How do hormones and target cells recognize one another?
A. by signs
B. by the location of the target cells
C. by the presence of specific receptor molecules on the target cells
D. by the function of the target cells
E. by the location of the hormones
C
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Another term for a synovial joint is ____________________.
Fill in the blank(s) with the appropriate word(s).
The neurotransmitter that is released at neuromuscular junctions and that stimulates skeletal muscle to contract is ______.
A. glutamate B. acetylcholine C. norepinephrine D. GABA
How does the heart muscle extract O2 or nutrients from the blood?
a. via the coronary circulation b. absorption through the ventricles c. absorption through the atria d. via the vena cava e. via the pulmonary artery
Which of the following is not true of the structure of a lymph node?
A. A lymph node typically has one afferent lymphatic vessel and several efferent lymphatic vessels. B. Trabeculae are inward extensions of the capsule, that provide physical support. C. Lymphatic nodules are all located in the cortex of the node. D. The hilum is the entry/exit point for blood vessels and (a) certain lymphatic vessel(s). E. All of these are true of the structure of a lymph node.