Answer the following statements true (T) or false (F)
1. The terms innate immunity and nonspecific immunity refer to the same thing.
2. The main difference between active and passive immunity is where the immunity develops.
3. A main difference between natural and artificial immunity is how the body was exposed to the harmful agent.
4. The combining sites on an antibody are only exposed when it is attached to an antigen.
5. Adults can produce B lymphocytes in both the liver and red bone marrow.
1. TRUE
2. TRUE
3. TRUE
4. FALSE
5. FALSE
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What happened to the urine concentration when the solute gradient in the interstitial space was increased?
A) The urine concentration went to zero. B) The urine concentration stayed the same. C) The urine concentration decreased. D) The urine concentration increased.
What is the significance of the "C-shaped" cartilages that reinforce the tracheal rings?
A) The incomplete portion of the C-shaped cartilages are located at the posterior of the tracheal cartilages, to permit the esophagus to bulge anteriorly into the tracheal lumen in transient fashion to permit a large bolus to pass. B) The open region permits passage of the nerves that stimulate the muscles of the laryngeal region. C) They form a solid cartilaginous tube. D) These cartilages hold the trachea rigidly open at the same diameter at all times. E) None of the answers are correct.
Which of the following statements regarding blood capillaries and lymphatic capillaries is not true?
A. Endothelial cells of both blood and lymphatic capillaries are joined by tight junctions. B. Bacteria and lymphocytes may move into lymphatic capillaries through gaps between cells. C. Lymphatic capillaries are closed at one end, unlike blood capillaries. D. Both lymphatic and blood capillaries are lined with endothelium. E. Both lymphatic and blood capillaries reabsorb fluid from tissue spaces.
Hamsters reach maturity at _________ ___________ of age
Fill in the blank(s) with correct word