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.
Answer: Complex concepts
Explanation:
The adolescent from the beginning from this stage until its completion and entry into adulthood goes through a process not only of physical growth but also of emotional and cognitive growth.
When a child is in early adolescence begins what is its critical thinking. This focuses on making personal decisions at home and school, questions the authority and standards of society, uses logic to solve operations at school and begins to express their thoughts and points of view on various topics.
When the child is in middle adolescence, it already has experience using critical thinking, its questions are more extensive as well as the analyses it performs, it begins to develop its own identity, thinks long term and begins to influence its relationships with others.
Already in the late adolescence stage, the child can use complex thinking for decision making, his thoughts grow related to topics such as justice, history, politics, and patriotism, offers views on specific issues or concerns that may Having a specific field, his thinking focuses on deciding on a career and begins to think about its role as an adult in society.
B, it influences one’s attitude and behavior.
<em> I think that the answer is poverty</em>
Answer:
<em>B. Many of these substances, when eaten, cause serious health problems over time.</em>
Explanation:
Electronic wastes are unwanted electrical or electronic material that has been thrown out by the user to be managed by waste managers. Mismanagement of electronic wastes can lead to a serious threat from the heavy metal deposit, this can affect the environment and humans.
During recycling, some of the heavy metal such as lead, cadmium, and Mercury is released to surrounding water bodies also direct disposal of such waste can result to increase of such metals.
As a large amount of heavy metal enters the river, it gets accumulated in the tissues of fishes overtime. Long term consumption of fishes that are affected by heavy metal poisoning can lead to some health-threatening issues such as;
<em>Therefore when fishes are affected by lead poisoning they affect human when eaten over time.</em>
