B6 Revision Quiz

A change in the environment of an organism is
1. a stimulus
2. a response
3. an effector
4. a coordinator
Which of these are effectors?
1. glands
2. muscles
3. sense organs
4. receptors
The peripheral nervous system includes
1. motor neurons
2. sensory neurons
3. brain
4. spinal cord
Receptors are
1. cells that detect stimuli
2. cells that react to stimuli
3. cells that coordinate responses
4. cells that provide energy for responses
Information passes down nerve cells as
1. tiny electrical impulses
2. chemicals in the bloodstream
3. chemicals between nerve cells
4. vibrations
Nerve cells are insulated by
1. a fatty sheath
2. a plastic sheath
3. cytoplasm
4. a thickened cell membrane
What are the gaps between nerve cells called?
1. synapses
2. junctions
3. neurons
4. cell bodies
When an impulse gets to a junction between two nerve cells...
1. a chemical is produced in both cells and it diffuses across the gap
2. a chemical is produced in one of the cells and it diffuses across the gap
3. the electrical impulse jumps across the gap
4. receptors produce a chemical and it diffuses across the gap
Reflexes are
1. fast and involuntary
2. slow and involuntary
3. fast and under conscious control
4. slow and under conscious control
Which order best describes a reflex?
1. receptor > sensory neuron > motor neuron > effector
2. sensory neuron > motor neuron > effector > receptor
3. receptor > motor neuron > sensory neuron > effector >
4. effector > sensory neuron > motor neuron > receptor
Reflexes can be a problem because
1. they are fast
2. they are inflexible
3. they are involuntary
4. they are learnt
Learning can adapt some reflexes by
1. linking a new stimulus to a response
2. linking a response to a conscious action
3. breaking old connections and then making new ones
4. adding a new connection from the brain
Birds learn to avoid some brightly coloured caterpillers because
1. they contain a poisonous chemical
2. they bite them
3. they are good to eat
4. the caterpiller's colour is very bright
Which part of the brain is where memory, consciousness, language and intelligence operate?
1. cerebral cortex
2. cerebellum
3. medulla
4. pituitary gland
What is memory?
1. the storage and retrieval of information
2. the storage of information
3. the retrieval of information
4. the storage and retrieval of impulses
People with a very good memory train their brains by using
1. patterns that link things
2. repetition
3. a special diet that increases the number of brain cells
4. patterns that they create
Scientists have discovered how memory works.
1. True
2. False
Something is learnt if
1. new connections are formed between brain cells
2. impulses are more likely to pass between certain brain cells
3. impulses are faster between certain brain cells
4. new brain cells have been made in memory areas
Drugs and toxins can affect behaviour because
1. neurons use electrical impulses to pass on information
2. chemicals are used at synapses
3. brain cells are very sensitive
4. the same chemicals are used to make the brain work
Which is the best explanation for why Ecstasy is a stimulant drug.
1. it blocks the synapse receptors in some brain cells
2. it stops a transmitter substance from being taken back in at some synapses
3. it makes impulses work faster
4. it decreases the concentration of serotonin in the brain