In a normal heart, which of the following structures is responsible for setting the heart's pace?
A. Sinoatrial node
B. Atrioventricular node
C. Atrioventricular bundle
D. Purkinje fibers
Answer: A. Sinoatrial node
Anatomy & Physiology
You might also like to view...
The right and left iliac (inguinal) regions are lateral to the ________ region
A) hypogastric (pubic) B) right hypochondriac C) right lumbar D) left hypochondriac
Anatomy & Physiology
The opposite of cranial is ________
Fill in the blank(s) with correct word
Anatomy & Physiology
Which of the following is characteristic of cardiac muscle tissue?
A) cells have many, irregularly shaped nuclei B) is the only nonstriated muscle tissue C) contracts only with nervous stimulation D) composed of small cells with branching ends E) can replace cells and regenerate after an injury
Anatomy & Physiology
Of the following choices, the pH of the least acidic solution is
A) 6.0. B) 4.5. C) 2.3. D) 1.0. E) 12.0.
Anatomy & Physiology