Bio20B_Summer2007_Midterm_FormB

Bio20B_Summer2007_Midterm_FormB - Dr. Michael Weise Biology...

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Dr. Michael Weise Biology 20B – Summer 2007 UCSC 1 Structure and Function of Plants & Animals Midterm Examination Exam Form B Name_________________________________ THIS IS EXAM FORM B . Be sure to write " B " on top of your ScanTron so we know which answer key to use. Also, mark your answer on BOTH this paper copy AND on the Scantron form. You will need to turn in BOTH. Only the ScanTron forms will be returned. Be sure that the bubbles on your Scantron form are filled completely and carefully, and that all erasures are complete. If you have questions or need interpretation of a question, please ask us. Good Luck!! Use the figure at right to answer questions 1 through 4. 1. If tissue level Po 2 is 20 mm Hg, what is the % O 2 saturation of hemoglobin? a. About 65% b. About 10% c. About 35% d. About 70% e. About 80% 2. If 80% of hemoglobin is saturated with oxygen, what is the approximate level of oxygen in the tissues? a. 90 mm Hg b. 50 mm Hg c. 100 mm Hg d. 10 mm Hg e. 0 mm Hg 3. When pH levels in the blood increase, the relationship illustrated by this graph shifts in which direction to decrease tissue level oxygen? a. Upwards b. To the left c. To the right d. There is no change 4. When carbon dioxide diffuses out of the tissues and into the blood, the relationship illustrated by this graph causes a Bohr shift in which direction? a. Upwards b. There is no change c. To the right d. To the left e. Downwards Use the diagram at right to answer questions 5 and 6 5. Name the structure denoted by the letter “A” a. Vena Cava b. L e f t V e n
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Dr. Michael Weise Biology 20B – Summer 2007 UCSC 2 6. When blood returns from the lungs back to the heart, where does it enter the heart? a. A b. B c. C d. D left e. E 7. The Atrio-ventricular node is the pacemaker of the heart? a. True b. False 8. Arterial walls are more muscular than veins but veins have valves whereas arteries do not. a. True b. False 9. Diastolic pressure is measured when the heart is contracting whereas Systolic pressure is measured between heart beats. a. True b. False 10. Steroid hormones target receptor sites inside cells a. True b. False 11. Secondary sexual characteristics in human females are influenced primarily by a. Cortisol b. Norepinephrine c. Estradiol d. Testosterone 12. What do vesicles in the synapses of a neuron contain? a. Potassium b. Sodium c. Neurotransmitters d. Calcium 13. What specifically triggers ligand-gated channels in the post-synaptic neuron to open? a. A change in voltage b. Sodium Ion c. Neurotransmitters d. Calcium Ion 14. The speed of electrical transmission down an axon in the PNS can be enhanced by Saltatory Conduction, which results from _____________________? a.
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This test prep was uploaded on 04/15/2008 for the course BIO 20b taught by Professor Dunkin&parker during the Summer '08 term at University of California, Santa Cruz.

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Bio20B_Summer2007_Midterm_FormB - Dr. Michael Weise Biology...

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