The SA Node is the heart's normal pacemaker. When the SA Node depolarizes, electrical signal spreads through the atrial muscle causing contraction.
Explanation:
Inherent rhythmicity / automaticity - The property of the pacemaker cells of the heart to start electrical sequence of depolarization and repolarization.
SA Node or Sino-atrial Node generates the electrical signal.
The electrical signal passes through internodal pathways, atrial fibres, atrioventricular node (AV Node), the bundle of His, Purkinje fibres, right bundle branch, left bundle branch.
Systole - Contraction of cells when the electrical signal of depolarization reaches the contractile cells.
Diastole - Relaxation of cells when the electrical signal of repolarization reaches the myocardial cells.
I believe the answer is B.
Unlike the micronutrients, the macronutrients<span> (proteins, fats and carbohydrates) </span>all<span>contribute to dietary </span>energy intake. Alcohol can ... Various expert groups have made consensusrecommendations<span> for </span>consumption<span> of ALA and/or the very long chain omega-3s, </span>based<span> on estimates of dietary </span>requirement<span>.</span>
Answer:because typically you aren’t filling out a 401k in middle school. These are things you learn in personal finance in high school
Explanation:
