Which is more efficient in propelling intestinal contents along the digestive tract: peristalsis or segmentation? Why?
A) segmentation; because it involves pushing the bolus forward
B) segmentation; because it involves mixing and churning
C) peristalsis; because it involves pushing the bolus forward
D) peristalsis; because it involves mixing and churning
E) both segmentation and peristalsis are equally effective at propelling intestinal contents along the digestive tract
Answer: C
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The anterior ramus of a typical spinal nerve innervates the
A. special senses. B. deep muscles of the back and the skin of the back. C. major thoracic and abdominal organs. D. anterior and lateral trunk and the limbs. E. abdominal wall.
The two types of cells that make up the nervous system are
A. macrophages and mast cells. B. neurons and chondrocytes. C. mast cells and fibrocytes. D. neurons and mast cells. E. neurons and glial cells.
Structure G
A) releases milk.
B) releases oil.
C) releases sweat.
D) is a sensory receptor.
E) releases mucus.
The antibody that becomes bound to mast cells and basophils and causes the cells to release histamine and other chemicals is ________.
Fill in the blank(s) with the appropriate word(s).