Which statement is correct about an osteon?
a. The circumferential lamellae surround the blood vessels and nerves within an osteon.
b. Canaliculi allow for nutrient and waste exchange among the osteocytes.
c. The middle region of an osteon is called the perforating canal.
d. They are oriented perpendicular to the diaphysis of a long bone.
b. Canaliculi allow for nutrient and waste exchange among the osteocytes.
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In a patient with pneumonia, fluid and ________ accumulate in the lung alveoli.
A. leukocytes B. mast cells C. septal cells D. chyme E. erythrocytes
The superior vena cava carries:
a. oxygen-rich blood to the right atrium b. oxygen-poor blood to the left atrium c. oxygen-rich blood to the left atrium d. oxygen-poor blood to the right atrium
Which of the following usually accounts for the smallest percentage of leukocytes in a
blood sample? A) Eosinophils B) Basophils C) Monocytes D) Neutrophils
Dehydration synthesis reactions _____, whereas hydrolysis reactions _____
A) lose H2O to form bonds; use H2O to break bonds B) lose H2O to break bonds; use H2O to form bonds C) break large molecules into smaller ones; build large molecules from smaller ones D) use H2O to form bonds; lose H2O to break bonds