Answer:
The answer is A. Bilateral symmetry involves the division of the animal through a sagittal plane, resulting in two mirror-image, right and left halves, such as those of a butterfly, and a human body
Explanation:
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The correct compressions-to-ventilations ratio during a 1-person rescue on an adult is 30 compressions to 2 breaths (30/2).
<h3>What is the ratio of compression to ventilation for a 1 person rescue?</h3>
- Prior to the American Heart Association changing the criteria owing to studies, compression depth and rate for people of different ages were not the same.
- According to research, one or two-person CPR requires the same or a minor adjustment.
- The compression ratio for a single rescuer conducting CPR on an adult, child, newborn, or neonate is 30/2. The changes are minute, but they necessitate prompt response.
- Two breaths are administered for every 30 compressions. However, healthcare personnel must use a pocket mask or breathing equipment.
- The AHA does not need laypeople to take breaths, but it does require that chest compressions at 100 to 120 compressions per minute begin immediately.
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Answer: D. Contractility of the heart muscle refers to the force of contraction that this muscle can exert.
Explanation:
The myocardial contractility is ability of the heart muscles to contract. This is achieved by the forces which develop between the contracting muscles caused by the filaments of actin and myosin.
The degree of binding of the muscle filaments dependents upon the calcium ion concentration. These actions are controlled in vivo by the sympathetic nervous system. It is driven by the release of the catecholamine, which is a process which determines the calcium ion concentration inside the cytosol of the muscles of the heart.
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Comes in through superior and inferior vena cava, then enters right atrium, then tricuspid valve and into the right ventricle. Then the deoxygenated blood gets pumped through the pulmonary artery to the lungs. Oxygenated blood comes back through pulmonary vein and into left atrium. Then goes through mitral valve and into left ventricle which then pumps the blood through aorta.
