Movement Of Substances Into And Out Of Cells
Overview
Cells do not exist in isolation. They constantly exchange substances with their surroundings: taking in oxygen and nutrients, releasing carbon dioxide and waste products. Three transport mechanisms make this possible, and each works in a fundamentally different way.
In this lesson you will learn how diffusion, osmosis and active transport move substances into and out of cells. You will explore the factors that affect transport rates, discover why plants wilt and animal cells burst, and design practical investigations to observe these processes first-hand.
Objectives
- Understand the processes of diffusion, osmosis and active transport by which substances move into and out of cells
- Understand how factors affect the rate of movement of substances into and out of cells, including the effects of surface area to volume ratio, distance, temperature and concentration gradient
- Investigate diffusion and osmosis using living and non-living systems
Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Movement Of Substances Into And Out Of Cells. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Which process moves molecules from a region of lower concentration to a region of higher concentration? A) Diffusion B) Osmosis C) Active transport D) Filtration Answer: C
- Osmosis is best described as: A) The movement of any molecule down a concentration gradient B) The net movement of water from high to low water potential through a partially permeable membrane C) The movement of minerals into root hair cells D) The transport of glucose using carrier proteins Answer: B
- A plant cell placed in distilled water will become: A) Plasmolysed B) Crenated C) Turgid D) Lysed Answer: C
- Which factor does NOT affect the rate of diffusion? A) Surface area B) Colour of the cell C) Temperature D) Concentration gradient Answer: B
- Root hair cells contain many mitochondria because: A) They need energy for photosynthesis B) They need energy for active transport of mineral ions C) Mitochondria store water D) Mitochondria produce cell walls Answer: B
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
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Practice Mock Questions
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