Describe the process of firing threshold and impulse generation
What will be an ideal response?
When a nerve is stimulated, the ion channels respond by releasing the gatekeeper calcium ions. The channels are then wide enough to allow the positively charged, hydrated Na+ ions to begin to enter through the channels into the more negatively charged axoplasm. The initial influx of positively charged Na+ ions causes a slow depolarization. Once there are sufficient Na+ ions in the axoplasm to reduce the electrical potential by approximately 15 to 20 mV, extracellular Na+ ions flood the axoplasm.
You might also like to view...
When using a wetting agent with a powder while compounding a medicated cream, it is necessary to:
A) Use a vanishing cream base. B) Avoid using a commercially prepared cream such as Eucerin. C) Use absorption enhancers that "push" the medication through the layers of skin into the bloodstream. D) Calculate the volume required into the formula.
A listless and lethargic 84-year-old male patient responds to physical stimuli with garbled speech. His respirations show poor effort and are rapid and labored, with a room-air SpO2 of 84%. Additionally, you cannot appreciate breath sounds in his right lung. The best form of oxygen therapy for this patient would be:
A) Positive pressure ventilation B) High-concentration oxygen via a nonrebreather mask C) Oxygen at 2 lpm via nasal cannula initially and increase the liter flow as needed D) Continuous positive airway pressure (CPAP)
The instructional note found at the code for Pain, NOT elsewhere classifiable, states which of the following?
A) Code only neoplasm-associated pain B) Code first underlying disease C) Code any related psychological factors associated with pain D) Code first T36-T50 to identify rug
Which of the following is NOT a category of human resource components in mental health care?
A) Specialty mental health sector B) Home health sector C) General medical/primary care sector D) Human services sector