Homeostasis Flashcards
On a hot day, how is vasodilation of the blood vessels? (Homeostasis)
Capillaries get wider so a larger amount of blood can flow near the skin surface and heat is lost to the environment
On a hot day, how is the evaporation of sweat? (Homeostasis)
Sweat is produced from the sweat glands and sweat evaporates from the skin
On a cold day, how is the vasoconstriction of blood vessels? (Homeostasis)
Capillaries get smaller so a small amount of blood can flow near the skin surface and heat is kept near the body
On a cold day, how much sweat is produced? (Homeostasis)
None
On a hot day, how are hair and hair erector muscles? (Homeostasis)
They are relaxed
On a cold day, how are hair and hair erector muscles? (Homeostasis)
They stand on end to trap a layer of air
On a cold day, how does the body produce heat? (Homeostasis)
The body starts to shiver to produce heat for the body
What is the central nervous system (CNS)? (Homeostasis)
CNS is made up of 2 organs: the brain and the spinal cord
What is the reflex arc? (Homeostasis)
The stimulus is receptors as the sensory neutron goes into the CNS (coordinator) as the relay neutron then goes into the motor neurone as that turns into the effector then response
What is the synapse? (Homeostasis)
It’s the gap or junction between 2 neutrons, where chemicals diffuse across (Chemical signs)
What is the stimulus? (Homeostasis)
The light/ sound/ chemicals/ temp and pressure
What is the receptors? (Homeostasis)
Eyes/ ears/ nose/ mouth/ skin
What is the sensory neurone? (Homeostasis)
It is electrical signs
What is the motor neurone? (Homeostasis)
Muscle or glands
What is the response in homeostasis?
It is the move or secrete hormones
