1. What do you understand by the term turgor in plant cells?
2 - Leaving Cert Biology - Question 14 - 2016
Question 14
1. What do you understand by the term turgor in plant cells?
2. How do plant cells remain turgid for a considerable period of time?
3. What happens to a plant if m... show full transcript
Worked Solution & Example Answer:1. What do you understand by the term turgor in plant cells?
2 - Leaving Cert Biology - Question 14 - 2016
Step 1
What do you understand by the term turgor in plant cells?
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Answer
Turgor refers to the pressure exerted by the fluid (usually water) inside the plant cell against the cell wall, which helps maintain the cell's shape and structure.
Step 2
How do plant cells remain turgid for a considerable period of time?
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Answer
Plant cells remain turgid by taking in as much water through osmosis as they lose, which maintains the internal pressure against the cell wall.
Step 3
What happens to a plant if many of its cells lose turgidity?
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If many cells in a plant lose turgidity, the plant may wilt or become limp, as it loses rigidity and fails to stand upright.
Step 4
If an animal cell were subjected to the conditions that result in a plant cell becoming turgid, suggest what may happen to the animal cell. Explain your answer.
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Answer
The animal cell may burst because it lacks a rigid cell wall to withstand the pressure from the excess water entering the cell.
Step 5
In relation to the passage of materials through cell membranes, distinguish between diffusion and osmosis by writing one sentence about each term.
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Diffusion is the movement of material from a region of high concentration to a region of lower concentration, while osmosis is the movement of water from a region of high water concentration to a region of low water concentration across a semi-permeable membrane.
Step 6
In your study of human physiology you encountered an example of active transport. Name the location and a material involved.
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An example of active transport occurs in the nephron of the kidney, where glucose or amino acids are reabsorbed into the bloodstream.
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