A band of mesentery, the ________, connects the appendix to the cecum.
What will be an ideal response?
mesoappendix
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__________ may activate B cells, whereas __________ inhibit the activity of B cells.
a. macrophages; microphages b. memory cells; plasma cells c. helper T cells; suppressor T cells d. memory cells; cytotoxic cells
Which two factors below make rapid and substantial blood loss life threatening?
A) loss of immunity and loss of blood pressure B) loss of immunity and loss of carbon dioxide carrying capacity C) loss of clotting ability and loss of osmotic pressure D) loss of blood pressure and loss of oxygen carrying capacity
The epithelial linings of the respiratory and digestive systems develop from the
A. lumenoderm. B. ectoderm. C. endoderm. D. mesoderm.
The nervous system avoids muscle fatigue during submaximal contraction by
A) asynchronous recruitment. B) synchronous recruitment. C) always recruiting slow-twitch motor units. D) always recruiting fast-twitch motor units.