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Ivy Tech APHY 201 Exam 1 Questions and
Correct Answers/ Latest Update / Already
Graded
External body surfaces are...
Ans: continuous with the external environment
What are the 6 external body surfaces?
Ans: 1) Nasal and oral passages
2) Respiratory tract
3) GI tract
4) Urinary tract
5) Reproductive tract
6) Ducts of exocrine glands
Internal body surfaces can only be accessed...
Ans: from an internal body fluid
or
by transport across an external membrane
What are the 3 internal body surfaces?
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Ans: 1) Cell membranes of cells within the body
2) Cardiovascular and lymphatic membranes
3) Serous and connective tissue membranes
Membranes divide the body into compartments that...
Ans: maintain separate chemical environments
What is the external face of the membrane?
Ans: the surface facing the environment outside of the body
What is the apical (or huminal) face of the membrane?
Ans: the surface facing the lumen of a hallow structure
What is the basolateral face of the membrane?
Ans: the surface facing the intestinal environment
What are the 7 fluid compartments of the body?
Ans: 1) Blood plasma and lymph
2) Interstitial fluid
3) Intracellular fluid
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4) Fluid in membranous organelles
5) Cerebrospinal fluid
6) Synovial cavities
7) Chambers in eyeballs and ears
Intracellular fluid contains how much of the body's water?
Ans: 2/3 (28L)
Extracellular fluid contains how much of the body's water?
Ans: 1/3 (14L)
(3L blood plasma, 11L interstitial fluid)
Filtration
Ans: Pressure driven (blood pressure and fluid hydrostatic
pressure)
Diffusion
Ans: Driven by concentration gradients
Osmosis
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Ans: Driven by concentration gradients of solutes (only water)
Routes of water loss
Ans: 1) Evaporation from skin and moist membranes, sweat
(+/- 900mL)
2) Feces (+/- 100mL)
3) Urine (+/- 1.5L)
Routes of water gains
Ans: 1) Food, beverages (+/- 2.25L)
2) Metabolism (+/- 250mL)
Primary receptors of the thirst mechanism
Ans: Hypothalamic receptor neurons signal the thirst center
when blood plasma osmolarity > 280 mOsm
Secondary receptors of the thirst mechanism
Ans: Osmoreceptors in the mouth detect low volume and
increase concentration of saliva
Integrating center
All rights reserved © 2025/ 2026 |
Ivy Tech APHY 201 Exam 1 Questions and
Correct Answers/ Latest Update / Already
Graded
External body surfaces are...
Ans: continuous with the external environment
What are the 6 external body surfaces?
Ans: 1) Nasal and oral passages
2) Respiratory tract
3) GI tract
4) Urinary tract
5) Reproductive tract
6) Ducts of exocrine glands
Internal body surfaces can only be accessed...
Ans: from an internal body fluid
or
by transport across an external membrane
What are the 3 internal body surfaces?
All rights reserved © 2025/ 2026 |
, Page |2
Ans: 1) Cell membranes of cells within the body
2) Cardiovascular and lymphatic membranes
3) Serous and connective tissue membranes
Membranes divide the body into compartments that...
Ans: maintain separate chemical environments
What is the external face of the membrane?
Ans: the surface facing the environment outside of the body
What is the apical (or huminal) face of the membrane?
Ans: the surface facing the lumen of a hallow structure
What is the basolateral face of the membrane?
Ans: the surface facing the intestinal environment
What are the 7 fluid compartments of the body?
Ans: 1) Blood plasma and lymph
2) Interstitial fluid
3) Intracellular fluid
All rights reserved © 2025/ 2026 |
, Page |3
4) Fluid in membranous organelles
5) Cerebrospinal fluid
6) Synovial cavities
7) Chambers in eyeballs and ears
Intracellular fluid contains how much of the body's water?
Ans: 2/3 (28L)
Extracellular fluid contains how much of the body's water?
Ans: 1/3 (14L)
(3L blood plasma, 11L interstitial fluid)
Filtration
Ans: Pressure driven (blood pressure and fluid hydrostatic
pressure)
Diffusion
Ans: Driven by concentration gradients
Osmosis
All rights reserved © 2025/ 2026 |
, Page |4
Ans: Driven by concentration gradients of solutes (only water)
Routes of water loss
Ans: 1) Evaporation from skin and moist membranes, sweat
(+/- 900mL)
2) Feces (+/- 100mL)
3) Urine (+/- 1.5L)
Routes of water gains
Ans: 1) Food, beverages (+/- 2.25L)
2) Metabolism (+/- 250mL)
Primary receptors of the thirst mechanism
Ans: Hypothalamic receptor neurons signal the thirst center
when blood plasma osmolarity > 280 mOsm
Secondary receptors of the thirst mechanism
Ans: Osmoreceptors in the mouth detect low volume and
increase concentration of saliva
Integrating center
All rights reserved © 2025/ 2026 |
