What is the action of anti-phosphodiesterase drugs in erectile dysfunction?
What will be an ideal response?
These drugs inhibit the action of the phosphodiesterase enzyme that normally breaks down cGMP that is responsible for smooth muscle relaxation in the penile arteries and the trabeculae within the corpora cavernosa. By inhibiting the phosphodiesterase enzyme, the vasodilator action of cGMP is sustained, resulting in an increased blood flow to the penis (sildenafil (Viagra), vardenafil, tadenafil).
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An examiner is using an ophthalmoscope to examine a patient's eyes. The patient has astigmatism and is nearsighted. The use of which of these techniques would indicate that the examination is being correctly performed?
a. Using the large full circle of light when assessing pupils that are not dilated b. Rotating the lens selector dial to the black numbers to compensate for astigmatism c. Using the grid on the lens aperture dial to visualize the external structures of the eye d. Rotating the lens selector dial to bring the object into focus
Psychiatric rehabilitation focuses on: (Select all that apply.)
a. Helping clients control their behaviors b. Assisting clients to cope effectively with their life situations c. Helping clients identify their feelings d. Preventing the client from harming himself or herself e. Assisting the client with problem-solving techniques f. Assisting with occupational and vocational training
Biophysiologic measures may be used as either independent variables or dependent variables in a study
A) True B) False
One major function of the liver is to:
a. secrete pepsin. b. emulsify fats. c. store glycogen. d. absorb bile.