All of the following are features of the auricle EXCEPT the
A. Tragus
B. Helix
C. Lobule
D. Ala
E. Antitragus
Ans: D. Ala
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The outermost covering of the spinal cord is the endosteal layer of the dura mater.
Answer the following statement true (T) or false (F)
To maintain a resting membrane potential, the sodium-potassium pump
A. actively transports 3 sodium ions out of the cell and 2 potassium ions into the cell. B. passively transports 3 sodium ions out of the cell and 2 potassium ions into the cell. C. actively transports 3 potassium ions out of the cell and 2 sodium ions into the cell. D. passively transports 3 potassium ions out of the cell and 2 sodium ions into the cell.
Which is the neurotransmitter that causes the release of calcium ions from reservoirs within the muscle cell and thereby initiates the steps of contraction?
A. Acetylcholinesterase B. Acetylcholine C. Serotonin D. Norepinephrine
The structures near the end of the GI tract that help to separate gas from liquid are called:
a. sigmoid flexure b. anal sphincters c. anal columns d. rectal valves