What makes cartilage an unusual connective tissue?
A) Types of cartilage are named for their primary locations in the body.
B) Cartilage lacks collagen fibers.
C) Cartilage lacks an extracellular matrix (ECM) and ground substance.
D) Cartilage essentially lacks blood vessels coursing through the cartilage.
Answer: D
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The placenta allows
A. carbon dioxide and other wastes to diffuse from the maternal blood to the embryonic blood. B. oxygen and nutrients to diffuse from maternal blood to the embryo. C. maternal blood to mix with fetal blood. D. the fetus to enlarge without rupturing the mother's abdomen.
If the right sternocleidomastoid contracts unilaterally, the resulting movement will be
A. lateral flexion of the head to the right and rotation of the head to the left. B. lateral flexion of the head to the left and rotation of the head to the right. C. lateral extension of the head to the right and rotation of the head to the left. D. lateral extension of the head to the left and rotation of the head to the right.
Which three components make up the porta hepatis
A) hepatic portal vein, hepatic artery proper, common bile duct B) central vein, hepatic vein, common bile duct C) hepatic portal vein, hepatic artery proper, hepatic vein D) hepatic artery proper, central vein, common bile duct E) hepatic portal vein, central vein, hepatic artery proper
The gastric enzyme ________ is secreted in inactive form and activated by the low pH of gastric juice.
A. rennin B. trypsin C. intrinsic factor D. pepsin