WorksheetsUnit 4 Homeostasis and Transport
Total questions: 44
Worksheet time: 22mins
What does the term “homeostasis” mean?
respond to their environment.
maintain a stable internal environment.
made up of units called cells.
based on a universal genetic code.
What is the function of a cellular membrane?
Keep structure and support for the cell
Help regulate homeostasis and the flow of materials in and out of the cell
Produce proteins for the cell
control the activity of the cell
The cell membrane is made up of
rigid cellulose outer layer
Phospholipid bilayer
triglyceride molecules
complex of enzymes
The tails of the cell membrane are
Hydrophobic, and they face towards in excellular fluid and intracellular cytoplasm
Hydrophobic, and they face towards the middle of the membrane
Hydrophilic, and they face towards in excellular fluid and intracellular cytoplasm
Hydrophilic, and they face towards the middle of the membrane
The heads of the cell membrane are
Hydrophobic, and they face towards in excellular fluid and intracellular cytoplasm
Hydrophobic, and they face towards the middle of the membrane
Hydrophilic, and they face towards in excellular fluid and intracellular cytoplasm
Hydrophilic, and they face towards the middle of the membrane
The cell membrane is considered to be a fluid mosaic because
it is flexible and has numerous proteins and carbohydrates embedded within the bilayer
it is flexible and has numerous acids and carbohydrates embedded within the bilayer
it is rigid and has numerous proteins and carbohydrates embedded within the bilayer
The lipid that helps keep the cell fluid.
Glycogen
Cellulose
Starch
Cholesterol
Membrane proteins function to
help to transport ions and polar molecules into and out of the cell.
help to stabilize and shape the membrane.
allow the cell to be recognized by other cells.
All of the above
Proteins with a tube like opening that allow large particles in and out of the cell.
Channel protein
Integral protein
Peripheral protein
Carrier protein
Proteins that can grab material on one side of the membrane and release it on the other.
Channel protein
Integral protein
Peripheral protein
Carrier protein
This is evidence that chloroplasts and mitochondria were once free-living organisms, “captured” by a primitive eukaryotic cell. This is referred to as…
two membrane theory.
eukaryotic theory.
chloro-mitochondrial theory.
endosymbiotic theory.
Membranes make up the nucleus, endoplasmic reticulum (ER), and Golgi apparatus inside the cell. These are sometimes considered a single, interconnected system called the…
cell membrane interior.
endomembrane system.
interconnected cellular highway.
Which of the following are also made of a bilayer membrane?
Endoplasmic Reticulum
Nuclear Membrane
Golgi Complex
All of the above
To reach the Golgi apparatus, substances from the ER are packaged into ____________, sections of membrane that bud off the ER and form sacs that move through the cytoplasm and fuse with the membrane of the Golgi apparatus.
Proteins
Ribosomes
Vesicles
Lysosomes
In the above diagram, what does 1 represent?
A phospholipid
A cell membrane
Heads
Tails
In the above diagram, what is 2 pointing to?
Hydrophobic head
Hydrophobic tails
Hydrophilic head
Hydrophilic tails
In the above diagram, what is 3 pointing to?
Hydrophobic head
Hydrophobic tails
Hydrophilic head
Hydrophilic tails
Diffusion and Osmosis do not use cellular energy, therefore they are ____________ processes.
Active
Passive
Metabolic
Living
Cellular transport is regulated by cell membranes. This happens because cell membranes are __________________________.
Selectively permeable
Impermeable
Fully permeable
In passive transport, materials always move from areas of _____________ concentration, to areas of _____________ concentration.
low, high
low, low
high, low
high , high
When a substance has equal concentrations on both sides of a membrane it will reach ____________ and the molecules will ____________ moving.
hypertonic, keep
hypotonic, stop
isotonic, keep
isotonic, stop
The movement of water to reach equilibrium
Osmosis
Diffusion
Facilitated diffusion
Ion channels
Cellular energy required for active transport comes directly in the form of _________.
NADPH
ATP
Lipids
Glucose
____ brings materials into the cell while _______ brings materials out of the cell.
Exocytosis for both
Endocytosis, exocytosis
Exocytosis, endocytosis
Endocytosis for both
Macromolecules are often too large to fit through the cell membrane or membrane proteins. Cells can transport these molecules by packaging them in small membrane sacs called _____________.
Lysosomes
Vesicles
Ribosomes
Golgi bodies
The movement of large quantity of solutes or liquid into the cell
Pinocytosis
Phagocytosis
The movement of solids across a membrane
Pinocytosis
Phagocytosis
Thermoregulation is the regulation of
Water
Glucose
Oxygen, carbon dioxide
Temperature
Osmoregulation is the regulation of
Water
Glucose
Oxygen, carbon dioxide
temperature
If a saltwater fish is placed in freshwater, what will happen?
Nothing, it is happy.
Its’ cells will start taking in large amounts of water
Its’ cells will start losing large amounts of water
Gases like oxygen and carbon dioxide move across the cell membranes by:
Endocytosis
Osmosis
Diffusion
Facilitated diffusion
These plants cells
lead a happy life in an isotonic solution
burst open from exposure to a hypertonic solution
shrank from the cell walls from exposure to a hypertonic solution
shrank from cell walls because plants like a hypotonic solution
What is the image above an example of
Osmosis
Diffusion
Facilitated diffusion
Active transport
What do the blue structures represent in the diagram above?
Proteins
Phospholipids
Carbohydrates
Solutes
The following image show a white blood cell engulfing a virus (stage 1) and merging a lysosome with it (stage 3) so that it can be destroyed by hydrolytic enzymes (stage 3), thus protecting you from infection. This is an example of
Facilitated diffusion
Pinocytosis
Phagocytosis
osmoregulation
Select all that apply: Which processes are done by Passive Transport?
Diffusion
Osmosis
Facilitated diffusion
Ion channels
Select all that apply: Which processes are done by Active Transport?
Sodium potassium pump
Endocytosis - Pinocytosis and Phagocytosis
Exocytosis
A cell in a hypotonic solution will
swell
shrink
stay the same size
impossible to tell
A cell in an isotonic solution will
swell
shrink
stay the same size
impossible to tell
White blood cells take in and destroy invaders using:
A. Exocytosis
B. Facilitated Diffusion
C. Diffusion
D. Endocytosis
What is the image above an example of
Solute is moving from high to low concentration or down the gradient
Solute is moving from low to high concentration or against the gradient
equilibrium is being maintained
water is moving across the membrane
Salt water is an example of a(n) _____________ solution
isotonic
hypotonic
hypertonic
balanced
Distilled (pure) water is an example of a(n) _____________ solution
isotonic
hypotonic
hypertonic
balanced
Animal cells prefer to live in a(n) _____________ solution
isotonic
hypotonic
hypertonic
balanced
