change in the internal or external environment, such as temperature, light intensity or pressure
directional movement in response to stimulus
non-directional (random) movement in response to a stimulus
Container with different compartments, in which you create different environmental conditions
detect stimuli, can be cells or proteins on cell surface membranes, specific to one type of stimuli.
cells that bring about a response to a stimulus, to produce an effect.
Neurone that transmits electrical impulses from receptors to the central nervous system
Neurone that transmits electrical impulses from the central nervous system to effectors
Neurone that transmits electrical impulses between sensory neurones and motor neurones
take the information across the synapse to the next neurone where another electrical impulse is generated
Causes a rapid, involuntary, automatic response to stimuli
The pathway of neurones linking receptors to effectors in a simple reflex
The potential difference when a cell is at rest
The change in potential difference due to a stimulus
Triggered if the generator potential reaches the threshold level
mechanoreceptors that detect mechanical stimuli, found in your skin, contains sensory nerve ending
layers of connective tissue wrapped around the pacinian corpuscles
Receptors in the eye that detect light
Light enters the eye through this
the amount of light that enters the eye is controlled by the muscles of this
Light rays are focused by the lens onto this
An area of the retina where there are lots of photoreceptors
Nerve impulses from the photoreceptor cells are carried from the retina to the brain by this
Where the optic nerve leaves the eye, there are no photoreceptor cells there
neurones that connect photoreceptors to the optic nerve
Photoreceptors found in peripheral parts of the retina
Photoreceptors packed together in the fovea
ability to tell apart points that are close together
nervous system that controls conscious activities
nervous system that controls unconscious activities
Can contract and relax without receiving signals from nerves
Nervous system that gets the body ready for action
Nervous system that calms the body down
sets the rhythm of the heartbeat by sending out regular waves of electrical activity to the atrial walls
Responsible for passing the waves of electrical activity onto the bundle of His
fibres carries the waves of electrical activity into the muscular walls of the right and left ventricles
Receptors stimulated by high and low blood pressure
Receptors that monitor oxygen levels in the blood

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The Nervous System




The Nervous System




The Nervous System


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