Chapter 15 - Animal Responses
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- Created on: 06-05-16 09:49
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- Chapter 15 - Animal Responses
- The nervous system
- Central nervous system
- Mostly consists of intermediate neurones
- The brain and the spinal cord
- Both surrounded by cerebro-spinal fluid, secreted by meninges
- Peripheral nervous system
- Somatic nervous system
- This is mostly under voluntary control, and consists of sensory and motor neurones
- Autonomic nervous system
- Sympathetic
- CNS --> preganglionic neurone --> Motor neurone (starting in the autonomic ganglion)
- Stimulates organs
- Mostly uses noradrenaline but sometimes uses acetylcholine
- 'Fight or flight'
- Parasympathetic
- 'rest and digest'
- Contains neurones that carry the impulse actually go inside the wall of the organ it effects
- All cholinergic synapses
- The motor neurones that supply the viscera (internal organs), this system also includes preganglionic neurones
- Sympathetic
- Somatic nervous system
- Central nervous system
- The Brain
- Structure
- Surrounded by cerebro-spinal fluid
- Protected by the cranium and meninges
- Has a blood-brain barrier to prevent the brain being exposed to potentially harmful substances
- Cerebral cortex - higher order thinking
- Broca's area - Production of language when speaking and writing
- Wernicke's area - Understanding of language
- Structure
- Muscular movement
- Three types of muscle: skeletal (striated), cardiac and smooth
- Made of sarcomeres
- M & Z lines
- Actin and myosin filaments
- I band only contains actin, H band only myosin, A band both
- Contraction
- Sliding filament model
- Stimulated at neuromuscular junctions
- The nervous system
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