Pnb 2250 Study guides, Class notes & Summaries

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...

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...

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 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 n...

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...

_______________ 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...

PNB 2250 EXAM 1 | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+PNB 2250 EXAM 1 | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+

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 ___...

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 2 | P a g e | G r ...