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15 questions
A phospholipid has two parts. What are they called?
Hydrophilic Head, Hydrophobic Tail
Hydrophobic Head, Hydrophilic Tail
Controls the passage of materials inside and outside of the cell.
Cellmembrane
Cytoplasm
Cell wall
Endoplasmic reticulum
Which of the following is a function of the cell membrane?
breaks down lipids, carbohydrates, and proteins from foods
stores water, salt, proteins, and carbohydrates
synthesizes proteins and other macromolecules
regulates the movement of materials into and out of the cell
Which term describes the relatively constant internal physical conditions of an organism?
cell specialization
homeostasis
permeability
unicellularity
Which of the following is a true statement?
Cells are small because it allows a faster rate of chemical exchange.
Cells are small because it allows a slower rate of chemical exchange.
Cells are large because it allows a faster rate of chemical exchange.
Cells are large because it allows a slower rate of chemical exchange.
Which of the following molecules pass easily through the cell membrane, requiring little extra help or energy? Select all that apply.
sodium
glucose
oxygen
carbon dioxide
Which of the following molecules don't pass easily through the cell membrane, requiring extra help or input of energy?
sodium
glucose
oxygen
carbon dioxide
The ability to allow only certain molecules into or out of the cell.
Semipermeability
Permeability
Impermeability
Unpermeability
Why is the cell membrane like a window screen?
They both allow everything to pass through.
Neither allow anything to pass through.
They both allow certain things to pass through, while blocking the passage of others.
They are not similar to each other at all.
Which of the following is the function of the cell membrane? Select all that apply.
Provides instructions to the cell and other organelles.
Regulates compounds in and out fo the cell.
Allows cells to communicate and interact with other cells.
Breaks down wastes and other compounds.
Protects the cell from its environment.
Which of the following are embedded in the phospholipid bilayer and help substances pass through?
lipids
proteins
cholesterol
carbohydrates
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