respiratory system review Flashcards
what is the bronchi
the trachea that is divided into r and l bronchi
what are bronchioles
branched divided from bronchi, have thinner walls and the c rings are no longer present
what are alveoli
small sacs at end of bronchioles, where gas exchange occurs
what do the ribs and diaphragm when breathing occurs
expand and contracts the thorax cavity
what is the pleural membrane
thin serous membrane that covers lungs, chest wall and diaphragm, helps with siding during inhalation exhales
what does the pleural membrane surround
the lungs
the process of inhaling is accompanied by
a decrease in volume in thoracic cavity
what is this: air pressure in lungs decrease and outside air rushes in
inhalation
where does oxygen diffuse in the blood
alveoli
speed sounds are made when air moves through
larynx
what holds the structures that vibrate to make sound
larynx
cilia are found where
in the trachea
which enzyme speeds up the reaction between CO2 and H2O
carbonic anhydrase
why is hemoglobin suited for transport of oxygen
picks up and gives up easy
diffusion of gases occurs in
lungs and tissues
the trachea is held open by for —— so air can pass
c rings
what is the respiratory centre sensitive to
high oxygen content in blood
o2 enter blood in
the lungs
o2 exits blood
in tissues
co2 enter blood where
tissue
co2 exits blood
in the lungs
what the muscles in ribs called
intercostal muscles
what is the amount of pressure gas exerts
partial pressure
most of co2 carried in blood is
bicarbonate ions
how is carbominohemoglobin formed
small amount is co2 enter red blood cells is taken up by hemoglobin
what is reduce hemoglobin
blood that was left the tissue capillaries and is deep purple
during inhaling what occurs
air is conducted toward the lungs
during exhaling what occurs
air is conducted away from the lungs
what happens to air when it’s passed through air passage
filter my cilia, warmed by blood vessel and moisted
what glands drain into nasal cavities
tear glands
what are air filled mucous membranes spaces in skull
cranial sinuses
where do the nasal cavities empty knot
nasopharynx
what occurs if there were a decreased level of hemoglobin in the blood?
tissues would become more acidic
In the capillary network surrounding the alveoli, oxygen enters the blood by
diffusion
What occurs when the diaphragm relaxes and becomes dome-shaped
rib muscles relax, thoracic cavity volume decreases and exhalation occurs
Below the pharynx, which is the correct descending anatomical order?
epiglottis, larynx, trachea, alveoli
Receptors in the breathing center of the medulla oblongata are stimulated by
high carbon dioxide levels
Hemoglobin releases oxygen at the tissues if
temperature increases and the blood is more acidic
During external respiration, the concentration of which increases in blood?
oxyhemoglobkn
