A delayed response such as contact dermatitis is an example of what type of hypersensitivity reaction?
A) Type I
B) Type II
C) Type III
D) Type IV
Answer: D) Type IV
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Which structure prevents food or water from entering the trachea?
a) Arytenoid cartilage b) Epiglottis c) Nasopharynx d) Thyroid cartilage e) Paranasal sinus
Which is characteristic of cardiac muscle tissue?
a. well developed sarcoplasmic reticulum. b. fast myosin ATPase activity. c. contraction is initiated neurogenically. d. presence of gap junctions. e. calcium supplied by sarcoplasmic reticulum exclusively.
A hormone called ________ is produced by the thyroid gland and stimulates osteoblast activity.
Fill in the blank(s) with the appropriate word(s).
Which is TRUE regarding the immune system cells?
A. Plasma cells are derived from T cells. B. Macrophages are derived from basophils. C. Macrophages are derived from monocytes. D. The immune cells found within the bloodstream are called erythrocytes. E. Neutrophils are classified as lymphoid cells.