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1. Lecture Topic: Negative Feedback (Ch.1)

1. Lecture Topic: Negative Feedback (Ch.1). 1. Which of the following is a component of Homeostasis? A) Positive Feed Back B) Stimulus C) Set Point D) Efferent . B) Stimulus. 2. The need to drink water after having too much salt is an example of? Effector Positive Feed Back

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1. Lecture Topic: Negative Feedback (Ch.1)

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  1. 1. Lecture Topic: Negative Feedback (Ch.1)

  2. 1. Which of the following is a component of Homeostasis? A) Positive Feed Back B) Stimulus C) Set Point D) Efferent

  3. B) Stimulus

  4. 2. The need to drink water after having too much salt is an example of? • Effector • Positive Feed Back • Negative Feed Back • Intergrading Center

  5. C) Negative Feed Back

  6. 3. ________ is the dynamic constancy of internal environment. • Intrinsic Control • Metabolism • Extrinsic Control • Homeostasis

  7. D) Homeostasis

  8. 4. Negative Feed Back always ______ the stimulus. A) Opposes B) Intensifies C) Follows D) Does not Encourage

  9. A) Opposes

  10. 2. Lecture Topic: Acids, Bases and Buffers (Ch.2)

  11. 1. Solution A has a PH of 3 and solution B has a PH of 9, Which of the statement is true? • Solution A has a high H+ Concentration than Solution B • Solution B is Acidic • Solution A is Basic • Solution B acts as a Buffer

  12. A) Solution A has a high H+ Concentration than Solution B

  13. 2. In blood plasma the pH is stabilized by the Bicarbonate Ion (HCO3-) and Carbonic Acid (H2CO3), When Lactic Acid is added blood remains at a pH of 7.40 [+ or - ]0.05 this is an example of a/an:_____? • Enzyme • Buffer • Catalyst • Acid

  14. B) Buffer

  15. 3.Lecture Topic: Types of Chemical Bonds (Ch2)

  16. 1. Water is an example of what type of chemical bond? A) Hydrogen Bond B) Nonpolar C) Ionic Bond D) Complementary Bond

  17. A) Hydrogen Bond

  18. 2. The reaction that uses water to break chemical bonds is? • Dehydration Synthesis • Osmolality • Hydrolysis • Buffer

  19. C) Hydrolysis

  20. 4. Lecture Topic: Meiosis (Ch3)

  21. 1. The Process in which “crossing-over” in meiosis is called: Reduction division Genetic recombination Chromosomal recombination Epigenetic inheritance

  22. b. Genetic recombination

  23. 2. How do meiosis and mitosis differ? • Meiosis is the sexual reproduction of organisms and mitosis is the reproduction of all organisms • Meiosis is the reproduction of all organisms and mitosis in the sexual reproduction of organisms • The number of daughter cells produced for meiosis is 4 haploid cells and mitosis is 2 diploid cells • A and C are correct

  24. d. A and C are correct

  25. 5. Lecture Topic: Characteristics of Enzyme Activity (Ch.4)

  26. 1. An enzyme in the blood can diagnose a disease such as myocardial infarction • True • False

  27. a. True

  28. 2. Enzyme characteristics are: Proteins that catalyze a reaction Enzymes have optimal pH and temperature Usually end in “-ase” All of the above

  29. d. All of the above

  30. 6. Lecture Topic:Glycolysis, Kreb’s Cycle, and ETC (Ch. 5)

  31. 1.What chemical does glycolysis result in? A) acetic acid B) pyruvic acid C) lactic acid D)phosphoric acid

  32. B) Pyruvic acid

  33. 2. What is the net gain of ATP in glycolysis? • 4 • 8 • 3 • 2

  34. D) 2

  35. 3. Where does the Kreb’s cycle take place? • Cytoplasm • Matrix of mitochondria • Outer mitochondrial membrane • Golgi apparatus

  36. B) Matrix of mitochondria

  37. 4. What chemical does the Kreb’s cycle result in? • Citric acid • Acetyl acid • Pyruvic acid • Lactic acid

  38. B) Acetyl acid

  39. Where does the Electron Transport System occur? • Cristae of the mitochondria • Plasma membrane • Skeletal muscle • Intermembrane space

  40. A) Cristae of the mitochondria

  41. In ETC the membrane is _____ to H+ and _____ diffuses through ATP synthase • Impermeable, passively • Permeable, passively • Impermeable, actively • Permeable, actively

  42. A) Impermeable, passively

  43. 7. Lecture Topic: Membrance Potential and Relative Iron concentrations (Ch. 6)

  44. 1. The chemical gradients, electrical gradients and Na+/K+ pumps leave the resting membrane potential ______. • Neutral • Negative • Slightly positive • Extremely positive

  45. B) Negative

  46. 2. What is the relative permeabilty of the membrane for K+? A) 1% B) 0% C) 50-75% D) 100%

  47. C) 50-75%

  48. 8. Lecture Topic:Action Potential, from cell body to axon terminals (Ch. 7)

  49. 1. What voltage do the Na+ channels close at? • -70 mV • -55 mV • 0 mV • +30 mV

  50. D) +30 mV

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