1
Moving your hand away, blinking when something is thrown towards you.
What are the specialised cells in the nervous system called
Neurons
What are the names of the two divisions of the nervous system?
CNS and PNS
What organs are a part of the central nervous system
brain and spine
What is a hypothesis?
A testable prediction or statement
How do you calculate stopping distance
Reaction distance + braking distance
Name three functions of the nervous system
Receive sensory information from receptors, process information and send signals to the effectors
Name the region of the brain responsible for balance, coordination and movement
the cerebellum
Calculate the stopping distance if reaction distance is 22m and braking distance is 41m
63m
The nerves in the body are a part of what division of the nervous system
PNS
control blood pressure, heart beat, breathing
Name 3 factors that would increase reaction time
fatigue, drugs, hearing/eyesight problems
Name 2 factors that can (decrease) speed up reaction time
practice, anticipation
Where are interneurons located?
The spinal cord
Name 4 different structures of a neuron
dendrites, axon, axon terminal, cell body, myelin sheath.
What are receptors and effectors in the nervous system? give an example of each
Receptors, receive information and send to the brain. e.g., eyes
effectors, receive instructions from the brain, e.g., muscles
Describe 3 ways to make an investigation more VALID
control more variables, use a more accurate measurement technique, retake measurements, have a control group
should the y-axis of a graph show the dependent or independent variable
Dependent (what is being measured)
Name 3 vehicle factors that would increase a cars braking distance
lack of ABS, worn brakes, worn tires
What is the difference between a reaction and a reflex?
Reaction is conscious, reflex unconcious, reaction coordinated by the brain, reflex via the spinal cord
Describe the path an electrical impulse would take in a 'reflex arc'
receptors, sensory neuron, interneuron in the spine, motor neuron, effector
Explain why reaction distance (gets longer) as the speed of a vehicle increases.
in the time it takes a driver to react, the vehicle has travelled further if it is travelling at greater speed compared to a slower speed.
Name 5 things a graph should have
Labelled axis, even scale, a descriptive title, units, averages plotted.
Write an example of a hypothesis.
if then statement
Describe the purpose of a 'reflex arc'
quicker reactions, happens automatically, protects the body from harm