Cell Transport Flashcards
(31 cards)
As a result of diffusion, the concentration of many types of substances:
A. Always remain greater outside of a membrane.
B. Eventually becomes balanced on both sides of a membrane.
C. Always remains greater inside a membrane.
D. Becomes imbalanced on both sides of a membrane.
B; Eventually becomes balanced on both sides.
Only eukaryotic cells have:
A. DNA.
B. Membrane-bound organelles.
C. Cytoplasm
D. Ribosomes
B; membrane bound organelles.
Diffusion is the movement of a substance:
A. only through a lipid bilayer membrane.
B. from an area of L c to an area of H c.
C. from an area of H c to an area of L c.
D. Only in lipids.
C; high to low.
The structure that regulates what enters and leaves the cell is:
A. Cell Wall
B. Cell membrane.
C. Nucleus.
D. Nuclear membrane.
B; Cell membrane.
The dispersal of ink in a beaker of water is an example of:
A. Active transport
B. Diffusion
C. Endocytosis
D. Osmosis
B; diffusion.
A cell will swell when its placed in a(n):
A. isotonic solution
B. hypertonic solution.
C. hypotonic solution.
D. none of the above.
C; hypotonic solution.
The sodium-potassium pump:
A. is located in the cytoplasm of a cell.
B. Uses passive transport.
C. Is a carrier protein.
D. Transports sugar molecules.
C; Carrier protein.
Which of the following is a form of active transport?
A. Sodium-potassium pump.
B. Osmosis.
C. Facilitated Diffusion.
D. Diffusion.
A: Sodium-potassium pump
Osmosis is a type of:
A. passive transport.
B. endocytosis.
C. active transport.
D. Facilitated Diffusion.
A; Passive transport
Unlike passive transport, active transport:
A. moves substances down their concentration gradient.
B. Does not involve carrier proteins.
C. Requires energy.
D. All of the above.
C; Requires energy.
To function most efficiently, a cell must be:
A. any size.
B. large.
C. medium.
D. small.
D; Small.
The diffusion of water into or out of a cell is called:
A. Osmosis.
b: Selective transport.
C. solubility.
D. endocytosis
A; Osmosis.
A structure with a eukaryotic cell that performs a specific function is called a:
A. Organ system.
B. Tissue.
C. Organ tissue.
D. Organelle
D; Organelle.
Both active transport and facilitated diffusion involve:
A. Carrier Proteins
B. ATP
C. Movement against a concentration gradient.
D. All of the above.
A; Carrier Proteins.
Which of the following does not require energy:
A. Endocytosis.
B. Active transport.
C. Sodium-potassium Pump.
D. Diffusion.
D; Diffusion.
Molecules that are too large to be moved across a cell membrane can be removed from the cell by:
A. Endocytosis.
B. Osmosis.
C. Exocytosis.
D. Diffusion
C; Exocytosis
Proteins involved in facilitated Diffusion are:
A. ion pumps
B. carrier Proteins.
C. both a and b.
D. none of the above.
B; carrier proteins
The cell membrane.
A: allows materials to enter and leave the cell.
B. is selectively permeable.
C. Encloses the contents of a cell.
D. All of the above.
D: All of the above.
The sodium-potassium pump:
A. increases the concentration of sodium ions inside a cell.
B. decreases the concentration of sodium ions inside of a cell.
C. increases the concentration of potassium ions inside a cell.
D. Both b and c.
D; Both b and c.
Sugar molecules cross the cell membrane by:
A. osmosis.
B. Ion pumps.
C. active transport.
D. facilitated Diffusion.
D; Facilitated Diffusion
Molecules that are too large to be moved through the membrane can be transported into the cell by:
A. Endocytosis.
B. Exocytosis.
C. Osmosis.
D. Diffusion.
A; Endocytosis.
The movement of a solid materials by endocytosis is called ___
Phagocytosis
If a cell is placed in a ___ solution, water will flow into the cell.
Hypotonic
Cells often engulf extracellular particles and fluid, this Is called ___ .
Endocytosis
