ch 24 Flashcards
what is hemogoblin
the thing in your blood that makes it red
what does a sympahtetic response do
makes sodium comes faster to make heart beats faster
why do arterys need to be thick and muscular
so they cna withstatnd BP from heart.
what stimulates the heart
SA node, AV node
does the heart or brain stimulate the heart
the heart
What leaks into the SA node to get impulse
sodium, then it reaches threshold
How does blood clotting occur
Platelets stick to the damaged area, forming a temporary plug, and then clotting factors in the blood create a mesh of fibrin that strengthens the clot and seals the wound.
what prevents backflow in veins
the valves
what is heavier blood cells or plasma
cells
why are red blood cells pick with white in the middle
thinner their, light goes through
wjat are the dissolved things in a centrifuge
food nutrients
why are blood cells so purple
stained and nucleus soaks it up
what is a centrifuge
a machine that uses centrifugal force to separate substances based on their density and size
what are the threee protiens in centrifuge
albumins, globulins, fibrinagins
what are the three types of cells
red white blood cells and platellets
what is red blood cells shape, why?
biconcave, its best designed to carry oxygen
if BP is too high what does body doo
makes kidney make more urine so less liqid in blood, and heart beats sloer
what is atherosclierosis
arteries are blocked with colesstroll(plaque)
If BP too low
less urine made and heart beats faster and stronger
what could happen to plaques in heart
could build up bust then clot forms and blocks artery
whats it called whne plaque in brain
stroke
if someone is injured what do you check first
breathing and the heart.
what is another way besides plaques of not getting blood flowing
rupture vessel aneurysm. bleeds out.
whats the tube going down to lungs called
trachea
what does trachea split intoo
bronchi
what do you meet after bronchi
bronchial tubers
whats smaller than bronhial tubes
bronchioles
what is alveoli
Tiny air sacs at the end of the bronchioles
what do red blood cells do
transporting oxygen and carbon dioxide.
what do platellets do
play a crucial role in blood clotting and wound healing.
where does air come through
nasal cavity or mouth
where do air go after nasal cavity or mouth and meet
pharynx
what is the flap that is over the trachea called
epigolttus
what lines the inside of teh trachea
c shaped cartilage,cillia
what do cillia do with dirt
sweep it up so we can cough up dirt
