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.
The preventive measures for drug addiction are:
- attractive advertisements should be banned
- avoid bad circle and peer group
- rehabilitation centres must be established
I think it's B, because recycling reduces mining and drilling, both of which cause air and water pollution. Hope this made sense lol it's the closest one to the the true answer
CORRECT
Ankle twist, cramps, knee injuries, etc
Answer:
Part of mental heath is how well your mind processes and understands information and experiences. In contrast, emotional health involves your ability to manage and express the emotions that arise from what you've got learned and experienced.
Explanation:
