Which of the following ion exchanges occur in the distal convoluted tubule?
A. Na+ for H+ and Na+ for Cl-
B. Na+ for H+ and Na+ for HCO3-
C. Na+ for H+ and Na+ for K+
D. Na+ for Ca+ and Na+ for K+
Answer: C
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Assessment of a patient's leg reveals the presence of a 1.5-cm circular region of necrotic tissue that is deeper than the epidermis. The nurse should document the presence of what type of skin lesion?
A) Keloid B) Ulcer C) Fissure D) Erosion
Sample attrition would be reflected by the:
a. average death rate of the population under study. b. inability to access identified members of a population. c. number of patients who die while participating in a study. d. number of patients who drop out of a study.
An important self-care measure the nurse teaches a client who has sickle cell disease is to
a. avoid crowds and people who are sick. b. eat a well-balanced diet with plenty of fiber. c. get plenty of vigorous exercise daily. d. have genetic testing done if contemplating children.
A patient expresses concerns over having black stool. The fecal occult test is negative. Which response by the nurse is most appropriate?
a. "This is probably a false negative; we should rerun the test." b. "Do you take iron supplements?" c. "You should schedule a colonoscopy as soon as possible." d. "Sometimes severe stress can alter stool color."