What is the CORRECT statement of how blood flows through the heart?
Blood flows from the body into the right atrium, to the left atrium, to the left ventricle, to the lungs, to the right ventricle, to all parts of the body.
Blood flows from the body into the right atrium, to the right ventricle, to the lungs, back the left atrium, to the left ventricle, to all parts of the body.
Blood flows from the body into the left atrium, to the left ventricle, to the lungs, back to the right atrium, to the right ventricle, to all parts of the body.
Blood flows from the body into the left atrium, to the right atrium, to the right ventricle, to the lungs, to the left ventricle, to all parts of the body
The Correct Answer is B
Option 2 accurately reflects the pathway of blood through the heart and the circulatory system:Top of FormBottom of Form
- Blood flows from the body into the right atrium: Deoxygenated blood from the body enters the right atrium via the superior and inferior vena cava.
- To the right ventricle: Blood flows from the right atrium into the right ventricle through the tricuspid valve.
- To the lungs: The right ventricle pumps the deoxygenated blood to the lungs via the pulmonary arteries.
- Back to the left atrium: Oxygenated blood returns from the lungs to the left atrium through the pulmonary veins.
- To the left ventricle: Blood flows from the left atrium into the left ventricle through the mitral valve.
- To all parts of the body: The left ventricle pumps oxygenated blood to the entire body through the aorta.
This sequence correctly follows the structure and function of the heart's chambers and valves, as well as the flow through the pulmonary and systemic circuits.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Stimulation of the parasympathetic nervous system generally results in a decrease in heart rate (bradycardia) and can also influence respiratory rate. A heart rate of 56 bpm is indicative of parasympathetic activation. While the respiratory rate of 20/min is within the normal range, parasympathetic stimulation primarily affects heart rate more significantly.
Correct Answer is D
Explanation
Asthma is a chronic respiratory condition that affects the airways, causing episodes of wheezing, breathlessness, chest tightness, and coughing. The underlying changes in the respiratory system due to asthma include inflammation, increased mucus production, and bronchoconstriction (narrowing of the airways). Here’s a detailed explanation of how asthma affects the respiratory system and leads to increased mucus production:
Detailed Explanation
Inflammation:
Asthma causes inflammation of the bronchial walls. The airways become swollen and sensitive, responding strongly to various triggers such as allergens, pollutants, cold air, or exercise.
- Bronchoconstriction:
The muscles around the bronchi (the large air passages leading from the trachea to the lungs) tighten, causing the airways to narrow. This constriction makes it difficult for air to flow in and out of the lungs.
Increased Mucus Production:
In response to the inflammation, the goblet cells and submucosal glands in the bronchial walls produce excess mucus. This mucus is thicker and stickier than normal, contributing to the obstruction of the airways. The buildup of mucus further narrows the airways and makes it harder to breathe.
Airway Remodeling:
Over time, chronic inflammation can lead to structural changes in the airways, known as airway remodeling. This includes thickening of the airway walls, increased smooth muscle mass, and more mucus-producing cells, which perpetuates the cycle of airway obstruction and difficulty breathing.
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