Continual lymphocyte circulation is needed because
A. antigen is usually present in large amounts.
B. lymphocytes have a small chance or recognizing a particular antigen.
C. the chance of a naïve cell encountering its target antigen is moderately high.
D. there are relatively few antigen presenting cells in the lymph nodes compared to lymphocytes.
E. All of the above.
B
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_____ is an intense fear and anxiety of any place or situation where escape might be difficult
Fill in the blank with the right word.
Full-time college students ages 18 to 22 are
a. more likely than their peers to use alcohol. b. less likely than their peers to use alcohol. c. as likely as part-time students to use alcohol. d. more likely than graduate students to use alcohol.
The combining form that means mediastinum is ____________________
Fill in the blank(s) with correct word
The term ____ means vomiting blood
A) melena? B) ?hematemesis C) ?hyperemesis D) ?hemopoietic