CNS vs PNS
what is the PNS (peripheral nervous system)
State the function of the axon terminals
What is release neurotransmitters (chemical messages) that travel to the dendrites of the next neuron
When you place your hand on something hot and immediately pull your hand away this is referred to as a ___________ arc.
what is reflex
State the function of the iris
What is contracts and relaxes to control the amount of light entering the eye (also coloured part of eye)
In reflection, the angle of incidence for the incident ray is equal to
What is the angle of reflection for the reflected ray
The central nervous system are made up of these 2 main parts
what are the encephalon and the spinal cord
State the function of the cell body
What is the part of a neuron that creates a nerve impulse
Reflex arcs are much faster than voluntary actions because their pathways avoid this part of the central nervous system.
what is the brain
State the function of the lens
What is flexible structure that changes in shape to focus the eyes
Causes light to converge on the retina
The phenomenon where light bends as it passes into a different translucent medium (ex. air to water) is known as
What is refraction
The encephalon is made up of these 3 parts
What are the brain, brain stem and cerebellum
what is the synapse
a reflex arc that starts in the hand with the skin's receptors then travels through the _________ neuron to the __________ cord then back through a ___________ neuron to a muscle
what is sensory - spinal - motor
State the function of the retina
What is causes light to be changed into nerve impulses
What is they have the highest energy (shortest wavelength) and cause the most damage to cells.
State the functions of the spinal cord:
control ___________
bring motor signals from _________to __________
bring sensory signals from skin to ____________
what are to control reflexes, bring motor signals from brain to muscles, bring sensory signals from skin to brain
State the function of the dendrites
What is stimulated (excitable) part of neuron which receives neurotransmitters from a different neuron
The major difference between the sensory neuron pathway and the motor neuron pathway is the start and end points. For each pathway, state the start and end points. sensory: start-______,end -_______
motor: start-_________, end-______
what is...
sensory: start-sensory receptors (skin),end -brain
motor: start-brain, end-muscle
State the function of the cornea
What is that it is transparent - allows light to enter
Thick outer layer over the iris - to help protect the eye
See the image (desktop) and determine the angle of incidence and reflection.
what is 34 degrees
State the 3 types of neurons
State the name of the chemical message that travels between neurons and the electrical message that travels down the axon.
What are neurotransmitter and nerve impulse
State what CNS and PNS stand for
what is central nervous system and peripheral nervous system
State the function of the optic nerve
what is brings nerve impulse to back of the brain
The visible spectrum is made up of colours that humans can see: Red Orange Yellow Green Blue Indigo Violet. From the electromagnetic spectrum state the type of waves before Red and state the type of waves after Violet
what are infrared waves and ultraviolet waves.