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Lesson 2: Synapses & reflexes

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In deze les zitten 12 slides, met interactieve quiz en tekstslides.

time-iconLesduur is: 45 min

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Lesson up

Slide 1 - Tekstslide

Today
  • Lesson 2 synapses and reflexes
  • Lab report respiration grades and feedback
  • Knowledge quiz 

Slide 2 - Tekstslide

Brain and Senses
Lesson 2: Synapses & reflexes





Chapter 8: Kerboodle:  'Control and coordination' 
-Page 112-114


Slide 3 - Tekstslide

Dendrite
Cell body
Nucleus
Axon
Fatty sheath
Synapse

Slide 4 - Sleepvraag

Synapses 
  • Gap between 2 neurons
  • When an impulse reaches the end of the axon it produces  a chemical: neurotransmitters
  • Diffuses across the gap and binds receptors of in the membrane of the next neuron
  • It starts off a impulse in the next neuron
  • One end can make it so impulses travel in one direction!
Impulse
Impulse

Slide 5 - Tekstslide

Synapses 
2 other functions:
  • Resistor: enough impulses are needed to start an impulse at the next neuron. 
  • Junction box: a neuron can pass an impulse to a number of neurons

Drugs affect synapses
  • Alchohol (slows reactions down)


Impulse
Impulse

Slide 6 - Tekstslide

Synapse at the muscle

Slide 7 - Tekstslide

Reflex arcs
  • You take away your hand from an hot object very fast
    Automatically, why? 

  • Reflexes protect you 
  • Why do you think a reflex is unconscious? 

  • Signal does not go to the brain immediately
  • It goes to the spinal cord and back (short circuit) 

Slide 8 - Tekstslide

Reflex arcs
W
Stimulus? 
Receptor? 
Effector? 
Response? 

Slide 9 - Tekstslide

Reflex arcs
Stimulus = hot flame 
Receptor = heat sensor in the skin 
Effector = muscles in your arm
Response = moving your hand away from the hot object. 

Slide 10 - Tekstslide

Lab report respiration
-Look at the feedback
-Ask questions if you have them

Slide 11 - Tekstslide

HW for next lesson 
Hw for lesson 4: 
Complete the worksheet on classroom

Slide 12 - Tekstslide