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Coordination and regulation:  Endocrine systems Chapter 5
Our external environment often changes, but our internal environment must stay constant,  how can this be achieved?
The Fluids ,[object Object],There is constant exchange between these fluids, so the makeup of one  is often a very good indication of the makeup of the others Cerebro-spinal fluid Interstitial fluid (aka tissue fluid) Plasma Cytosol ,[object Object],Extracellular Intracellular Fluid
Homeostasis ,[object Object],[object Object],[object Object],[object Object]
Variables subject to homeostasis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],What can stop / prevent homeostasis from being maintained ? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Body systems involved in Homeostasis Nervous Endocrine (hormonal) Respiratory Circulatory Digestive Excretory Integumentary (skin)
Hormones ,[object Object],[object Object],[object Object],[object Object]
A (hopefully) useful analogy) SENSORS detect if car speed is  lesser or greater than 60kph Going too  fast Going too slow Brake Accelerate Go slower Go faster EFFECTORS increase or decrease speed
Controlling Blood Glucose ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Beta cells  decreasing  production of insulin Beta cells  increasing  production of insulin Alpha cells  increasing  production of glycogen Alpha cells  decreasing  production of glycogen Blood glucose can be  raised  by: Blood glucose can be  lowered  by:
Diabetes ,[object Object],[object Object],[object Object],[object Object],[object Object]
 
Not all feedback mechanisms are negative (but most are)
Cell Communication ,[object Object],[object Object],[object Object],[object Object],[object Object]
Communication between adjacent cells
Cell Communication ,[object Object],[object Object],[object Object]
Three types of Hormones ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Three types of Hormones
Cell Receptors & Transduction Pathway ,[object Object],[object Object],[object Object],[object Object],[object Object]
 
The Next Steps ,[object Object],[object Object],[object Object],[object Object],[object Object]
Pheromones ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],FAIL !!
 
Plant growth and development ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Plant Hormones ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
Auxins ,[object Object],[object Object],[object Object]
IAA – Indoleacetic Acid (an Auxin) ,[object Object],[object Object],[object Object],[object Object],[object Object]
Tropisms and Auxins ,[object Object],[object Object],[object Object],[object Object],[object Object]
Phototropism ,[object Object],[object Object],[object Object]
Geotropism ,[object Object],[object Object],[object Object],[object Object],[object Object]
Gibberellins ,[object Object],[object Object],[object Object],[object Object],[object Object]
Abscisic Acid ,[object Object],[object Object],[object Object],[object Object]
Ethylene ,[object Object],[object Object],[object Object],[object Object],Cytokinins Florigens ,[object Object],[object Object]
The burning of kerosene releases ethylene gas which would have  made the fruit ripen more rapidly
Pair the plant hormone with its function  B D E A C E) Increases rate of cellular respiration Cytokinins D) Stimulates seed germination Abscisic Acid C) Promotes cell division Ethylene B) Promotes stem growth through cell elongation Giberellins A) Promotes seed dormancy Auxin
C
D
Holiday Homework!! ,[object Object],[object Object],[object Object],[object Object]

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5 - Detecting and responding

  • 1. Coordination and regulation: Endocrine systems Chapter 5
  • 2. Our external environment often changes, but our internal environment must stay constant, how can this be achieved?
  • 3.
  • 4.
  • 5.
  • 6. Body systems involved in Homeostasis Nervous Endocrine (hormonal) Respiratory Circulatory Digestive Excretory Integumentary (skin)
  • 7.
  • 8. A (hopefully) useful analogy) SENSORS detect if car speed is lesser or greater than 60kph Going too fast Going too slow Brake Accelerate Go slower Go faster EFFECTORS increase or decrease speed
  • 9.
  • 10.
  • 11.  
  • 12. Not all feedback mechanisms are negative (but most are)
  • 13.
  • 15.
  • 16.
  • 17. Three types of Hormones
  • 18.
  • 19.  
  • 20.
  • 21.
  • 22.  
  • 23.
  • 24.
  • 25.  
  • 26.
  • 27.
  • 28.
  • 29.
  • 30.
  • 31.
  • 32.
  • 33.
  • 34. The burning of kerosene releases ethylene gas which would have made the fruit ripen more rapidly
  • 35. Pair the plant hormone with its function B D E A C E) Increases rate of cellular respiration Cytokinins D) Stimulates seed germination Abscisic Acid C) Promotes cell division Ethylene B) Promotes stem growth through cell elongation Giberellins A) Promotes seed dormancy Auxin
  • 36. C
  • 37. D
  • 38.