Flashcards
4.5 The nervous system
Cards in this deck (15)
- 1What does the nervous system enable humans to do?React to their surroundings and coordinate their behaviour
- 2Where is information retrieved?From receptors
- 3How is that information passed along?Along cells called neurones as impulses
- 4Where does the information travel to?The central nervous system
(the brain or spinal chord) - 5What coordinates a response?The brain
- 6What is the brain made out of?Billions of interconnected neurones
- 7What is the cerebral cortex?Concerned with consciousness, intelligence, memory and language
- 8What is the cerebellum?Concerned mainly with the coordination of muscular activity
- 9What is the medulla?Concerned with unconscious activities such as heartbeat and breathing
- 10How 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 - 11What is the speed of a reflex action?Automatic and rapid
- 12Which neurones are invloved with reflex actions?Sensory
Relay
Motor - 13What 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 - 14Give two examples of an effectorMuscle
Gland - 15What is the nervous system sequence?Stimulus
Receptor
Co-ordinator
Effector
Response
Information
- Description
- GCSE Biology (4 Human Biology) Flashcards on 4.5 The nervous system, created by Anisha Rai on 22/04/2016.
- Created by
- Anisha Rai
- Views
- 14
- Tags
- Rating