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APHY 201 - Exam 5 Questions and Correct
Answers/ Latest Update / Already Graded
Describe how flow of a gas or liquid is created. What determines
amount of flow?
Ans: If flowing from one area to another, pressure decreases as
length of distance increases. Depends on DIFFERENCE OF
PRESSURE from one area to next
Define pressure
Ans: force exerted by gas or liquid against walls or container
State the behavior of gases in a container; relate to Boyle's Law
Ans: As volume decreases, pressure increases. Pressure within
system changes inversely with volume
Describe factors that determine pressure of a liquid
Ans: Hydrostatic pressure: pressure of liquid outwards against
container
Flow: kinetic energy of fluid movement
Differentiate bt flow rate and velocity of flow
All rights reserved © 2025/ 2026 |
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Ans: Flow rate: how MANY molecules are being received
Velocity: how fast a molecule moves
How do changes in tube diameter affect flow rate and velocity?
Ans: Flow rate is greater in LARGER diameter tubes
Velocity is greater in SMALLER diameter tubes
Define resistance to flow and how it's created
Ans: Opposition to flow. Created by friction bt walls and
molecules
3 factors that affect flow through tubes; how do each change
resistance
Ans: Tube radius: as tube diameter decreases, flow resistance
increases
Tube length: as tube length increases, flow resistance increases
gas or fluid viscosity: as viscosity increases, flow resistance
increases
How is total cross sectional area calculated? How does it affect
resistance to flow?
All rights reserved © 2025/ 2026 |
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Ans: tube diameter x number of tubes
resistance decreases as total cross sectional area increases
List the factors that determine amount of blood flow to any specific
area
Ans: Vessel length, vessel diameter, and number of vessels
Describe the behavior of the heart; related to movement of blood
Ans: pumping action is the pressure gradient source
What is the heart's primary responsibility?
Ans: Receive deoxygenated blood and oxygenate it - move to
lungs - meet demands for oxygen and nutrients - work with
vascular system to maintain proper flow rate and volume
Function of autorhythmic cells
Ans: determine HR; number of times per minute volume is
moved into pulmonary and systemic circuits
Autorhythmic elements of heart (in order)
Ans: SA node
All rights reserved © 2025/ 2026 |
APHY 201 - Exam 5 Questions and Correct
Answers/ Latest Update / Already Graded
Describe how flow of a gas or liquid is created. What determines
amount of flow?
Ans: If flowing from one area to another, pressure decreases as
length of distance increases. Depends on DIFFERENCE OF
PRESSURE from one area to next
Define pressure
Ans: force exerted by gas or liquid against walls or container
State the behavior of gases in a container; relate to Boyle's Law
Ans: As volume decreases, pressure increases. Pressure within
system changes inversely with volume
Describe factors that determine pressure of a liquid
Ans: Hydrostatic pressure: pressure of liquid outwards against
container
Flow: kinetic energy of fluid movement
Differentiate bt flow rate and velocity of flow
All rights reserved © 2025/ 2026 |
, Page |2
Ans: Flow rate: how MANY molecules are being received
Velocity: how fast a molecule moves
How do changes in tube diameter affect flow rate and velocity?
Ans: Flow rate is greater in LARGER diameter tubes
Velocity is greater in SMALLER diameter tubes
Define resistance to flow and how it's created
Ans: Opposition to flow. Created by friction bt walls and
molecules
3 factors that affect flow through tubes; how do each change
resistance
Ans: Tube radius: as tube diameter decreases, flow resistance
increases
Tube length: as tube length increases, flow resistance increases
gas or fluid viscosity: as viscosity increases, flow resistance
increases
How is total cross sectional area calculated? How does it affect
resistance to flow?
All rights reserved © 2025/ 2026 |
, Page |3
Ans: tube diameter x number of tubes
resistance decreases as total cross sectional area increases
List the factors that determine amount of blood flow to any specific
area
Ans: Vessel length, vessel diameter, and number of vessels
Describe the behavior of the heart; related to movement of blood
Ans: pumping action is the pressure gradient source
What is the heart's primary responsibility?
Ans: Receive deoxygenated blood and oxygenate it - move to
lungs - meet demands for oxygen and nutrients - work with
vascular system to maintain proper flow rate and volume
Function of autorhythmic cells
Ans: determine HR; number of times per minute volume is
moved into pulmonary and systemic circuits
Autorhythmic elements of heart (in order)
Ans: SA node
All rights reserved © 2025/ 2026 |
