Your friend ate some shellfish, and as a result, his face and hands become swollen and red. You recommend he take an antihistamine. This may be effective in alleviating his symptoms because ________.
A. the medication will relax the bronchial smooth muscles, allowing him to breathe more freely
B. the medication should increase the vascular permeability of the irritated tissue, allowing immune cells to enter the tissue
C. the medication will help to prevent the escape of fluid and plasma proteins into the extracellular space
D. the medication should cause vasodilation to the tissues, allowing cells of the immune system to remove the foreign antigens
Answer: C
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What is the shape of a muscle cell or fiber?
a. short and cylindrical b. short and flat c. bulbous and segmented d. long and cylindrical e. long and flat
The compression (weight-bearing) strength of bone matrix is due to the presence of ________.
A. hydroxyapatite crystals B. collagenase C. elastin fibers D. collagen fibers E. bone marrow
Hypertension is commonly considered to be a chronic resting blood pressure higher than ________.
A. 130/60 B. 140/90 C. 200/90 D. 180/90 E. 120/75
Plasma is a yellowish fluid
Indicate whether the statement is true or false.