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36 terms

Test 3 Questions

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Glomerular Filtrate Rate per minute
120-125 ml
Hemoglobin-oxygen affinity
decreases as blood pH decreases
Bronchoconstriction
Constriction, or blockage, of the bronchi that lead from the trachea to the lungs.
Vital Capacity
the total amount of exchangeable air in the lungs
Diaphragm
requires nervous stimulation to contract
Renin
secretion would increase if blood pressure decreased
Nitrogen
most prevalent gas in the atmosphere
Heimlich Maneuver
causes increased intrapulmonary pressure and decreased thoracic volume
Drinking alcohol causes:
decreased ADH levels, so the collecting ducts cannot reabsorb alot of water
Quiet breathing
inhalations involve muscular contractions and exhalation is passive
Afferent arteriole
if it constricts, glomerular hydrostatic pressure decreases
3 main factors affecting pulmonary ventilation
lung compliance, airway resistance, and surface tension
Proximal convoluted tubule
where most reabsorption occurs
Ascending Loop
NaCl only is reabsorbed here
Descending Loop
Water only is reabsorbed here
Maintain Blood Pressure
main function of angiotensin-renin system
Movement of Secretion
from blood to the lumen of the nephron
Partial Pressure
determines the direction of gas movement across a membrane
Type 2 Cells
produce surfactant
Surfactant
used to decrease surface tension in alveoli
Buffer Systems
first system to respond to an acid/base imbalance
Increase in Aldosterone leads to:
increase in Na reabsorption and increase in K+ secretion
Respiratory Acidosis
hypoventilation leads to this
3 factors affecting net filtration
colloid osmotic pressure, glomerular hydrostatic pressure, and capsular hydrostatic pressure
Control of Involuntary Respiration
medulla oblongata and pons
Extracellular Buffers
carbonic acid and bicarbonate
Increased Intrapulmonary Pressure
in order for expiration to occur, this needs to happen
Respiratory gas exhange
at the level of the tissues, oxygen diffuses into the tissues and carbon dioxide diffuses into the blood
Afferent Arteriole Constriction
prevents an increase in GFR
Partial Pressure of CO2
the primary chemical influence on ventilation
Tidal Volume
the volume of air breathed out in a normal breath
Expiratory Reserve Volume
the volume of air that can be forcibly exhaled after a normal expiration
Residual Volume
the amount of air left in the lungs after a forced expiration
Diuresis
enhanced urine output
Respiratory System
body system that can increase or decrease plasma CO2 levels
The Kidneys
the body organ that can most directly increase or decrease plasma bicarbonate levels