List two characteristics of the paranasal sinuses.
What will be an ideal response?
Answer:
1. they are open to the nasal cavity.
2. they are lined with mucous membrane
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A lay term for the larynx is the ____________________.
Fill in the blank(s) with the appropriate word(s).
Autoantibodies are
A) produced by activated T cells. B) produced during an allergic reaction. C) directed against the body's own antigens. D) the first step in immunological competence. E) important in tissue rejection reactions.
Rods
a. are more sensitive to light than cones. b. have low acuity. c. provide vision in shades of gray. d. have both low acuity and provide vision in shades of gray. e. all of these answers.
Which of the following lymphoid tissues removes defective red blood cells from the blood?
A. Lymph node B. Thymus C. Spleen D. Peyer's patches