Phys Lab Quiz 5

Ventilation

exchange of air between atmosphere and alveoli

Alveoli

saclike dilation; site of gas exchange with the blood

Intrapulmonary Space

space within air sacs and airways

Intrapleural Space

potential space between the visceral and parietal linings

Transpulmonary Pressure

pressure difference keeping the lungs against the chest wall

Lung Compliance

change in lung volume per change in transpulmonary pressure

Elasticity

tendency of a structure to recoil to its initial dimensions after being distended

Surfactant

reduces surface tension between fluid and alveolar surface

Diaphragm

primary muscle of ventilation

Partial Pressure

pressure of a particular gas in a mixture

Chemoreceptor

receptor sensitive to chemical changes such as pH

Acidosis

increase in H+ concentration of the blood that lowers pH

Alkalosis

decrease in H+ concentration of the blood that raises pH

Oxyhemoglobin

oxygen bound on hemoglobin

Deoxyhemoglobin

produced when oxyhemoglobin releases oxygen

Hypoventilation

plasma concentration of CO2 is abnormally increased

Hyperventilation

high rate and depth of breathing resulting in a decrease in blood CO2 concentration below normal

Type 1 Alveolar Cell

forms a continuous layer lining the air facing surface of the pulmonary alveoli

Type 2 Alveolar Cell

pulmonary cells that produce surfactant

Boyles Law

pressure of a given quantity of a gas is inversely proportional to its volume

Micturition

urination

Guarding Reflex

somatic motor neurons stimulate external urethral sphincter

Voiding Reflex

somatic motor neurons inhibit external urethral sphincter

Nephron

functional unit of the kidneys

Glomerular Capsule

site of initial filtration

Proximal Convoluted Tubule

major site of reabsorption

Loop Of Henle

permeability changes divides tubule into descending and ascending portions

Distal Convoluted Tubule

largely does secretion

Collecting Duct

location of ADH binding

Filtrate

fluid entering the glomerular capsule