What role do outer hair cells play in the transmission of sound?
A. They dampen strong vibrations from very loud sounds.
B. They amplify softer sound and sharpen pitch perception.
C. They bend and depolarize with specific wavelengths of sound waves.
D. All of the choices are correct.
Answer: B
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The olecranon fossa
A. forms the elbow joint. B. accommodates the proximal ulna. C. is a depression on the posterior distal humerus. D. All of the above
Ions with a negative charge are called ________.
Fill in the blank(s) with the appropriate word(s).
What type of cells secrete the matrix of bone?
A. Osteoprogenitor cells B. Osteoclasts C. Osteocytes D. Osteoblasts
Plasma cells have a life span of about ________, which is mainly spent in the ________.
A. 130 days; lymph nodes B. 5 days; blood C. 130 days; blood D. 5 days; lymph nodes