Which feature(s) of the dermis ensure(s) that it remains interlocked with the epidermis?
A. The dermal papillae
B. The areolar connective tissue
C. The collagen fibers in the reticular layer
D. Tension lines
E. Adipocytes
A. The dermal papillae
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If the total pressure of a gas is 700 mm Hg and its composition is 20% oxygen, 0.03% carbon dioxide, 75% nitrogen, and 5% water vapor, the partial pressure of oxygen (PO2) is
A) 15 mm Hg. B) 20 mm Hg. C) 105 mm Hg. D) 140 mm Hg. E) 1600 mm Hg.
When a person is chewing food, the concentration of ions in saliva changes with:
A. a decrease in Na+, Cl-, and HCO3- B. a decrease in Na+, Cl-, and an increase in HCO3- C. a decrease in K+ and Na+ D. an increase in Na+, Cl-, and HCO3- E. a decrease in K+ and HCO3-
The occipital lobes of the cerebrum are first seen on axial images at the level of the ____________________.
Fill in the blank(s) with the appropriate word(s).
Which of the following leads to inflammation, enhancement of phagocytosis and lysis of microbes?
a) Classical complement system b) Alternative complement system c) Apoptosis d) Classical and Alternative complement systems e) Hapten activation