Coordination/reflexes Flashcards
Pancreas
Monitors blood glucose
Chemical coordination
Brought on by hormones
Adrenaline
Insulin
Glucose measured
Insulin
Keeps control of your blood sugar concentration
Adrenaline
Prepares your body for fight or flight
The brain
Cerebrum Cerebellum Medulla Hypothalamus pituitary gland
Cerebrum
Controls conscious thought
Cerebellum
Coordination and balance
Medulla
Basic body functions
Hypothalamus
Chemical control of the body
Pituitary gland
Chemical control of the body
Focusing
By changing the shape of your lense
Iris
Controls the amount of light allowed in
Dim light to the eye
Pupil enlarges to let as much light in as possible
Bright light to eye
Pupil gets smaller so that the retina is not damaged
Steps of focusing
Light intensity Retina Sensory neurone Unconscious part of the brain Motor neurone to iris Iris muscles Response (pupil size)
Where are sensory receptors found
Sense organs
Sense organs
Eye Ear Tongue Nose Skin
Sense muscles
Pressure
Temperature
Pain
Reflexes: breathing
The reflex takes place
Impulses travel to the unconscious brain
neurone
A nerve cell
Cell body + dendrites + an axon
Carry electrical impulses
Nerve
Neurones together
Synapse
The gap where a neurone end and another begins
How synapses work
Electrical nerve impulse cannot cross the gap
Chemical transmitters are released
These diffuse across the gap
Human central nervous system (CNS)
Brain+spinal cord, gives rapid response to stimuli
Peripheral nervous system
Runs all over the body
Spinal nerves +cranial(brain) nerves
CNS steps
Stimulus Receptor Coordination Effector Response
Coordination
Multicellular organisms have nervous and hormonal coordination and central systems
Sensory neurone
Carry information from sense organs to the CNS
Motor neurones
Carry instructions from the CNS to the effector organs
Nerves
Sensory
Motor
Mixed
Reflex actions
Do not involve conscious though
Reflex steps
Stimulus Receptor Sensory neurone Relay neurone in CNS motor neurone Effector Response
