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WorksheetsCellular Transport
Total questions: 40
Worksheet time: 21mins
What is homeostasis?
The process of how cells self destruct
Process of maintaining a stable environment inside a cell or entire organism.
The allowing of certain substances but not other substances.
The decreasing temperature of the human body due to the shriveling of cells
Define concentration gradient
A measurement of how much the concentration of a substance changes across a distance.
Requires no energy by the cell to move from one place to another
Requires extra energy (ATP) to be spent to bring materials into the cell or to expel materials
Amount of solutes per solvent.
What maintains homeostasis mainly?
The nucleus determines what the cell should do
The ribosomes because they are in charge off making proteins
The cell wall guards and prevents anything that should and shouldn't enter
The cell membrane as it determines what goes in and out of a cell
What process would happen if your body got overheated?
Nothing
Negative feedback
Positive Feedback
Molecular Pump
What is negative feedback?
A cell responds opposite of the initial change. The output is decreased or inhibited
A cell or organism changes too much causing it to die
The body prevents any substances from leaving cells.
A cell amplifies the initial change until the change stops
Which is not an example of negative feedback? (Click all that apply)
Body temperature regulation
Childbirth
Regulating glucose
Blood sugar
What is the order of the negative feedback process?
Control, effector/response, sensor, stimulus
Sensor, stimulus, control effector/response
Stimulus, sensor, control, effector/ response
Sensor, control, stimulus, effector/response
Define positive feedback
A cell amplifies the initial change , promotes change instead of reversing it to speed up the effecct
The cell releases too many substances for the body to handle = death
The cell responds when the body does something beneficial to itself
The body releases serotonin and other happy inducers
Choose all examples of positive feedback
Blood clotting
Childbirth
Digestion
Blood pressure
What is significant about the cell membrane, referring to cell transport
It is thin
It contains DNA
All cells have a cell membrane
It is selectively permeable
Select the right one about the structure of the cell membrane
Polar heads: hydrophobic
Non polar tails:
hydrophobic
Polar Heads: hydrophobic Nonpolar tails: hydrophillic
Polar Heads: hydrophillic
Non polar tails:
Hydrophobic
Polar heads: hydrophilic Nonpolar tails:
Hydrophillic
Define passive transport
Requires no extra energy by the cell as molecules move with the concentration gradient
Requires extra energy (ATP) by the cell as it move against the concentration gradient
A cell amplifies the initial change in order to speed up the effect.
A cell responds opposite the initial change. The output is decreased or inhibited
Define active transport
Requires no extra energy by the cell as molecules move with the concentration gradient
Requires extra energy (ATP) by the cell as it move against the concentration gradient
A cell amplifies the initial change in order to speed up the effect.
A cell responds opposite the initial change. The output is decreased or inhibited
Define solution
Amount of solute dissolved in solvent. Symbol- []
What gets dissolved
What does the dissolving
Uniform mixture of two or more substances
Define solute
Amount of solute dissolved in solvent. Symbol- []
What gets dissolved
What does the dissolving
Uniform mixture of two or more substances
Define solvent
Amount of solute dissolved in solvent. Symbol- []
What gets dissolved
What does the dissolving
Uniform mixture of two or more substances
Define concentration
Amount of solute dissolved in solvent. Symbol- []
What gets dissolved
What does the dissolving
Uniform mixture of two or more substances
The spreading out of molecules across a membrane until both sides of the membrane are equally concentrated. Moves down the concentration gradient
Facilitated Diffusion
Osmosis
Molecular Pump
Diffusion
Oxygen (O2) and Carbon Dioxide (CO2) use what type of transport?
Endocytosis
Osmosis
Molecular Pump
Diffusion
How are facilitated diffusion and diffusion different? Select all that apply
Facilitated diffusion moves through the cell membrane while diffusion requires a protein channel
Diffusion moves through the cell membrane easily while facilitated diffusion requires a protein channel
Diffusion moves gases, facilitated diffusion moves things that can't normally pass through
Facilitated diffusion moves gases and diffusion moves substances that can't normally be moved
A transport protein acts as a protein channel to move molecules that cannot normally pass the cell membrane. It goes down the concentration gradient.
Molecular Pump
Facilitated Diffusion
Diffusion
Osmosis
NaCl and C6H12O6 is moved through what process?
diffusion
facilitated diffusion
molecular pump
exocytosis
What does osmosis move?
Water
Glucose
Gases
Large particles
The diffusion of water across the cell membrane, moves down the concentration gradient.
Exocytosis
Endocytosis
Osmosis
Facilitated Diffusion
What is a hypertonic solution
A higher concentration of solutes compared to the cell environment, water exits cell and cell shrivels
A lower concentration of solutes compared to the cell environment, water moves into cell and cell swells
A measurement of how much the concentration of a substance changes across a distance.
Identical water concentrations to what is found in the cells cytoplasm, cell doesn't change
What is a hypotonic solution
A higher concentration of solutes compared to the cell environment, water exits cell and cell shrivels
A lower concentration of solutes compared to the cell environment, water moves into cell and cell swells
A measurement of how much the concentration of a substance changes across a distance.
Identical water concentrations to what is found in the cells cytoplasm, cell doesn't change
What is an isotonic solution
A higher concentration of solutes compared to the cell environment, water exits cell and cell shrivels
A lower concentration of solutes compared to the cell environment, water moves into cell and cell swells
A measurement of how much the concentration of a substance changes across a distance.
Identical water concentrations to what is found in the cells cytoplasm, cell doesn't change
What is NOT TRUE about active transport
Not all substances can move freely in and out of the cell
Molecules must be pushed uphill against concentration gradient
Substances do not require more energy to be moved
Substances move from low concentration to high concentration
Molecular Pumps:
A cells uses energy to export large amounts of material out of cell using a vesicle
When a cells uses energy to pump ions across the membrane through protein channels
Control blood pressure by regulating blood volume.
A cell uses energy to import large amounts of materials into the cell using a vesicle
Endocytosis
A cells uses energy to export large amounts of material out of cell using a vesicle
When a cells uses energy to pump ions across the membrane through protein channels
Control blood pressure by regulating blood volume.
A cell uses energy to import large amounts of materials into the cell using a vesicle
Exocytosis
A cells uses energy to export large amounts of material out of cell using a vesicle
When a cells uses energy to pump ions across the membrane through protein channels
Control blood pressure by regulating blood volume.
A cell uses energy to import large amounts of materials into the cell using a vesicle
Ca2+, K+, Cl-, Na+:
osmosis
facilitated diffusion
molecular pump
diffusion
White blood cells engulf bacteria to fight infections:
Diffusion
Osmosis
Exocytosis
Endocytosis
Nerve cells release neurotransmitters to pass signals to the brain
Diffusion
Facilitated diffusion
Exocytosis
Endocytosis
What are examples of facilitated diffusion
Fighting off bacteria
Regulating blood sugar
Controlling blood pressure by regulating blood volume
Ensures every cell is oxygenated.
What are examples of exocytosis
Fighting off bacteria
Sending signals to the brain
Controlling blood pressure by regulating blood volume
Muscle contraction and nerve signal conduction
What are examples of endocytosis
Fighting off bacteria
Sending signals to the brain
Controlling blood pressure by regulating blood volume
Muscle contraction and nerve signal conduction
What are examples of osmisis
Fighting off bacteria
Sending signals to the brain
Controlling blood pressure by regulating blood volume
Muscle contraction and nerve signal conduction
What are examples of osmosis
Ensures every cell is oxygenated
Regulating blood sugar
Controlling blood pressure by regulating blood volume
Muscle contraction and nerve signal conduction
What are examples of molecular pumps
Ensures every cell is oxygenated
Regulating blood sugar
Controlling blood pressure by regulating blood volume
Muscle contraction and nerve signal conduction
