Bio 152 Unit 3 Exam UPDATED ACTUAL
Exam Questions and CORRECT Answers
Pharynx - CORRECT ANSWER - connects the nose/mouth to esophagus
Larynx - CORRECT ANSWER - connects pharynx to trachea
Trachea - CORRECT ANSWER - connects larynx to bronchial tubes in the lungs
Alveoli - CORRECT ANSWER - tiny air sacs in the lungs that increase surface area
Arteries - CORRECT ANSWER - take blood away from the heart
high pressure
thick walled
Arterioles - CORRECT ANSWER - sphincters that regulate diameter and flow
Capillaries - CORRECT ANSWER - gas and molecule exchange
one cell thick walls
Veins - CORRECT ANSWER - take blood to heart
low pressure
thin walled
Lymphatic System - CORRECT ANSWER - collects interstitial fluid
Systole - CORRECT ANSWER - Contraction of the heart
, Diastole - CORRECT ANSWER - Relaxation of the heart
Pacemaker Cells - CORRECT ANSWER - nodal cells that initiate contraction and regulate
HR
Blood Pressure (and ideal BP) - CORRECT ANSWER - force blood exerts on walls and
vessels
systolic/diastolic
120/80 mmHg
Outline Gas Exchange from ventilation to cellular respiration. Include the movement of oxygen
and carbon dioxide. (diagram) - CORRECT ANSWER - check packet
ventilation -> Diffusion -> Circulation -> Diffusion -> Cellular Respiration
What is partial pressure and how does it change with elevation? - CORRECT ANSWER -
Partial Pressure: pressure of a gas in a mixture
-> decreases with increasing elevation
What is Ficks Law and how is the respiratory system designed to maximize gas diffusion? -
CORRECT ANSWER - Vgas= D*A*(P1-P2)/T
Largest Diffusion occurs when:
-large surface area
-respiratory surface is thin
-partial pressure gradient is large
Outline Human ventilation and how its rate is controlled in response to exercise. - CORRECT
ANSWER - Inhalation: diaphragm contracts, pressure reduces, lungs expand
Exhalation: diaphragm relaxes, pressure increases, lungs relax
1) rising level of CO2 lowers blood pH
Exam Questions and CORRECT Answers
Pharynx - CORRECT ANSWER - connects the nose/mouth to esophagus
Larynx - CORRECT ANSWER - connects pharynx to trachea
Trachea - CORRECT ANSWER - connects larynx to bronchial tubes in the lungs
Alveoli - CORRECT ANSWER - tiny air sacs in the lungs that increase surface area
Arteries - CORRECT ANSWER - take blood away from the heart
high pressure
thick walled
Arterioles - CORRECT ANSWER - sphincters that regulate diameter and flow
Capillaries - CORRECT ANSWER - gas and molecule exchange
one cell thick walls
Veins - CORRECT ANSWER - take blood to heart
low pressure
thin walled
Lymphatic System - CORRECT ANSWER - collects interstitial fluid
Systole - CORRECT ANSWER - Contraction of the heart
, Diastole - CORRECT ANSWER - Relaxation of the heart
Pacemaker Cells - CORRECT ANSWER - nodal cells that initiate contraction and regulate
HR
Blood Pressure (and ideal BP) - CORRECT ANSWER - force blood exerts on walls and
vessels
systolic/diastolic
120/80 mmHg
Outline Gas Exchange from ventilation to cellular respiration. Include the movement of oxygen
and carbon dioxide. (diagram) - CORRECT ANSWER - check packet
ventilation -> Diffusion -> Circulation -> Diffusion -> Cellular Respiration
What is partial pressure and how does it change with elevation? - CORRECT ANSWER -
Partial Pressure: pressure of a gas in a mixture
-> decreases with increasing elevation
What is Ficks Law and how is the respiratory system designed to maximize gas diffusion? -
CORRECT ANSWER - Vgas= D*A*(P1-P2)/T
Largest Diffusion occurs when:
-large surface area
-respiratory surface is thin
-partial pressure gradient is large
Outline Human ventilation and how its rate is controlled in response to exercise. - CORRECT
ANSWER - Inhalation: diaphragm contracts, pressure reduces, lungs expand
Exhalation: diaphragm relaxes, pressure increases, lungs relax
1) rising level of CO2 lowers blood pH
