BILD 2 Fall 2010 Final KEY

BILD 2 Fall 2010 Final KEY - BILD 2, Multicellular Life...

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BILD 2, Multicellular Life Final Examination. ANSWER KEY Fall 2010 December 10, 2010 Page 1 SELECT THE SINGLE BEST ANSWER Ignorance and youth are curable conditions! 1. Homeostasis is the ability of the body to: a. Maintain the internal environment constant within a narrow range of variation b. Amplify changes in the internal environment c. Create a balance between the internal and external environments d. Prevent the external environment from changing e. Change the internal environment under different physiological conditions. 2. Which of the following parameters in mammals can vary over a wide range under different normal physiological conditions? a. Osmolarity and volume of the blood. b. Osmolarity and volume of the urine. c. The pH of arterial blood d. Body temperature e. The sodium and potassium concentrations of the extracellular fluid. 3. A complete feedback loop (positive or negative) requires: a. Sensor(s) b. Integrating Center c. Effector(s) d. All of the above e. None of the above 4. In a positive feedback loop, the effectors cause a change: a. That amplifies the effect of the original stimulus b. That decreases the effect of the original stimulus c. That adapts the body to the original stimulus d. That allows the body to respond positively to the original stimulus e. That improves the response to the original stimulus. 5. In a negative feedback loop, the effectors cause a change: a. That amplifies the effect of the original stimulus b. That decreases the effect of the original stimulus c. That adapts the body to the original stimulus d. That prevents the body from responding negatively to the original stimulus e. That inhibits the response to the original stimulus. 6. Which of the following is incorrect ? a. The flow of sodium during an action potential is an example of a positive feedback loop. b. The flow of potassium during an action potential is an example of a positive feedback loop. c. Thyroid hormone secretion is regulated by negative feedback loops. d. Homeostasis is mostly maintained by negative feedback loops. e. Contraceptive pill effects are based on negative feedback loops. 7. The tissue that forms glands and functions to separate compartments is: a. Nervous b. Muscle
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BILD 2, Multicellular Life Final Examination. ANSWER KEY Fall 2010 December 10, 2010 Page 2 SELECT THE SINGLE BEST ANSWER c. Epithelial d. Connective e. All of the above 8. Which of the following has the lowest intracellular concentration? a. Glucose b. K + c. Ca 2+ d. Na + e. ATP 9. Which of the following proteins directly uses ATP? a. Na + /Glucose transporter b. Voltage-gated K + channel c. Nicotinic Acetylcholine Receptor d. Na + /K + pump e. Aquaporins 10. CO 2 is mainly produced in the: a. Lysosomes b. Mitochondria c. Rough Endoplasmic Reticulum d. Nucleus e. Cytoplasm 11. Which of the following can diffuse through the lipid bilayer? A. Gases (O
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This note was uploaded on 03/09/2012 for the course BILD 2 taught by Professor Schroeder during the Fall '08 term at UCSD.

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BILD 2 Fall 2010 Final KEY - BILD 2, Multicellular Life...

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