Ch 23 and 24 test Flashcards
5 functions of respiratory system
- gas exchange
- move air to and from lungs
- protect and defend
- produce sounds
- smell
conducting portion of resp tract
anatomical dead space that goes from nasal passage through pharynx, larynx, trachea, bronchi, and large bronchioles
respiratory portion of resp tract
conducts gas exchange, includes bronchioles and alveoli
cell placement and function: mucosa of respiratory tract
- pseudostratefied ciliated columnar
- stratefied squamous
- cuboidal with cilia
- simple squamous
- most of tract, remove debris
- areas shared w digestive tract, abrasion from food
- bronchioles, remove debris
- alveoli, gas exchange
3 resp defenses
- goblet cells-mucous
- nasal hair-filter
- alvolar macrophages
function of sinuses
warm and humidify air, defense
3 parts of pharynx
- nasopharynx
- oropharynx
- laryngopharynx
superior portion of pharynx, holds pharyngeal tonsil, pseudostratefied ciliated columnar
nasopharynx
cartilaginous tube that surrounds and protects the glottis
larynx
glottis
opening of larynx
thyroid cartilage
large anterior shied of larynx, AKA adam’s apple
cricoid cartilage
forms entrance to trachea and protects posterior larynx
arytenoid cartilage
aid in phonication
vestibular folds
false vocal cords for protection
vocal folds
true vocal cords
trachealis muscle
changes size of trachea
primary bronchi
right and left branches that go to each lung
carina
seperating point at inferior of trachea
root
entrance to each lung at hilus, contains bronchi and blood vessels
secondary bronchi
lobar, bronch to lobes of lung
3-right, 2-left
tertiary bronchi
segmental, branch to the bronchopulmonary segments of lobes
10-right, 8/9-left
bronchioles
smallest segments branching off tertiary bronchi
terminal bronchioles
no cartilage, end of conducting system/dead space, where bronchodilation and constriction have greatest effect
respiratory bronchioles
begin gas exchange
right lung lobes
- superior
- middle
- inferior
left lung lobes
- superior
2. inferior
oblique fissure
separates superior and inferior lobes of left lung and superior and middle lobes from inferior on right
horizontal fissure
separates superior and middle lobes on right lung
alveolar ducts
connect resp bronchioles to alveolar sacs
alveoli cell- type 1
site of gas diffusion
alveoli cell- type 2
septal cells that produce surfectant
surfectant
chemical to decrease surface tension on alveolar membrane
how does gas exchange occur in cells
diffusion
external respiration
exchange of gasses between the interstitial fluids and external environment
3 phases of external respiration
- pulmonary ventilation
- gas diffusion
- transport of O2 and CO2
Boyle’s law
pressure= 1/volume of gas
to change the pressure, change the volume
eupenia
quiet breathing
quiet breathing muscles-2
diaphragm and external intercostals
hyperpenia
forced breathing
forced breathing muscles-6
diaphragm, external intercostals, sternocleidomastoid, serratus anterior, pectoralis minor, scalenes
quiet breathing exhalation
muscles relax- elastic rebound
forced breathing exhalation muscles
internal intercostals, abdominal muscles
compliance rib cage mobility- 3 factors
- connective tissue of lungs
- level of surfactant produced
- mobility of thoracic cage
external environment pressure 1 ATM
760mmHg
quiet breathing pressure
759-inhale
761-exhale
forced breathing pressure
730 inhale
860 exhale
intrapleural pressure
-4 to allow for expansion
air enters pleural cavity due to penetrating injury of chest wall or a rupture of alveoli that breaks through visceral pleura
pneumothorax
atelectasis
collapsed lung
respiratory rate for adults
12-15 breaths a minute
minute volume
RRxTV
tidal volume
movement of air during normal quiet breathing-500ml
expiratory reserve volume- ERV
extra amount you can expel on forced breathing-1000ml
residual volume
air that remains in the lungs after forced exhalation-1200
inspiratory reserve volume- IRV
air you can forcefully inhale-3300ml
inspiratory capacity
total air you can take in
TV+IRV
vital capacity
IRV+ERV+TV=4800ml
Dalton’s law
partial pressures of gasses, each gas in a sample exhibits a pressure that contributes to the overall pressure of the gas
Henry’s law
the partial pressure of a gas is directly proportional to the amount of gas in a solution
5 factors that impact gas exchange efficiency
- difference in pressures across membrane
- small thickness of membrane
- gases are lipid soluble
- large surface area
- blood flow and air flow are coordinated
oxyhemoglobin
oxygenated hemoglobin in RBC
once an oxygen molecule binds to hemoglobin it is easier for the next one to bind
training effect
Bohr effect
Ph has an effect on release of oxygen- acidic=more O2 release
a compound generated by the formation of ATP in an RBC by glycolysis, more compound=O2 drop off increases
BPG
3 methods of CO2 transport
- Carbonic acid- 70%
- Carbaminohemoglobin- 23%
- plasma diffusion-7%
respiratory centers of medulla oblongata-2
- dorsal respiratory group
2. ventral respiratory group
dorsal respiratory group- DRG
stimulates inspiration with quiet and forced breathing
ventral respiratory group- VRG
works only on forced breathing
pons response to receptor stimuli-2
- apneustic center
2. pneumotaxic center
apneustic center
modifies the depth of breathing and stimulates the DRG constantly
pneumotaxic center
modifies the rate of breathing and stimulates the VRG
hypercapnia
increase in the PCO2, hypoventilation is cause
hypocapnia
low PCO2, hyperventilation is cause
Hering-Brewer reflex
inflation reflex prevents overexpansion of the lungs during inhalation