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QUESTION 1A

QUESTION 1A. Out of the four components of homeostasis, what component carries out the directions given by the integrating center? Stimulus Integrating Center Sensor Effector. Answer to Q 1A. D) Effector. Question 1B.

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QUESTION 1A

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  1. QUESTION 1A Out of the four components of homeostasis, what component carries out the directions given by the integrating center? Stimulus Integrating Center Sensor Effector

  2. Answer to Q 1A • D) Effector

  3. Question 1B • What mechanism requires a sensor that can detect a change in the internal environment? • A) Positive Feedback • B) Negative Feedback • C) Integrating Center • D) Dynamic Constancy

  4. Answer to Q 1B • B) Negative Feedback

  5. 2A. What is a hydrogen donor? • (a) base • (b) acid • (c) buffer • (d) electrolyte

  6. 2A. What is a hydrogen donor? • (a) base • (b) acid • (c) buffer • (d) electrolyte

  7. 2B. What system of ions and molecules is used to prevent major changes in H+ • Acid • Base • pH • Buffer

  8. 2B. What system of ions and molecules is used to prevent major changes in H+ • Acid • Base • pH • Buffer

  9. 3A. Which is the strongest chemical bond? Covalent Bond Ionic Bond Hydrogen Bond All of the above

  10. A. Covalent Bond

  11. 3B. Which of the following chemical bonds does NOT share its electrons? • Covalent Bond • Ionic Bond • Hydrogen Bond • None of the above

  12. B. Ionic Bond

  13. 3C. When bonding with water, which chemical bond is responsible for many of the biologically important properties of water? • Hydrogen Bond • Ionic Bond • Covalent Bond • All of the Above

  14. A. Hydrogen Bond

  15. 5A. In order for a given reaction to occur with an enzyme, the reactants must have sufficient ____. A) temperature B) enzyme C) energy D) catalyst

  16. C) energy

  17. A) To prevent mutations B) To form four identical daughter cells C) To mix the chromosomes so that crossing over can occur D) To help break down fructase 4A. Why are Tetrads formed during Metaphase 1 in Meiosis?

  18. Answer: C

  19. 4B. Which cells in the body go through Meiosis? • Sex Cells • Hemoglobins • Red & white blood cells • Heart cells

  20. Answer: A

  21. 5B. _____ are organic molecules, derived from water soluble vitamins that are needed for the function of particular enzymes. • A) cofactors • B) coenzymes • C)substrates • D) catalysts

  22. B) coenzymes

  23. Question 6A. What molecule enters the citric acid cycle during carbohydrate catabolism process? Pyruvic acid Citric Acid Acetyl Coenzyme Carbonic Acid

  24. Answer C) Acetyl Coenzyme

  25. Question 6B What is the 4th step in glycolysis? • 4 ATP made, 2 used • Pyruvic acid goes to citric acid cycle • NAD+ picks up 2H+ = NADH + H+ • NADH + H+ goes to ETS

  26. Answer • D) NADH + H+ goes to ETS

  27. Question 6C • During the electron transport system, how do the protons (H+) come back into the mitochondria matrix? A)Through the third pump B)By the diffusion through ATP synthase C)First pump D)Second pump

  28. Answer • B) By diffusion through ATP synthase

  29. 7A. With Resting Membrane Potential, the inner cell is of what charge? • Positive • Negative • Both positive and negative • No charge at all

  30. ANSWER: B

  31. 7B. Which takes more time? • Absolute Refractory Period • Relative Refractory Period • Menstrual Period Potential • Nuclear Refractory Period

  32. Answer: B

  33. 8A. Q: What increases the speed of an action potential conduction? Increased diameter of the axons Myelination A and B None of the above

  34. 8A. Q: What increases the speed of action potential conduction? C. A and B

  35. 8B. Q: Where are action potentials produced in myelinated axons? Postsynaptic axons Nodes of Ranvier Presynaptic axons Dendrites

  36. 8B. Q: Where are action potentials produced in myelinated axons? B. Nodes of Ranvier

  37. 9.A Lab 1.3 • _____________ is the maintenance of a constant internal environment within an organism.

  38. Homeostasis is the maintenance of a constant internal environment within an organism.

  39. 9B. • Homeostasis is maintained by the sensors that send information to the _____________ which detect deviations from the ____________. Then a signal is sent to the ____________ that counters the change the internal environment.

  40. Homeostasis is maintained by the sensors that send information to the integrating center which detect deviations from the set point. Then a signal is sent to the effectors which counters the change the internal environment.

  41. 9C. • Give an example of a negative feedback loop that occurs after you eat.

  42. After eating, a person’s blood glucose rises above normal levels. The pancreas then secretes the hormone insulin that increases the cellular uptake of glucose. This results in a decrease of the blood glucose levels to normal range.

  43. 10A. DNA lab 1. _______ replication produces two identical molecules containing a _____ and a ______.

  44. Answer Semiconservative Parent Strand Daughter Strand

  45. 10B. DNA lab ______ & ______ found that DNA is the hereditary material injected into the cell. The technique they used to follow DNA or proteins of the phage was with radioactive _____ & _____.

  46. Answer Hershey & Chase Phosphorus & Sulfur

  47. 10C. DNA lab The structure of DNA is a ________ containing 3 components known as a ___ , _________ , and a ____________.

  48. Answer Double-helix Base, Sugar (deoxyribose), Phosphate group

  49. 11A. Ex. 1.1 • If the diameter of the field of vision is equal to 178 um, what is it equivalent to in • a) nm • b) cm

  50. A) 178,000 nmB) 0.0178 cm

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