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biology


Sent to Health Experts September 26, 2006 12:51 a.m.
1. The actual damage done at the site of an infarct is due to

   A. one or more blood clots.
    B. arterial plaque.
    C. myocardial angina.
    D. oxygen deprivation.
       
     
2. The cell most likely to be attacked by an HIV virus is a _______ cell.

   A. helper T
    B. cytoxic T
    C. suppressor T
    D. memory T
       
     
3. When you exercise vigorously, glycogen is broken down in muscle cells, providing energy to

   A. the entire body.
    B. the heart and muscle cells.
    C. the parts being exercised.
    D. muscle cells.
       
     
4. Which one of the following participates in the body's second line of defense?

   A. Tissue linings of the respiratory system
    B. Interferons
    C. Skin cells
    D. Saliva
       
     
5. During moderate exercise, a body gets most of its energy from

   A. carbohydrates.
    B. cellulose.
    C. glucose.
    D. triglycerides.
       
     
6. A renal tubule passes most of the fluids it processes into

   A. the urinary bladder.
    B. the bloodstream.
    C. a glomerulus.
    D. a ureter.
       
     
7. What does cholesterol do?

   A. It makes steroids.
    B. It provides crucial amino acids.
    C. It reduces the chances of developing atherosclerosis.
    D. It reduces dependency on saturated fats.
       
     
8. Suppose you're a physician treating an infant with respiratory distress syndrome. Your intervention to effect relief of the baby's symptoms will involve

   A. alveolar macrophages.
    B. an artificial surfactant.
    C. antibiotics.
    D. oxygen.
       
     
9. Ligaments join bones to

   A. muscles.
    B. bones.
    C. joints.
    D. cartilage.
       
     
10. An oxygen molecule is inhaled by a human. After hitching a ride on a red blood cell, its next stop will be the _______ of the heart.

   A. left ventricle
    B. left atrium
    C. right ventricle
    D. right atrium
       
     
11. Oxygenated red blood cells arrive at capillaries through

   A. arterioles.
    B. cell walls.
    C. venules.
    D. capillary walls.
       
     
12. Erythropoitein, which stimulates red blood cell production, is produced by the

   A. red bone marrow.
    B. pituitary gland.
    C. kidneys.
    D. adrenal glands.
       
     
13. What would probably happen if your liver stopped producing sufficient quantities of bile salts?

   A. You would develop gallstones.
    B. Your small intestine would have trouble breaking up fat globules.
    C. Your small intestine would have trouble neutralizing acid from your stomach.
    D. You would develop chronic heartburn.
       
     
14. During the inflammatory response, what causes arterioles in the damaged area to dilate?

   A. Interferon
    B. Macrophage action
    C. Histamine
    D. Swelling and heat
       
     
15. What do platelets and red blood cells have in common?

   A. Both are produced by large, multinucleated cells in red bone marrow.
    B. Both produce fibrin.
    C. Both are actually just tiny cell fragments.
    D. Neither has a nucleus.
       
     
16. The aorta serves as a superhighway for

   A. oxygenated blood being pumped from the right ventricle.
    B. deoxygenated blood on its way to the lungs from the right atrium.
    C. deoxygenated blood on its way to the body from the left atrium.
    D. oxygenated blood being pumped from the left ventricle.
       
     
17. Which one of the following statements is accurate for vitamins?

   A. When they're water-soluble, like vitamin A, they serve as antioxidants.
    B. They are recycled in the body to be used again and again.
    C. All of them are functional foods.
    D. They include minerals like calcium and potassium.
       
     
18. The sinoatrial node is located in the

   A. right ventricle.
    B. left ventricle.
    C. right atrium.
    D. left atrium.
       
     
19. In what part of the respiratory system does the exchange of oxygen and carbon dioxide occur?

   A. Larynx
    B. Trachea
    C. Lungs
    D. Pharynx
       
     
20. In rheumatic fever, damage to the heart valves is directly caused by

   A. an uncontrolled spread of streptococcus bacteria.
    B. protein antibodies produced to defend the body against streptococcus bacteria.
    C. the contest between streptococcus and antibodies that takes place in the body.
    D. a heart murmur due to weakness in the heart valves.

Customer (name blocked for privacy)
Status: Closed   Value: $9   
Reply
Sent September 27, 2006 2:36 a.m. (1 day and 1 hour later)
Relist: I still need help.
Customer (name blocked for privacy)
Answer
September 27, 2006 3:10 a.m. (34 minutes and 11 seconds later) 		ACCEPTED Check Mark
I will answer these in order:


  1. D
  2. B
  3. C
  4. B
  5. A
  6. A
  7. C
  8. D
  9. A
  10. A
  11. C
  12. B
  13. C
  14. A
  15. D
  16. D
  17. A
  18. C
  19. C
  20. A
If this answer helps please hit the accept button. Thank you.


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