Cell Transport

A balance that an organism maintains by regulating what goes into and out of the cell.

• Hypertonic

• Homeostasis

• Plasmolysis

• Hypotonic

Answer explanation

Homeostasis is the process by which an organism maintains a stable internal environment by regulating the movement of substances in and out of cells, ensuring balance despite external changes.

The type of cellular transport that requires no energy.

• Active Transport

• Protein Pumps

• Passive Transport

• Endocytosis

Answer explanation

Passive transport is the type of cellular transport that requires no energy, as it relies on the natural movement of molecules from areas of higher concentration to lower concentration.

Which of the following modes of cellular transport does NOT require energy?

• Facilitated Diffusion

• Protein Pumps

• Endocytosis

• Exocytosis

Answer explanation

Facilitated diffusion is a passive transport process that does not require energy, as it relies on the concentration gradient. In contrast, protein pumps, endocytosis, and exocytosis all require energy to move substances across the cell membrane.

The process of engulfing food or liquid particles into the cell.

• Osmosis

• Exocytosis

• Endocytosis

• Diffusion

Answer explanation

Endocytosis is the process where cells engulf food or liquid particles, allowing them to enter the cell. This distinguishes it from osmosis, exocytosis, and diffusion, which involve different mechanisms of transport.

The release of large particles, often waste materials from the inside of the cell to the outside of the cell.

• Osmosis

• Exocytosis

• Endocytosis

• Diffusion

Answer explanation

Exocytosis is the process where large particles, such as waste materials, are released from the inside of the cell to the outside. This distinguishes it from osmosis, endocytosis, and diffusion, which involve different mechanisms.

What type of transport involves the movement of water from high to low concentrations?

• Diffusion

• Active Transport

• Facilitated Diffusion

• Osmosis

Answer explanation

Osmosis is the process that specifically describes the movement of water across a semipermeable membrane from an area of high water concentration to an area of low water concentration, making it the correct choice.

What type of transport uses transport (channel) proteins to help molecules move from higher to lower concentrations?

• Protein Pumps

• Diffusion

• Facilitated Diffusion

• Osmosis

Answer explanation

Facilitated diffusion uses transport (channel) proteins to assist molecules in moving from areas of higher concentration to lower concentration, making it distinct from other processes like diffusion and osmosis.

A cell with a 5% salt solution is placed into a beaker with a 10% salt solution.  What will happen to the cell?

• It will shrink

• It will swell

• No change

• Cytolysis

Answer explanation

The cell in a 5% salt solution is in a hypotonic environment compared to the 10% salt solution in the beaker. Water will move out of the cell to balance the concentration, causing the cell to shrink.

A cell with a 5% salt solution is placed into a beaker with a 10% salt solution.  This solution is considered to be _____ to the cell.

• Isotonic

• Hypertonic

• Hypotonic

• None of the Above

Answer explanation

The cell is in a 5% salt solution, and the surrounding beaker has a 10% salt solution. Since the beaker's solution has a higher concentration of salt, it is hypertonic to the cell, causing water to move out of the cell.

A cell with a 10% salt solution is placed into a beaker with a 40% salt solution.  How will water move?

• It will leave the cell

• It will enter the cell

• It will move in and out equally

• There will be no movement

Answer explanation

Water will move out of the cell because the surrounding solution is more concentrated (40% salt) than the cell's solution (10% salt). This process, called osmosis, causes water to leave the cell to balance the salt concentrations.