5215672
Description
Flashcards by Anisha Rai, updated more than 1 year ago
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Created by Anisha Rai
over 10 years ago
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| Question | Answer |
| What does the nervous system enable humans to do? | React to their surroundings and coordinate their behaviour |
| Where is information retrieved? | From receptors |
| How is that information passed along? | Along cells called neurones as impulses |
| Where does the information travel to? | The central nervous system (the brain or spinal chord) |
| What coordinates a response? | The brain |
| What is the brain made out of? | Billions of interconnected neurones |
| What is the cerebral cortex? | Concerned with consciousness, intelligence, memory and language |
| What is the cerebellum? | Concerned mainly with the coordination of muscular activity |
| What is the medulla? | Concerned with unconscious activities such as heartbeat and breathing |
| How have scientists been able to map the regions of the brain to particular functions? | Studying patients with brain damage Electrically stimulating different parts of the brain Using MRI scanning techniques |
| What is the speed of a reflex action? | Automatic and rapid |
| Which neurones are invloved with reflex actions? | Sensory Relay Motor |
| What happens during a simple reflex such as a pain-withdrawal reflex? | Impulses from receptor pass along sensory neurone to cns At synapse between sensory and relay neurone in cns, chemical is released - causes impulse to be sent along relay neurone Chemical released at synapse between relay and motor neurone in cns - cause impulses to be sent along motor neurone to effector Effector either muscle or gland: muscle responds by contracting, gland responds by releasing chemicals |
| Give two examples of an effector | Muscle Gland |
| What is the nervous system sequence? | Stimulus Receptor Co-ordinator Effector Response |
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