Osmosis (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
What is osmosis?
What is osmosis?
Movement of water across a membrane
Does osmosis require energy?
Does osmosis require energy?
No, it is a passive process
What does a semi-permeable membrane block?
What does a semi-permeable membrane block?
Larger molecules like sugars or proteins
Which substances have strictly regulated movement in/out of cells?
Which substances have strictly regulated movement in/out of cells?
Salts, glucose, and amino acids
What type of permeability does the plant cell wall have?
What type of permeability does the plant cell wall have?
Fully permeable
What happens to a plant cell in distilled water?
What happens to a plant cell in distilled water?
Becomes turgid and firm
What is turgor pressure?
What is turgor pressure?
Pressure of vacuole against cell wall
What happens to a plant cell in a highly concentrated solution?
What happens to a plant cell in a highly concentrated solution?
Becomes plasmolysed and loses turgor
Why do animal cells burst in very dilute solutions?
Why do animal cells burst in very dilute solutions?
They lack a cell wall for support
What happens to animal cells in very concentrated solutions?
What happens to animal cells in very concentrated solutions?
They shrink and become dehydrated
How does salt preserve fish and meat?
How does salt preserve fish and meat?
Removes water from microorganisms by osmosis
What is a hypotonic solution?
What is a hypotonic solution?
Higher water concentration than cell
What is a hypertonic solution?
What is a hypertonic solution?
Lower water concentration than cell