What type of tissue stimulates muscle to contract?

During two-rescuer CPR, the compressor and ventilator switch positions. While rescuer one is finishing his or her cycle of 30 compressions, rescuer two should:

A. assess for a carotid pulse for 15 seconds. B. move to the opposite side of the patient's chest. C. give two breaths and prepare to start compressions. D. suction the patient's mouth and give two more ventilations.

After guided bone regeneration, how long before implants are placed in that area?

A) 1 week B) 2 months C) 4 months D) 6 months