Pnb 2250 exam - Study guides, Class notes & Summaries
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PNB 2250 Exam 3 Questions and Correct Answers | Latest Update
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Examples of respiratory structures of terrestrial animals 
 -:- bulk flow with tracheal system and spiracles (insects), cutaneous 
(frog) 
Examples of respiratory structures of aquatic animals 
 -:- bulk flow (sponges, cnidarians), gills, water vascular system, 
arborescent respiratory trees (sea cucumber), cutaneous (leech) 
Do all aquatic animals necessarily exchange gasses in water? 
 -:- No, some aquatic animals could exchange gasses above water using 
lungs, like aquatic mammals, or cuta...
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PNB 2250 EXAM 1 Questions and Correct Answers | Latest Update
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Which statement is true? 
a. Heme is commonly found within seawater 
b. Heme-based proteins played a key role in the metabolism of carbon dioxide into forms 
less toxic to cells. 
c. Heme-based proteins likely developed as a means by which Fe was transported safely. 
d. Oxygen binding to heme is insensitive to the presence of acid in mammals. 
e. Early anaerobic life used heme-based proteins to minimize oxygen toxicity. 
 -:- (e) Early anaerobic life used heme-based proteins to minimize 
oxyg...
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PNB 2250 Exam 1 (final exam prep) Questions and Correct Answers | Latest Update
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cell to cell connection (in animals vs. plants) 
 -:- plants = plasmodesmata, flow of nutrients between cells 
 animals = tight junctions 
convergent evolution 
 -:- organisms independently evolve similar traits as a result of having to 
adapt to similar environments 
limited solutions to the same problem 
analogous structures 
 -:- flight in insects, bats, birds 
fingerprints in humans and koalas 
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PNB 2250 EXAM 1 QUESTIONS WITH 100 % CORRECT ANSWERS |VERIFIED
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three frameworks of comparative systems - -Form & function of the parts under investigation 
-Phylogenetic diversity & evolution of the system in different taxa 
-Ecophysiology 
Tech designs vs living systems - -Technological advancement is an evolutionary progression 
-Organisms are impressive, beautiful & awe-inspiring 
>Exceedingly complex in architecture & functional adaptations 
>Appropriate to speak of life forms having "design" 
Emergent properties of animal physiology - - Atoms 
...
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PNB 2250 Exam 2 With Questions And Answers Graded A+
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How is filter feeding an example of ecosystem engineering? - helps clarify oceans 
Oysters in Chesapeake Bay filter the water 
Disadvantages to Feeding - must have larger mouth and machinery to breakdown food particles 
requires time so pathway is longer 
Where is the fuel from food acquired? - chemical bonds 
energy was used to make bonds, and will be released when it is broken 
Homeostasis - maintenance of internal environment 
Basal Metabolic Rate (BMR) - amount of energy expended when at res...
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PNB 2250 EXAM 1 | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+PNB 2250 EXAM 1 | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+
- Exam (elaborations) • 28 pages • 2024
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PNB 2250 EXAM 1 | QUESTIONS & 
ANSWERS (VERIFIED) | LATEST 
UPDATE | GRADED A+PNB 2250 EXAM 1 | QUESTIONS & 
ANSWERS (VERIFIED) | LATEST 
UPDATE | GRADED A+
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PNB 2250 EXAM 1 Questions and Correct Answers | Latest Update
- Exam (elaborations) • 13 pages • 2024
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Emergent properties of animal physiology 
 -:- - Atoms 
- Molecules 
- Cells 
- Tissues 
- Organs 
- Integrated organ systems 
Physiological tolerances affects the _________ & ___________ of species. 
Physiology also influences higher levels of biological organization (4 things): 
 -:- distribution, abundance 
-Population 
-Community 
-Ecosystem 
-Biome 
2 | P a g e | G r a d e A + | 2 0 2 4 / 2 0 2 5 
2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain | Excel! 
Evolving...
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PNB 2250 Exam 3 Uconn Latest Update with complete solution
- Exam (elaborations) • 5 pages • 2024
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_______________ have a single or multiple solute binding pockets and after solute binding, a reversible 
conformation movement exposes the solute-binding pocket to the other face of the membrane. - 
transporters 
Because of the factors affecting diffusion, H2O will move from an area of higher concentration (low 
osmolarity) to an area of lower concentration (higher osmolarity) if the cell membrane is permeable to 
H2O [6.03]. The movement of H2O in this way is a very powerful force, capable of r...
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PNB 2250 Exam 3 Uconn Questions and Correct Answers | Latest Update
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The loss of digestive wastes, CO2 and NH4+ are examples of _______________. 
 -:- excretion 
The regulation of H2O and solutes is via ___________________. 
 -:- osmoregulation 
Water moves from an area of ________ (low, high) osmolarity to an area of __________ 
(low, high) osmolarity 
 -:- low, high 
___________: a chemical dissolved in a solvent (H2O is the only solvent we are interested 
in) [6.02]. ___________s occupy space within H2O 
 -:- solute 
Osmolarity : measure of the number of ___...
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PNB 2250 Exam 2 Questions and Correct Answers | Latest Update
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Animals must provide ____ (4) for food processing 
 -:- .path for intake 
 chemical & mechanical digestion 
 reabsorption of nutrients 
 loss of waste products 
Where is the fuel from food acquired? 
 -:- chemical bonds 
energy was used to make bonds, and will be released when it is broken 
Homeostasis 
 -:- maintenance of internal environment 
Basal Metabolic Rate (BMR) 
 -:- amount of energy expended when at rest in a neutral environment, 
with an inactive digestive system 
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