When firms price discriminate they turn ________ into ________
A) producer surplus; revenue
B) consumer surplus; profit
C) total cost; profit
D) producer surplus; consumer surplus
B
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Although the heart beats without nervous innervation, ________ can modify the heart rate
A) hormones B) various chemicals and ions C) impulses from the autonomic nerves D) impulses from the autonomic nerves, hormones, and various chemicals and ions
A scientist who describes the layers of the heart wall and their relationship to the surrounding pericardium would be a(n)
A. pathologist. B. anatomist. C. physiologist. D. pulmonologist.
Hemolytic disease of the newborn may result if
A) the mother is Rh positive and the father is Rh negative. B) both the father and the mother are Rh negative. C) both the father and the mother are Rh positive. D) an Rh-negative mother carries an Rh-positive fetus. E) an Rh-positive mother carries an Rh-negative fetus.
Most of the middle layer in the heart wall is composed of
A) cardiac muscle cells. B) chondrocytes. C) epithelial cells. D) fibrocytes. E) smooth muscle cells.