Paper 2 Flashcards
What’s things does homeostasis regulate
Blood glucose concentration
Internal temperature
Water levels
What is the CNS
Central nervous system
Brain and spinal cord
What is the PNS
Peripheral Nervous System
All other nerves
What is a reflex
Signal bypasses Brain - much quicker
What is the chemical used in synapses
Neurotransmitter
How are glands effectors ?
Secrete chemicals
How to test reaction time
Drop ruler between finger and thumb
What does the cerebral cortex do
Memory
Speech
Problem solving
What does the Cerebellum do
Movement
Balance
Coordination
What does the Medulla do
Unconscious actions
Heart and breathing rate
How can you see brain activity
MRI scan
What happens to the eye when it’s far away
CM relax
SL tighten
Thin lens
What happens to the eye when looking near
CM contract
SL slacken
Thick lens
What is the term for short sightedness
Myopia
What is the term for long sightedness
Hyperopia
How can long and short sighted be treated
Glasses,contact lens or laser eye surgery
What is thermoregulation
Your body regulating body temperature by using effectors
What happens when your hot
Sweat glands produce water which evaporates taking away the heat
Blood vessels dilate
Called VASODILATION
What happens when your cold
Hairs stand on end to trap air
Shivering-muscles contract produce more heat
Blood vessels contract
Called vasoconstriction
What is the endocrine system
System of glands that secrete hormone to send signals to effectors
What is does the pituitary gland do
Sends signals to other glands
What does the pancreas do
Secrets insulin (and glycogen ) to control blood sugar
What does the thyroid control
Controls growth,metabolism and more
What does the adrenal gland do
Releases adrenaline