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6. What is the neuronal system?

  • An interconnected network of neurones that signal each other across synapse junctions with slow responses
  • An interconnected network of neurones that signal each other across synapse junctions with rapid responses
  • A system that uses the blood to transport signals by releasing a hormone which is then recognized by a target cell

7. Where is the Hypothalamus?

  • The Brain
  • The Liver
  • The Kidneys

8. What is an Ectotherm?

  • An organism that relies on external sources of heat to regulate its body temperature
  • An organism that can control the loss and production of heat to regulate body temperature
  • A receptor found in the membrane of the skin

9. If there is a FALL in body temperature does the Hypothalamus...

  • Send signals to effector cells and cause Vadodilation, Sweating and No adrenaline released
  • Send signals to effector cells and cause Vasoconstriction, Shivering and Adrenaline to be released
  • Send signals to effector cells and cause Vadodilation, Less sweating and Shivering

10. What is an Endotherm?

  • A receptor found in the membrane of the skin
  • An organism that can control the loss and production of heat to regulate body temperature
  • An organism that relies on external sources of heat to regulate its body temperature

11. Which INCREASES body heat?

  • Shivering, Less sweating and Vasoconstriction
  • Sweating, Hairs lying flat and Vasodilation
  • Sweating, Hairs standing up and Vasoconstriction

12. What is Negative feedback?

  • A process in which any change in a parameter brings about an decrease in that change
  • A process in which any change in a parameter brings about the reversal of that change so the parameter is kept fairly constant
  • A process in which any change in a parameter brings about an increase in that change

13. What is cell signalling?

  • A process where a chemical is released by one cell and is detected by the same cell moments later
  • A process where one cell releases a chemical that is detected by another cell, which then responds to the signal released from the first cell
  • Where a signal from a cell is sent away from cells to a remote location of the body (random)

14. What are Receptors?

  • They detect stimuli and some are cells or proteins on cell membranes
  • They are cells that bring about a response to a stimulus to produce an effect
  • A change in behaviour or physiology as a result of a change in environment

15. What is an Effector?

  • They are cells that bring about a response to a stimulus to produce an effect
  • They detect stimuli and some are cells or proteins on cell membranes
  • A change in behaviour or physiology as a result of a change in environment

16. What is Homeostasis?

  • The maintenance of a constant internal environment despite external changes
  • The maintenance of a constant external environment despite internal changes
  • A change is behaivour or physiology as a result of a change in environment