Which of the following correctly describes the relative refractory period?
A) It is the period in which only a strong impulse can cause another depolarization.
B) It is the period in which the heart function stops temporarily to allow impulse transmission to occur.
C) It is the period in which no impulses at all can cause another depolarization.
D) It is the period in which even a weak impulse can cause another depolarization.
A
You might also like to view...
Which of the following are good candidates for home mechanical ventilation?
1. A patient who cannot maintain adequate ventilation at night 2. A patient who requires continuous ventilation to survive 3. A terminally ill patient who requires ventilatory support a. 2 and 3 only b. 1 and 2 only c. 1, 2, and 3 d. 1 and 3 only
In addition to a ventilator, which of the following equipment or supplies would you recommend for a home care patient receiving long-term invasive positive pressure ventilation?
1. Self-inflating bag-valve-mask 2. Portable suction system 3. Portable DC defibrillator 4. Tracheal tubes and care kits 5. Disposable circuits and catheters a. 2, 3, 4, and 5 only b. 1, 3, and 4 only c. 1, 2, 4, and 5 only d. 1, 2, 3, 4, and 5