Answer:
a. QRS
Explanation:
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
Diastole : in this stage, the ventricles is relaxed and would be filled with blood.
Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
The right atrioventricular valve (AV) comprises of three (3) leaflets (flaps) which opens and closes in order to allow for the flow of blood from the right atrium of the human heart to the right ventricle. Also, the right atrioventricular valve is saddled with the responsibility of preventing blood from flowing backward in the mammalian heart.
The QRS complex represents the time necessary for the impulse to travel through the bundle of His, the bundle branches, and the Purkinje fibers to complete ventricular activation or contraction, known as ventricular depolarization. QRS is simply a combination of the Q-wave, R-wave and the S-wave which represents electrical impulses.
It is more effective than using an improvisation tactic against an opposing team
Asthma- A condition in which a person's airways become inflamed, narrow and swell, and produce extra mucus, which makes it difficult to breathe.
Asthma attack- Called an asthma exacerbation, the airways become swollen and inflamed. The muscles around the airways contract and the airways produce extra mucus, causing the breathing (bronchial) tubes to narrow.
During an attack, you may cough, wheeze and have trouble breathing. Symptoms of a minor asthma attack get better with prompt home treatment. A severe asthma attack that doesn't improve with home treatment can become a life-threatening emergency.
The aspects of our lives that help us to avoid self-destructive actions and peer pressure to engage in these actions are the right education, safe environment and psychological support.
The aspects that make it difficult to resist peer pressure to engage in destructive actions are lack of family support, search for social relevance among friends, etc.
<h3>How should parents and teachers help students who give in to peer pressure?</h3>
Dealing with peer pressure
- In adolescence, participation in a social group has enormous relevance.
- Saying “no” on time can keep your kids away from negative influences.
- Fostering self-esteem from an early age will help children to be part of a group and make appropriate choices.
With this information, we can conclude that the aspects of our lives that help us to avoid self-destructive actions and peer pressure to engage in these actions are the right education, safe environment and psychological support.
Learn more about self-destructive actions in brainly.com/question/12174739
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