Success Criteria To know about communication within the body Outline the need for communication systems within multicellular organisms State that cells need to communicate with each other by cell signalling ID: 1033332
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1. Intro to communication
2. Learning ObjectivesSuccess CriteriaTo know about communication within the bodyOutline the need for communication systems within multi-cellular organismsState that cells need to communicate with each other by cell signallingState examples of cell signallingDefine key termsDescribe secondary messenger systemsDescribe the functions of the adrenal glands
3. Starter QuestionWhat conditions do you need to consider for efficient enzyme action?
4. Why do multicellular organisms need communication systems?Internal ChangesExternal ChangesCo-ordinate activities of different organs
5. Task: Key terms: What do they mean?Endocrine glandExocrine glandHormoneTarget Tissue
6. Answers: Key terms: What do they mean?Endocrine glandSecretes hormones directly into the bloodExocrine glandSecretes molecules into a duct which carries them to where they are usedHormoneMolecules released by endocrine glands directly into blood. Act as messengers carrying signal from endocrine gland to target tissueTarget TissuePossess specific receptor on their plasma membrane. Shape of receptor is complementary to the shape of the hormone molecule.
7. Communication on a cellular levelCell SignallingNervous SystemNeurones & SynapsesRapidHormonal SystemHormones carried in bloodOnly recognised by target cellsLonger term responses
8. Task: Where are your glands?Draw round a member of your groupCut out the different glands and place them where you think they are in the bodyLabel them
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10. Task:Second Messenger systemsTask: One person will describe what they seeThe other person will draw
11. Second Messenger SystemTask: each draw labelled diagram of cAMP
12. Function of Adrenal GlandsAdrenal MedullaResponds to stress e.g. pain or shockWidespread effect as most cells have receptors for adrenalineAdrenal CortexMakes steroid hormonesTask: use p23 to add 2 specific examples of the roles of AM & AC
13. Outine how adrenaline activates enzymes within the target cell [5]Plenary
14. Mark Scheme [5]Adrenaline binds to receptor on target cellAdrenaline first messengerAdrenaline can’t enter the cellChanges shape of Adenyl cyclase inside cellActivates adenyl cyclaseChanges ATP into cAMPcAMP second messengercAMP activates enzyme in the cell
15. Adrenaline Jan 11See print out of page 10
16. Adrenaline Jan 11 Markscheme
17. Adrenaline Jan 11
18. Adrenaline Jan 11 Markscheme