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Ivy Tech APHY 201 Exam 1 questions with answers,

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Ivy Tech APHY 201 Exam 1 questions with
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answers

External body surfaces are... - CORRECT ANSWERS
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✔✔continuous with the external environment \| \| \| \|

What are the 6 external body surfaces? - CORRECT ANSWERS
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✔✔1) Nasal and oral passages
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2) Respiratory tract
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3) GI tract
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4) Urinary tract
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5) Reproductive tract
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6) Ducts of exocrine glands
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Internal body surfaces can only be accessed... - CORRECT
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ANSWERS ✔✔from an internal body fluid\| \| \| \| \|

or
by transport across an external membrane
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What are the 3 internal body surfaces? - CORRECT ANSWERS
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✔✔1) Cell membranes of cells within the body
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2) Cardiovascular and lymphatic membranes
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3) Serous and connective tissue membranes
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,Membranes divide the body into compartments that... -
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CORRECT ANSWERS ✔✔maintain separate chemical
\| \| \| \| \|

environments

What is the external face of the membrane? - CORRECT
\| \| \| \| \| \| \| \| \| \|

ANSWERS ✔✔the surface facing the environment outside of the
\| \| \| \| \| \| \| \| \|

body

What is the apical (or huminal) face of the membrane? -
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CORRECT ANSWERS ✔✔the surface facing the lumen of a hallow
\| \| \| \| \| \| \| \| \| \|

structure

What is the basolateral face of the membrane? - CORRECT
\| \| \| \| \| \| \| \| \| \|

ANSWERS ✔✔the surface facing the intestinal environment
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What are the 7 fluid compartments of the body? - CORRECT
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ANSWERS ✔✔1) Blood plasma and lymph
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2) Interstitial fluid
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3) Intracellular fluid
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4) Fluid in membranous organelles
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5) Cerebrospinal fluid
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6) Synovial cavities
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7) Chambers in eyeballs and ears
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Intracellular fluid contains how much of the body's water? -
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CORRECT ANSWERS ✔✔2/3 (28L)
\| \| \|

,Extracellular fluid contains how much of the body's water? -
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CORRECT ANSWERS ✔✔1/3 (14L) \| \| \|

(3L blood plasma, 11L interstitial fluid)
\| \| \| \| \|

Filtration - CORRECT ANSWERS ✔✔Pressure driven (blood
\| \| \| \| \| \| \|

pressure and fluid hydrostatic pressure)
\| \| \| \|

Diffusion - CORRECT ANSWERS ✔✔Driven by concentration
\| \| \| \| \| \| \|

gradients

Osmosis - CORRECT ANSWERS ✔✔Driven by concentration
\| \| \| \| \| \| \|

gradients of solutes (only water) \| \| \| \|

Routes of water loss - CORRECT ANSWERS ✔✔1) Evaporation
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from skin and moist membranes, sweat (+/- 900mL)
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2) Feces (+/- 100mL)
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3) Urine (+/- 1.5L)
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Routes of water gains - CORRECT ANSWERS ✔✔1) Food,
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beverages (+/- 2.25L) \| \|

2) Metabolism (+/- 250mL)
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Primary receptors of the thirst mechanism - CORRECT ANSWERS
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✔✔Hypothalamic receptor neurons signal the thirst center when \| \| \| \| \| \| \| \|

blood plasma osmolarity > 280 mOsm
\| \| \| \| \|

, Secondary receptors of the thirst mechanism - CORRECT\| \| \| \| \| \| \| \|

ANSWERS ✔✔Osmoreceptors in the mouth detect low volume
\| \| \| \| \| \| \| \|

and increase concentration of saliva
\| \| \| \|

Integrating center - CORRECT ANSWERS ✔✔Hypothalamic thirst\| \| \| \| \| \| \|

center

Stimulation of the thirst center causes... - CORRECT ANSWERS
\| \| \| \| \| \| \| \| \|

✔✔1) Stimulation of water-seeking behaviors through the
\| \| \| \| \| \| \|

cerebral cortex \|

2) Increased water conservation by the kidneys, through ADH
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from the posterior pituitary
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Temporary cessation of thirst - CORRECT ANSWERS \| \| \| \| \| \| \|

✔✔Moistening of oral osmoreceptors (inhibits hypothalamic thirst \| \| \| \| \| \| \|

center only as long as the mouth remains moist)
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Long term cessation of thirst - CORRECT ANSWERS ✔✔Return to
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normal plasma osmolarity (strongly inhibits thirst center; as long
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as plasma osmolarity remains normal, thirst is fully inhibited)
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Renal response - CORRECT ANSWERS ✔✔Cannot fix dehydration;
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only reduces water loss
\| \| \|

(reduces filtrate formation and increases water absorption from
\| \| \| \| \| \| \| \|

the urine)
\|

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Course: APHY 201

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Uploaded on: July 13, 2025
Number of pages: 32
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