Cells that line the respiratory tract are covered with ____ on their free edge that move the mucus-dust package upward away from the lungs
a. cristae
b. cilia
c. cisternae
d. flagella
b
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Which of the following is true about hemoglobin?
A. appears red in color when depleted of O2 B. binds O2 210x more strongly than it binds carbon monoxide C. content tends to be higher in the blood of young women than young men D. erythropoietin inhibits synthesis E. heme centers reversibly bind O2
Which of the following lies between the cerebrum and the brain stem?
A) medulla oblongata B) pons C) mesencephalon D) diencephalon E) cerebellum
the beta cells in the pancreas secrete
What will be an ideal response?
The type of breathing in which the thoracic volume changes because the rib cage changes shape, and inhalation occurs when contraction of the external intercostals elevates the ribs and enlarges the thoracic cavity, is called ________.
Fill in the blank(s) with the appropriate word(s).