Bio 240: Anatomy & Physiology I Lecture Ex # 1 Summer 2017 Instructor: Dr. Preci
ID: 275892 • Letter: B
Question
Bio 240: Anatomy & Physiology I Lecture Ex # 1 Summer 2017 Instructor: Dr. Precious Alawuru 27. Which pH is more acidic, a pH of 3, a pH of 7, or a pH of ? A. pH of 9 B. pH of 3 C. pH of 7 28. Cortisol is a type of lipid bormone. Which type of lipid would cortisol be classified as? A. steroid B. phospbolipid C. triglyceride 29. What type of compound is NOT likely to dissolve in water? A. nonpolar covalent compound B. ionic compo C. polar covalent compound D. both polar and nonpolar covalent compounds und 30. Which two organ systems work to maintain pH balance in the body? A digestive and respiratory B. urinary and endocrine C. respiratory and urinary D. endocrine and nervous 31. What is the function of a buffer? A. Buffers prevent large swings in pHi when an acid or base is added to a solution. B. Buffers absorb heat without changing temperature themselves Buffers lower the activation energy of a chemical reaction D. Buffers act as a lubricant between two adjacent surfaces 32. Salts are held together by: A. ionic bonds B. polar covalent bonds. C. single covalent bonds D. nonpolar covalent bonds. 33. What is the building block of a lipid? A fatty acid B. glucose C. nucleic acid D. glycogern 34. Amino acids are the monomers for: A. carbohydrates. B. lipids C. nucleic acids D. proteins 35. Which of the following best explains diffusion? A. movenent of molecules from an area of high concentration to an area of low concentration B, movement of molecules farther away from equilíbriim C. movement of molecules from where there are fewer of them to where there are more D. exchange of nonpolar molecules for polar moleculesExplanation / Answer
27.b) pH of 3
28.A) sterois
29.A) non-polar covalent compound
30.C) respiratory and urinary
31.A
32.A) ionic bonds
33.A) fatty acids
34.D) proteins
35.A)
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