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How Stuff Moves in Plants: Diffusion, Osmosis, and Active Transport

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erin

24/03/2023

Biology

biology - b2 paper 3 higher revision notes

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Cell biology

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Transport in cells

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Required practical - the effect of osmosis on plant tissue

How Stuff Moves in Plants: Diffusion, Osmosis, and Active Transport

A comprehensive guide to cellular processes focusing on increase rate of diffusion in living systems, transport mechanisms, and cell division.

  • Diffusion is fundamental to cellular function, involving particle movement from high to low concentration areas
  • The osmosis process in plant cells is crucial for maintaining cell structure and function
  • Active transport against concentration gradient requires energy and is vital for cellular survival
  • Cell division through mitosis ensures growth and repair of organisms
  • Cell differentiation allows specialized functions in different cell types
...

24/03/2023

299

diffusion in living cells - all that is needed is a concentration gradient diffusion is the net movement of panicies from an area of high to

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Page 2: Active Transport and Cell Structure

This section delves into active transport against concentration gradient and cellular pressure mechanisms. It explains how cells maintain balance and transport substances against concentration gradients.

Definition: Active transport is the movement of substances from a dilute to a concentrated solution against a concentration gradient, requiring energy from respiration.

Highlight: The greater the rate of cellular respiration, the more energy is available for active transport.

Example: When sugar molecules hit the cell membrane, they bounce away, while water molecules can pass through, demonstrating selective permeability.

The page also introduces chromosomes and their role in cell division, explaining how DNA is organized within the nucleus and its importance in genetic information storage.

diffusion in living cells - all that is needed is a concentration gradient diffusion is the net movement of panicies from an area of high to

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Page 3: Cell Division and Differentiation

The final section covers mitosis, the cell cycle, and cellular differentiation, explaining how cells divide and specialize for specific functions.

Definition: Mitosis is a type of cell division where a diploid body cell copies itself and divides into two identical daughter cells.

Highlight: The cell cycle involves six distinct stages, from initial growth through division to the resting period.

Example: Sperm cells demonstrate cellular adaptation through specialized features like acrosomes for egg cell penetration and a nucleus containing 23 chromosomes.

Vocabulary: Cell differentiation refers to the process where cells acquire specific features required for their particular functions.

The text concludes by explaining how mitosis occurs in various situations, including cell replacement, reproduction, and cancer cell division.

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Subjects

Biology

Cell biology

Transport in cells

Required practical - the effect of osmosis on plant tissue

 

Biology

•

299

•

24 Mar 2023

•

3 pages

How Stuff Moves in Plants: Diffusion, Osmosis, and Active Transport

user profile picture

erin

@erinnngeorg.ia_

A comprehensive guide to cellular processes focusing on increase rate of diffusion in living systems, transport mechanisms, and cell division.

  • Diffusion is fundamental to cellular function, involving particle movement from high to low concentration areas
  • The osmosis process in... Show more

diffusion in living cells - all that is needed is a concentration gradient diffusion is the net movement of panicies from an area of high to

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Page 2: Active Transport and Cell Structure

This section delves into active transport against concentration gradient and cellular pressure mechanisms. It explains how cells maintain balance and transport substances against concentration gradients.

Definition: Active transport is the movement of substances from a dilute to a concentrated solution against a concentration gradient, requiring energy from respiration.

Highlight: The greater the rate of cellular respiration, the more energy is available for active transport.

Example: When sugar molecules hit the cell membrane, they bounce away, while water molecules can pass through, demonstrating selective permeability.

The page also introduces chromosomes and their role in cell division, explaining how DNA is organized within the nucleus and its importance in genetic information storage.

Sign up to see the contentIt's free!

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Page 3: Cell Division and Differentiation

The final section covers mitosis, the cell cycle, and cellular differentiation, explaining how cells divide and specialize for specific functions.

Definition: Mitosis is a type of cell division where a diploid body cell copies itself and divides into two identical daughter cells.

Highlight: The cell cycle involves six distinct stages, from initial growth through division to the resting period.

Example: Sperm cells demonstrate cellular adaptation through specialized features like acrosomes for egg cell penetration and a nucleus containing 23 chromosomes.

Vocabulary: Cell differentiation refers to the process where cells acquire specific features required for their particular functions.

The text concludes by explaining how mitosis occurs in various situations, including cell replacement, reproduction, and cancer cell division.

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Page 1: Transport Mechanisms in Cells

The page explores fundamental cellular transport processes, focusing on diffusion and its role in living systems. The text details how substances move across cell membranes and the factors affecting transport rates.

Definition: Diffusion is the net movement of particles from an area of high concentration to low concentration until equilibrium is reached.

Example: During photosynthesis, CO₂ diffuses into leaves through stomata, where palisade cells utilize it. The lower CO₂ concentration inside the leaf creates a concentration gradient.

Highlight: The rate of diffusion can be enhanced by:

  • Increasing surface area
  • Decreasing particle travel distance
  • Increasing concentration gradient

Vocabulary: Partially permeable membranes are cell structures that allow some particles to pass through while blocking others.

The text explains how osmosis process in plant cells works, defining it as water movement from dilute to concentrated solutions through a partially permeable membrane. It also introduces the concept of water potential and its importance in cellular processes.

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Thomas R

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