Pnb 2250 - Study guides, Class notes & Summaries

PNB 2250 Exam 1 Study Set Questions and Answers Animals Traits - Ans:--distinguish them from plants and single cell organisms -eukaryotic, multicellular, complex tissues, differentiated tissues -heterotrophic: consume living or dead plants or animals -movement or sessile (stuck to something) Advantages of Multicellularity - Ans:-1. Cells dedicated to specific tasks, increase in efficiency 2. Not all genes expressed, saves energy 3. Cells farther away from surface (easier to maintain home...

PNB 2250 EXAM 4 (final exam review) Study GUIDE stimulus - Ans:-detection by interaction with cellular proteins a change in cellular properties that generates a signal to other cells (chemical and electrical) causes a change in physiological state Control Systems - Ans:-(1) measure (2) compare to desired values (3) compute what changes need to be made ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/60 (4) correct and carry out negative fe...

PNB 2250 EXAM 3 PRACTICE QUESTIONS AND ANSWERS The presence of poly-unsaturated fatty acids in the cell membrane is decreased in larger animals with lower mass-specific metabolic rates(E3) A. true B. false C. this is dependent on animal shape D. This is only true for swimming animals E. this is only true for flying animals - Ans:-A. true A size selective (but not solute selective) nephron filtration barrier ...(E3) A. is very uncommon in vertebrates ©GRACEAMELIA 2024/2025 ACADEMIC YE...

PNB 2250 Exam 3 Questions and Answers – Updated 2024 Of the following, which is NOT a strategy by which endotherms generate internal heat: - Ans:- Panting The minimal metabolic activity required to maintain bodily functions in a mammal is known as the - Ans:-basal metabolic rate. Which of the following thermoregulatory mechanisms can be used to restrict blood flow to the skin, and thus decreases heat loss by keeping the warmed blood closer to the core of the body? - Ans:- vasoconstrict...

PNB 2250 EXAM 1 PRACTICE QUESTIONS AND ASNWERS 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. - Ans:-(e) Early anaerobic...

PNB 2250 Exam 4 (UConn) Questions and Answers Allen's Rule - Ans:-Animal shapes minimizes heat loss in cold climates and heat gain in warm climates Related to surface/volume Arm length in tropical climates longer than arm length in cold climates Might be related to cartilage growth Effects of temperature Isometric growth - Ans:-◦ A change in size w/o a change in proportion ◦ E.g., as an animal doubles in size, the length of the legs also changes in proportion ©GRACEAMELIA 202...

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

PNB 2250 Exam 4 (UConn) Study Guide with Complete Solutions Allen's Rule - Ans:-Animal shapes minimizes heat loss in cold climates and heat gain in warm climates Related to surface/volume Arm length in tropical climates longer than arm length in cold climates Might be related to cartilage growth Effects of temperature Isometric growth - Ans:-◦ A change in size w/o a change in proportion ◦ E.g., as an animal doubles in size, the length of the legs also changes in proportion ◦ ...

PNB 2250 Exam 3 Practice Questions and Answers A fish freshwater....(E3) A. rapidly loses water through the gills B. loses solutes through the gills C. must be an osmoconformer D. actively pumps solutes out of its body through the gills E. must produce a very concentrated urine - Ans:-D The presence of poly-unsaturated fatty acids in the cell membrane is decreased in larger animals with lower mass-specific metabolic rates(E3) A. true ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS R...