Pnb 2250 exam - 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 oxygen toxici...

PNB 2250 EXAM 1 QUESTIONS WITH 100% PERFECT ANSWERS BASED ON LECTURES 1-7

PNB 2250 Exam 3 UCONN Questions And Answers With Real Tests The loss of digestive wastes, CO2 and NH4+ are examples of _______________. ANS excretion The regulation of H2O and solutes is via ___________________. ANS osmoregulation Water moves from an area of ________ (low, high) osmolarity to an area of __________ (low, high) osmolarity ANS low, high ___________: a chemical dissolved in a solvent (H2O is the only solvent we are interested in) [6.02]. ___________s occupy space within...

Name an animal that has neither a circulatory system nor a respiratory system and relies solely on cutaneous diffusion for gas exchange. How is this adequate for its survival? - Small and thin animals, like flatworms and horsehair worm parasites, have no respiratory or circulatory systems and solely rely on cutaneous/cuticle diffusion through water or air. Examples of respiratory structures of aquatic animals - bulk flow (sponges, cnidarians), gills, water vascular system, arborescent respi...

Respiratory proteins ...(E1) a. increase the carbon dioxide carrying capacity of water up to 50-fold. b. have a fixed affinity for oxygen c. depend on carbonic anhydrase to transport oxygen d. must contain iron. e. are not accurately described by any of the above statements - (e) are not accurately described by any of the above statements What is an advantage of a closed circulatory system? (E1) a. Blood can flow in any direction within a blood vessel. b. It requires less blood volume t...

control system components of homeostasis - (1) sensor (protein based) (2) controller (3) effector (changes physiological variable) physical factors of animals - (1) energy input (cost/benefit ratio) (2) waste removal (3) growth and development (4) impacts of physics, chemistry, geometry on body form 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 - flig...

PNB 2250 EXAM 1-4 Questions (Final Review) Questions And Answers Latest Top Score. Which statement is true? (E1) 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 min...

PNB 2250 Exam 1 Questions And Answers Plant specific cell to cell connections ANS plasmodesma animal specific cell to cell connections ANS tight junctions What systems are able to exist because of multicellularity? ANS Control systems and distribution What organisms have the highest number of genes? ANS Plants Why is the fossil record incomplete? ANS loss of soft tissue and DNA What is the extant ancestor to animals? ANS Choanoflagellate

what animals must do? - - Mechanism for excreting waste - Mechanism for development and growth - Energy input Disadvantage of multicellularity - Need special cell/cell connections Need for cell/cell communication Need system for distribution of nutrients What traits to animals share? - Eukaryotic, heterotrophic, able to move Why is the fossil record incomplete? - Needs to die near water, fossilization process needs to be in a situation where there's no oxygen present, rapidly covered in...

What traits to animals share? -:- Eukaryotic, heterotrophic, able to move Cell to cell connections in plants -:- Plasmodesmo, flow of nutrients between cells Cell to cell connections animals -:- Tight junctions, strong connection Some multicellularity advantages -:- Cells have dedicated tasks (increase efficiency) Not all genes expressed (saves energy) Cells are further away from surface, ease on homeostasis Disadvantage of multicellularity -:- Need special cell/cell connections ...