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DHA EMT-B (DHA-EMTB) Practice Tests & Test Prep - Review


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DHA Emergency Medical Technician - Basic - Reviews


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See why our users from 154 countries love us for their exam prep! Including 160 reviews for the DHA EMT-B exam.

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we're here to help you prepare for test day.

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DHA Emergency Medical Technician - Basic - Test Reviews Sample Questions

Which part of the heart receives blood from the pulmonary veins?

Correct Answer:
left atrium


the correct answer to the question "which part of the heart receives blood from the pulmonary veins?" is the left atrium. the left atrium is one of the four chambers of the heart, specifically one of the two upper chambers known as atria. the primary function of the left atrium is to act as a holding chamber for blood returning from the lungs and to act as a pump to transport blood to other areas of the heart.

the pulmonary veins are responsible for carrying oxygen-rich blood from the lungs back to the heart. unlike most veins, which carry oxygen-poor blood, the pulmonary veins are unique in that they carry oxygenated blood. these veins enter the left atrium of the heart. once the oxygen-rich blood enters the left atrium, it is then transported through the mitral valve into the left ventricle.

the left ventricle, another chamber of the heart, then pumps this oxygen-rich blood out through the aorta to the rest of the body, supplying organs and tissues with the oxygen necessary for energy production and metabolic functions. this efficient circulation is crucial for maintaining the body’s overall health and functionality.

in contrast, the right atrium of the heart receives oxygen-poor blood from the body through the superior and inferior vena cava. the blood that enters the right atrium is then pumped into the right ventricle, which sends it to the lungs via the pulmonary artery for re-oxygenation. this cycle of blood flow between the heart, lungs, and body is essential for the respiratory exchange processes that sustain life.

thus, understanding the role of the left atrium in receiving blood from the pulmonary veins highlights its crucial position in the cardiac cycle, ensuring that oxygenated blood is efficiently routed through the heart to support the metabolic needs of the body.

A condition that results when the placenta is oddly placed, such as very low in the uterus or over the cervical opening, resulting in tearing of the placenta, is known as which of the following?

Correct Answer:
placenta previa.


placenta previa is a condition during pregnancy where the placenta is abnormally positioned in the uterus, often covering the cervix or being located very low in the uterus. this placement can cause significant complications during pregnancy and delivery. normally, the placenta attaches to the upper part of the uterus, away from the cervix, which is the opening that leads to the birth canal.

in cases of placenta previa, because the placenta partially or fully covers the cervix, it can lead to symptoms such as painless, bright red vaginal bleeding during the second or third trimester. this bleeding is often the first sign of the condition. the exact cause of placenta previa is not fully understood, but risk factors include having had previous surgeries on the uterus, including cesarean deliveries, being pregnant with multiple babies, and having had placenta previa in a previous pregnancy.

the diagnosis of placenta previa is typically made via ultrasound, either during routine pregnancy screenings or after an episode of bleeding. once diagnosed, the condition requires careful monitoring to manage the health of both the mother and the fetus. the primary danger associated with placenta previa is severe bleeding (hemorrhage) during labor and delivery, which can be life-threatening.

management strategies for placenta previa depend on the amount of bleeding, the gestational age of the fetus, and the overall health of the mother. in cases where the bleeding is minimal and the pregnancy is not near term, bed rest and close monitoring may be recommended. if significant bleeding occurs or the pregnancy is near term, a cesarean delivery (c-section) may be required to ensure the safety of both mother and child.

thus, placenta previa is a serious obstetric condition that necessitates careful medical oversight to prevent and manage potentially severe complications during pregnancy and childbirth.