BMS 300 Exam 4 ACTUAL Exam Questions
and CORRECT Answers
Function of the Respiratory System - CORRECT ANSWER - 1. Gas Exchange
2. pH regulation of blood
How does O2 enter the blood stream? - CORRECT ANSWER - It binds to Fe on
Hemoglobin of erythrocytes
How do we carry CO2 to the lungs - CORRECT ANSWER - In the form of bicarbonate
HCO3- which is facilitated by carbonic anhydrase H2CO3
Functions of Carbonic Anhydrase - CORRECT ANSWER - 1. Regulate pH with H+
2. Remove CO2
Which 4 parts make up the conducting zone? - CORRECT ANSWER - 1. Larynx
(Epithelial Cells)
2. Trachea (Epithelial Cells/ Hyaline Cartilage rings)
3. Bronchi (Epithelial Cells)
4. Bronchioles (smooth muscle wrapped single layer of Epithelial cells)
Bronchiole lumen is called a... - CORRECT ANSWER - mucus membrane. Excess
constriction and mucus cause blockage
Mast cell response in the lungs - CORRECT ANSWER - Antibodies detect allergens and
release histamine which bind to smooth muscle GCPR and cause contraction
Poiselle's law - CORRECT ANSWER - Flow is proportional to r^4 so a little change
increases gas transport
,Visceral and Parietal Pleura - CORRECT ANSWER - Made of mesothelial cells is filled
with fluid to lubricate the lungs and create negative pressure
What makes up the Respiratory zone? - CORRECT ANSWER - 1. Alveoli
2. Type I Pneumocytes
3. Type II Pneumocytes
Anatomy of the Thoracic Cavity - CORRECT ANSWER - 1. Pleural Sac (Parietal Pleura
& Visceral Pleura)
2. Diaphragm
Define: Alveolus - CORRECT ANSWER - single layer of epithelial cells
part of the exchange epithelium
Gas Exchange - CORRECT ANSWER - O2--> air-->blood-->bind to hemoglobin
CO2-->blood-->air
Bicarbonate - CORRECT ANSWER - maintains blood pH
H2O + CO2 <--> HCO3- + H+
Mast (ECL) Cell - CORRECT ANSWER - histamine releasing cell
Epi pen - CORRECT ANSWER - releases Epinephrine
What do inhalers contain? - CORRECT ANSWER - a B2 Agonist.
B2 receptors on Mast Cells cause smooth muscle relaxation
, What does the build up of fluid in the alveolus with minimal diffusion called? - CORRECT
ANSWER - Pneumonia
Type I Pneumocytes - CORRECT ANSWER - gas exchange
Type II Pneumocytes - CORRECT ANSWER - surface tension
secrete surfactant made of Phosphotidyl Choline
hydrophilic and hydrophobic ends
Boyle's Law - CORRECT ANSWER - P1V1 = P2V2
inside the lung
What is special about the pressure in the pleural cavity? - CORRECT ANSWER - It's
always negative.
If theres a hole in the sac, air comes in and lung collapses because its no longer negative
pressure.
If the diaphragm flattens, what happens to the volume of the Thoracic Cavity? - CORRECT
ANSWER - volume increases
Phrenic Nerve - CORRECT ANSWER - A bundle of neurons in the spinal cord that
innervates the diaphragm
Elastic Recoil - CORRECT ANSWER - the passive tendency of the lung to return to its
original shape & position.
and CORRECT Answers
Function of the Respiratory System - CORRECT ANSWER - 1. Gas Exchange
2. pH regulation of blood
How does O2 enter the blood stream? - CORRECT ANSWER - It binds to Fe on
Hemoglobin of erythrocytes
How do we carry CO2 to the lungs - CORRECT ANSWER - In the form of bicarbonate
HCO3- which is facilitated by carbonic anhydrase H2CO3
Functions of Carbonic Anhydrase - CORRECT ANSWER - 1. Regulate pH with H+
2. Remove CO2
Which 4 parts make up the conducting zone? - CORRECT ANSWER - 1. Larynx
(Epithelial Cells)
2. Trachea (Epithelial Cells/ Hyaline Cartilage rings)
3. Bronchi (Epithelial Cells)
4. Bronchioles (smooth muscle wrapped single layer of Epithelial cells)
Bronchiole lumen is called a... - CORRECT ANSWER - mucus membrane. Excess
constriction and mucus cause blockage
Mast cell response in the lungs - CORRECT ANSWER - Antibodies detect allergens and
release histamine which bind to smooth muscle GCPR and cause contraction
Poiselle's law - CORRECT ANSWER - Flow is proportional to r^4 so a little change
increases gas transport
,Visceral and Parietal Pleura - CORRECT ANSWER - Made of mesothelial cells is filled
with fluid to lubricate the lungs and create negative pressure
What makes up the Respiratory zone? - CORRECT ANSWER - 1. Alveoli
2. Type I Pneumocytes
3. Type II Pneumocytes
Anatomy of the Thoracic Cavity - CORRECT ANSWER - 1. Pleural Sac (Parietal Pleura
& Visceral Pleura)
2. Diaphragm
Define: Alveolus - CORRECT ANSWER - single layer of epithelial cells
part of the exchange epithelium
Gas Exchange - CORRECT ANSWER - O2--> air-->blood-->bind to hemoglobin
CO2-->blood-->air
Bicarbonate - CORRECT ANSWER - maintains blood pH
H2O + CO2 <--> HCO3- + H+
Mast (ECL) Cell - CORRECT ANSWER - histamine releasing cell
Epi pen - CORRECT ANSWER - releases Epinephrine
What do inhalers contain? - CORRECT ANSWER - a B2 Agonist.
B2 receptors on Mast Cells cause smooth muscle relaxation
, What does the build up of fluid in the alveolus with minimal diffusion called? - CORRECT
ANSWER - Pneumonia
Type I Pneumocytes - CORRECT ANSWER - gas exchange
Type II Pneumocytes - CORRECT ANSWER - surface tension
secrete surfactant made of Phosphotidyl Choline
hydrophilic and hydrophobic ends
Boyle's Law - CORRECT ANSWER - P1V1 = P2V2
inside the lung
What is special about the pressure in the pleural cavity? - CORRECT ANSWER - It's
always negative.
If theres a hole in the sac, air comes in and lung collapses because its no longer negative
pressure.
If the diaphragm flattens, what happens to the volume of the Thoracic Cavity? - CORRECT
ANSWER - volume increases
Phrenic Nerve - CORRECT ANSWER - A bundle of neurons in the spinal cord that
innervates the diaphragm
Elastic Recoil - CORRECT ANSWER - the passive tendency of the lung to return to its
original shape & position.
