B10.2 - The Structure And Function Of The Human Nervous System (Finished) Flashcards
What is the advantage of the nervous system over hormones?
Nervous signals travel really fast so you can react quickly
Order stimulus, CNS, receptor, effector
stimulus, receptor, CNS, effctor
The _ sends an impulse along a _ neurone, carrying information about a change in the _ to the _. Once all the information has been _ , the _ sends impulses down _ neurones. These stimulate the _ to bring about responses.
Receptor, sensory, environment, CNS, processed, CNS, motor, effectors
What are the two examples of a CNS?
Brain, Spinal cord
What happens once a sensory receptor detects a stimulus?
The information is sent as an electrical impulse that passes along neurones to the CNS
What are nerves?
Bundles of hundreds or thousands of neurones
What are sensory neurones?
The neurones that carry impulses from your sense organs to your CNS
What happens when the CNS receives signals?
It processes them then coordinates a response by sending signals down motor neurones to the effectors, that bring about a response
What are muscles and glands an example of?
Effectors
What does the nervous system allow for?
The nervous system allows for reaction to surroundings and coordination of behaviour
What are the five parts of the nervous system?
Central Nervous System, sensory neurones, motor neurones, effectors, receptors
Give the order in which the different parts of the nervous system are used to get a response to a stimulus?
Stimulus > receptor > sensory neurone > CNS > motor neurone > effector > response
What are motor neurones?
Motor neurones are neurones that carry electrical impulses from the CNS to effectors
What do muscles and glands do in response to nervous signals?
Muscles - contract
Glands - secrete hormones
What do effectors do in the nervous system?
Effectors respond to nervous impulses and bring about a change
