Osmosis Practice

What term is used to describe when two solutions have reached a balanced state?

• Hypotonic

• Tonicity

• Hypertonic

• Equilibrium

Answer explanation

The term 'Equilibrium' describes a balanced state between two solutions, where their concentrations are equal, resulting in no net movement of water. This is distinct from 'Hypotonic' and 'Hypertonic', which refer to relative concentrations.

During osmosis

• water moves from high to low concentration

• large or oddly shaped molecules move across a cell membrane

• water moves when energy is used

• proteins are built

Answer explanation

During osmosis, water moves from an area of high concentration to an area of low concentration. This process does not require energy and specifically involves the movement of water, not large molecules or protein synthesis.

What type of solution allows water to enter the plant cell?

• hypotonic solution

• hypertonic solution

• isotonic solution

• active transport

Answer explanation

A hypotonic solution has a lower concentration of solutes compared to the inside of the plant cell, causing water to enter the cell by osmosis, leading to turgor pressure that helps maintain the cell's structure.

A person would never have pure water put into their veins in a hospital because their cells would...

• Shrink/Dehydrate

• Expand

Answer explanation

A person would never have pure water put into their veins because it would cause their cells to expand. This happens due to osmosis, where water moves into cells to balance solute concentrations, leading to potential cell damage.

What is diffusion?

• when molecules move 

• when molecules move from a high concentration to a low.

• no movement 

• molecules move everywhere

Answer explanation

Diffusion is the process where molecules move from an area of high concentration to an area of low concentration. This is the correct choice, as it accurately describes how diffusion occurs.

Ideally, your cells should be in a(n) _______ solution

• Hypertonic

• Hypotonic

• Isotonic

• Cola

Answer explanation

Cells should ideally be in an isotonic solution, where the concentration of solutes is equal inside and outside the cell. This balance prevents net movement of water, maintaining cell shape and function.

An animal cell placed in a hypertonic (salty) solution will

• Shrink

• Swell

• Stay the same

Answer explanation

An animal cell in a hypertonic solution loses water to the surrounding environment, causing it to shrink. This is due to osmosis, where water moves from an area of lower solute concentration inside the cell to a higher concentration outside.

All of the following statements can be used to describe osmosis, EXCEPT:

• Osmosis is the movement of water molecules from an area of high concentration to an area of low concentration.

• Osmosis is the diffusion of water.

• Osmosis is a type of passive transport.

• Osmosis requires energy in the form of ATP.

Answer explanation

Osmosis is a passive process that does not require energy. It involves the movement of water from high to low concentration, making the statement about requiring ATP incorrect.

What are the three types of passive transport?

• Simple Diffusion, Osmosis, Facilitated Diffusion

• Active Transport, Osmosis, Facilitated Diffusion

• Diffusion, Endocytosis, Exocytosis

• Diffusion, Osmosis, Active Transport

Answer explanation

The three types of passive transport are Simple Diffusion, Osmosis, and Facilitated Diffusion. These processes allow substances to move across cell membranes without the use of energy, distinguishing them from active transport.

Determine the tonicity

Groups:

(a) Hypotonic

,

(b) Isotonic

,

(c) Hypertonic

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