Mucus is moved along the lining of the trachea by extensions from cell membranes known as
A. cilia.
B. flagella.
C. microvilli.
D. stereovilli.
A
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An increase in heart rate is accompanied by
a. an increase in L-type Ca2+ channel activity. b. an increase in K+ flux through voltage-gated K+ channels. c. an increase in the passive movement of Na+ into cells of the SA node. d. an increase in the passive movement of K+ out of cells of the SA node. e. a combined increase in passive movement of Na+ and K+ out of the cells of the SA node.
Which tastes are most concentrated on the lateral sides of the tongue?
A. Salty and sour B. Bitter and umami C. Sour and sweet D. Sweet and salty
The QRS wave on an electrocardiogram is representative of ventricular repolarization
Indicate whether the statement is true or false
The portal vein is seen in formation
A. superior to the pancreas. B. posterior to the pancreas. C. anterior to the pancreas. D. inferior to the pancreas.