The electrolyte that is most important for maintaining the resting potential of nerve and cardiac muscle cells is:
A. calcium
B. sodium
C. chloride
D. potassium
d
Rationale: Potassium is the electrolyte especially important in maintaining the resting potential of nerve and cardiac mus-cle cells. Abnormal potassium levels may cause these cells to function abnormally.
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Answer the following statement(s) true (T) or false (F)
1. An open-hours scheduling system does not require the use of an appointment book. 2. Wave scheduling allows more flexibility than modified-wave scheduling. 3. Ask patients returning to the reception area if they need to schedule another appointment. 4. The correct abbreviation for nausea and vomiting is N & V. 5. Time-specified appointment scheduling is the most commonly used scheduling method in a medical office.
The ____, a blood vessel that connects the pulmonary trunk to the aorta below the aortic arch, prevents deoxygenated blood from flowing to the brain.
A. IVC B. umbilical artery C. portal sinus D. ductus arteriosus
Type 1 diabetes is sometimes called late onset diabetes
Indicate whether the statement is true or false
Any combination of sedatives and hypnotics can be lethal; this is known as which of the following?
A. Tolerance B. Progression C. Additive effect D. Toxicity