g)+Gas+exchange+(Plants)

Section 2- Structures and functions in living organisms a) Levels of organisation - b) Cell structure - c) Biological molecules - d) Movement of substances - e) Human Nutrition - e) Plant Nutrition - f) Respiration - g) Gas exchange (Humans) - g) Gas exchange (Plants) - h) Transport (Humans) - h) Transport (Plants) - i) Excretion - j) Coordination and response (Humans) - j) Coordination and response (Plants)

2g) Gas exchange (Plants)
2.39 understand gas exchange (of carbon dioxide and oxygen) in relation to respiration and photosynthesis 2.40 understand that respiration continues during the day and night, but that the net exchange of carbon dioxide and oxygen depends on the intensity of light 2.41 explain how the structure of the leaf is adapted for gas exchange 2.42 describe the role of stomata in gas exchange 2.43 describe experiments to investigate the effect of light on net gas exchange from a leaf, using hydrogen-carbonate indicator
 * Learning outcomes (s//tudents will be assessed on their ability to)//**

//N.B. learning outcome "2.67 understand the origin of carbon dioxide and oxygen as waste products of metabolism and their loss from the stomata of a leaf" is taught implicitly as part of this topic.//

Download the BioK note outline below to help you build notes for this topic. Complete the activities and labs as directed. Complete the summary questions as directed. media type="custom" key="25643486"
 * Approach**

Most of what you need to know for plant gas exchange you will have picked up already whilst learning photosynthesis. These tutorials will help you review your photosynthesis knowledge and teach you again aspects of plant gas exchange:
 * Tutorials**
 * [|A good video tutorial from skoool.co.uk] covering all the aspects of photosynthesis
 * A simple, but useful, [|revision tutorial from s-cool] with an overview of photosynthesis

These video tutorials from [|Click4Biology] address each learning outcome. Watch each video before attempting your workbook. Download links are are provided for those that have problems accessing Youtube. ‪2.39 Gas Exchange in plants‬ [|download] media type="custom" key="23691510"

2.40 Net Gas Exchange [|download] media type="custom" key="23691512"

2.41 Adaptations of the leaf for Gas Exchange [|download] media type="custom" key="23691514"

2.42 Stomata [|download] media type="custom" key="23691516"


 * Classwork**

Starter:
 * 1) What is a tissue?
 * 2) How many different types of tissue are there in a leaf? Name them.
 * 3) If a leaf contains different types of tissue that makes it an organ. How many other plant organs can you name?


 * Practical work**

What do stomata look like? Use the [|outline from Biology Corner] N.B. though evergreen plants, such as holly, with thick waxy cuticles work best this will work on many different leaves. It is easier to do on bigger stronger leaves though.


 * Useful links**