure as being?
lower concentration of dissolved substances outside the cell and higher inside the cell
The concentration of dissolved substances are equal on both sides
Has a greater concentration of dissolved substances outside the cell.
The term hypertonic describes the osmotic pressure as being?
lower concentration of dissolved substances outside the cell and higher inside the cell
The concentration of dissolved substances are equal on both sides
Has a greater concentration of dissolved substances outside the cell and less inside the cell.
Active transport moves materials from ______ concentration gradient.
high to low
low to high
within the cell
Which of these is how a cell maintains homeostasis?
cell controls what enters & leaves the cell
cell uses a protective barrier
cell membrane is flexible
cell membrane is used for structure & support
Molecules moving from high concentration areas to low concentration areas is -
active transport
passive transport
bulk transport
What are the main components of the cell membrane?
DNA, transport proteins, sugar
Carbohydrates, phospholipids, water
Phospholipids, transport proteins, cholesterol
Proteins, water, DNA
Why do cells change in size and shape in different concentration solutions?
The cells are consuming energy.
The cells are absorbing nutrients from the solution.
Water is entering or leaving the cells.
The cells are undergoing mitosis.
Which of the following types of cell transport uses energy?
Facilitated diffusion
Simple diffusion
Passive transport
Active transport
How do membrane proteins help with cell transport and homeostasis?
They act as defense against foreign bacteria and viruses
They produce energy needed for transport
They hold the phospholipid bilayer together
They help maintain the concentration gradient of solutes, and provide passage for polar molecules.
What is the function of the cell membrane?
Control the passage of material into and out of the cell
Communicate with neighboring cells
Protect the cell
All of the above
What is homeostasis?
The process of making energy in a cell
The process of maintaining an internal balance while responding to external changes
The process of producing new and healthy cells
The process of converting DNA code into proteins in a cell
Passive transport aided by transport proteins that does not require energy / ATP.
Diffusion
Osmosis
Facilitated Diffusion
Pinocytosis
A type of active transport in which the cell membrane secretes molecules out of the cell by the fusion of vesicles to the plasma membrane.
Crenation
Exocytosis
Endocytosis
Plasmolysis
Occurs when a cell takes in molecules by forming new vesicles around substances outside the membrane and bringing them in to the plasma membrane.
Crenation
Exocytosis
Endocytosis
Plasmolysis
Process in which extensions of cytoplasm surround and engulf large particles of food particles and take them into the cell.
Crenation
Phagocytosis
Pinocytosis
Plasmolysis
A type of endocytosis in which the cell "gulps" droplets of fluid into tiny vesicles.
Crenation
Phagocytosis
Pinocytosis
Plasmolysis
Homeostasis depends on what?
Protein structure
Feedback loops
Carbohydrates
Lipids
The negative feedback loop works to bring things back to their normal levels.
True
False
The positive feedback loop works to bring things back to their normal levels.
True
False
