Solved

The SA Node Is the Heart's Normal Pacemaker Because

Question 197

Multiple Choice

The SA node is the heart's normal pacemaker because


A) it has the fastest rate of autorhythmicity
B) it has both sympathetic and parasympathetic innervation
C) it lies in the right atrium
D) activation of K+ channels occurs more rapidly in this region than elsewhere in the heart
E) it can directly stimulate atrial and ventricular cardiac myocardial contractile cells

Correct Answer:

verifed

Verified

Unlock this answer now
Get Access to more Verified Answers free of charge

Related Questions

Q65: Match each ECG wave or complex with

Q192: Ventricular systole is displayed as the QRS

Q193: The cardiac muscle<br>A)extracts oxygen and nutrients from

Q194: Indicate which valve abnormality is being described

Q195: Use the following answer code to compare

Q196: Use the answer code below to complete

Q198: The heart utilizes glucose almost exclusively for

Q199: Indicate which ion is involved in each

Q200: Use the following answer code to compare

Q202: Oxygenated blood would pass through the mitral