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Respiratory System 2

respiratory system

PO2 is partial pressure of oxygen
PCO2 partial pressure of Carbon Dioxide
air on the arterial side contains much higher PO2
air on the arterial side contains much lower PCO2
Higher PO2 and PCO2 allow for oxygen to diffuse into the capillary
Higher PO2 and PCO2 allow carbon dioxide to diffuse out of capillary, after which it is exhaled
P is partial pressure of a gas
Tissue PO2 stays at approximately 40 mm Hg
Hg is mercury
when not breathing pressure inside the lungs is same or different same
atmospheric pressure in 760 mm HG
PV stands for pressure and volume
if lung pressure goes up volume goes.... down
if lung pressure goes down, volume goes up
the pressure within the lungs drops .... mm HG during inspiration
during inspiration mm HG is 758
the diaphragm comes up or drops down during inspiration drops down
Type ii alveolar cells secretee lipoprotein
lipoprotein substances is called surfactant
are surfactants a dry or oily substances oily
inside the alveoli,water tension does what pulls inward on the alveolus
why does water tension pull inwards on the alveolus it is trying to collapse it
...... breaks surface tension surfactant
why is it important to have surfactant breaks surface tension to prevent collapse of the alveoli
fetal lung produce very little surfactant
when born premature the lung are difficult to expand and alveoli may collapse due to surface tension
during respiratory distress syndrome what can be inserted in the lung artificial surfactant
In the brain stem, what contains respiratory centers to control breathing pons & medulla oblongata
what controls the rate of breathing pons and medulla oblongata
what 2 nerves control over breathing phrenic & vagus
diaphragm contracts via the phrenic nerve
sensory information from the lungs travels back to the brain via vagus nerve
what nerve tells the brain houw stretched the lung are and not to over stretch them vagus nerve
carbon dioxide is an acid
the higher the acidity the .... the ph lower
can receptors in the brain detect blood chemistry changes in breathing yes
the receptors in the brain that detect the changes in blood chemistry that affect breathing are called central chemoreceptors
ph will go up or down as PCO2 increases down
if ph drops below 7.4 this change is detected in the medulla oblongata, true or false true
what is detected in the medulla oblongata changes in ph levels
what causes an increase in respiration ph drop below 7.4
Receptors in the arota and carotid arteries detect changes in oxygen concentration
receptors in the aorta are called aortic bodies
receptors in the carotid ateries are called carotid bodies
what receptors send sensory information arotic and carotid bodies
sensory information is sent via what nerve vagus and glossopharyngeal nerve
the vegus and glossopharyngeal nerves send information to the medulla oblongata
low oxygen will trigger stimulation of ........ aorta and carotid receptors
when low oxygen trigger stimulation of receptors this will increase respiration
Tidal volume amount of air moved during a breath 500ml
inspiration reserve volume additional inspiration lung volume not used at rest 3000ml
expiratory reserve volume additional expiration lung volume not used at rest 1100ml
residual volume (dead space) set amount of air in lungs after maximum expiration 1200ml
vital capacity maximum tidal volume... max amount of air 4600ml
total lung capacity 5800ml
vital capacity is equal to inspiration reserve + tidal volume + expiratory reserve volune
total lung capacity is equal to Inspiratory reserve + tidal volume + expiratory reserve volume + residual volume (dead space) aq
hemoglobin saturation is amount of oxygen bound to hemoglobin
what affect hemoglobin saturation PCO2, ph and temperature
an increased PCO2 causes more dissociation of oxygen from hemaglobin
as ph decreases, hemoglobin saturation decreases
an increase in PCO2 causes decrease in ph
a decrease in ph causes more oxygen to dissociate
ph is dependent on more than just CO2
is hemoglobin saturation inversely proportional to temperature yes
increased tempurature is degreased hemoglobin saturation
body temp in celius 37-38
asthma is a condition of what trachea and bronchi lumen
what happens when you have asthma inflammation and mucous production, muscle contraction and lumen decreases in size
emphysema is a condition of alveolar walls rupture, creating larger spaces but less surface area for gas exchanges
emphysema increases surface area for gas exchange false
what reduces elasticity of lung, resulting in difficulty exhaling emphysema
Created by: Miccimouse
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