Answer:
yes its true
Explanation:
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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.
<span>The statement is TRUE.
Over the counter drugs do not need the doctor’s prescriptions as they are
effective and safe when the dosage on the label is strictly followed. However,
there are some drugs that can cause allergies to other people so it is best to
ask for doctor’s advice when dealing with unknown or unfamiliar medicines even
if they are not prescription drugs. It is important and mandatory to also read
the instructions that come with the medicines as they have allergen
information. </span>
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