An important role of saliva is that it
a. washes away bacteria.
b. provides the body's main source of potassium.
c. contains hydrochloric acid for breakdown of protein.
d. stimulates the sympathetic nervous system.
A
Salivation has an important role in the first stage of digestion because it lubricates the mouth, facilitates the movement of the lips and the tongue during swallowing, and washes away bacteria. Saliva consists of approximately 99.5% water that contains a large amount of ions such as potassium, chloride, bicarbonate, thiocyanate, and hydrogen, as well as immunoglobulin A, which is vital for destroying oral bacteria and mucus.
You might also like to view...
Values clarification can assist the client to clarify his or her own values to facilitate effective decision making. Which of the following nursing activities is incorporated into this intervention?
a. Avoid the use of open-ended questions. b. Use multiple sessions to cross-examine the client to ensure he or she is clear about personal values. c. Use appropriate questions to assist the client in reflecting on the situation and what is personally important. d. Encourage members of the health care team to relate how they would make the decision.
In which situation is a dilation and curettage (D&C) indicated?
a. Complete abortion at 8 weeks b. Incomplete abortion at 16 weeks c. Threatened abortion at 6 weeks d. Incomplete abortion at 10 weeks
The nurse checks on a patient who has received sumatriptan (Imitrex) for treatment of a migraine headache. The patient reports moderate improvement in headache pain and reports feeling dizzy
The nurse notes a blood pressure of 160/85 mm Hg. Which action by the nurse is correct? a. Notify the provider of the dizziness. b. Notify the provider of the increased blood pressure. c. Plan to administer a second dose in 1 hour. d. Request an order for intranasal sumatriptan.
A nurse is assisting a patient to shave his beard. Which of the following statements accurately describes a recommended step in this process?
A) Cover the patient with a blanket. B) Fill a basin with cool water. C) Apply cream to area to be shaved in a layer about ½-inch thick. D) Shave against the direction of hair growth in upward, short strokes