ANATOMY

Detailed explanation-1: -Unlike skeletal muscle cells, cardiac muscle cells do not rely on calcium ions for contraction. Unlike skeletal muscle, cardiac muscle does not use a sliding filament mechanism for contraction. Unlike skeletal muscle cells, cardiac muscle cells can be autorhythmic.

Detailed explanation-2: -Cardiac muscle, like skeletal muscle, is made up of sarcomeres that allow for contractility. However, unlike skeletal muscle, cardiac muscle is under involuntary control. The cardiac muscle is responsible for the contractility of the heart and, therefore, the pumping action.

Detailed explanation-3: -Which of the following is a difference between cardiac muscle and skeletal muscle? Unlike skeletal muscle cells, cardiac muscle cells can be autorhythmic. Unlike skeletal muscle cells, cardiac muscle cells do not rely on an influx of calcium ions for depolarization.

Detailed explanation-4: -The heart displays autorhythmicity: a denervated heart (such as the heart of a cardiac transplant patient) continues to contract spontaneously. Pacemaker cells do not have a stable resting action potential, and it is the spontaneous depolarization of the pacemaker potential that gives the heart its auto-rhythmicity.

Detailed explanation-5: -Cardiac and most smooth muscles are autorhythmic-they are capable of contracting spontaneously without nervous or hormonal stimulation.