At the battle of Shiloh in the American Civil War, Confederate General A. S. Johnston was killed when he was shot in the thigh. Witnesses reported that he bled to death almost before he realized that he was wounded. Which blood vessel was most likely to have been injured? Why is a tourniquet usually ineffective in stopping the bleeding from this wound?
What will be an ideal response?
The wound severed his femoral artery, the largest artery serving the lower limb. A tourniquet may be ineffective because it is a high-pressure, deep artery with a large diameter. It is therefore difficult to exert enough pressure through the thigh muscles to stop the bleeding.
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a. ileum b. duodenum c. cecum d. jejunum
If a neuron is prevented from sending a neurotransmitter across a synapse to another cell, which neuron property is being inhibited?
A) Conductivity B) Excitability C) Permeability D) Secretion
Nucleoli function in the production of ________.
Fill in the blank(s) with the appropriate word(s).
Ciliated cells lining the trachea are killed with continued exposure to cigarette smoke. Therefore, in a smoker, which of the following functions are impaired?
A. The ability of these cells to move mucus over the tracheal surface. B. The ability of these cells to transport oxygen. C. The ability of these cells to remove carbon dioxide. D. The ability of these cells to produce mucus.