FREE SCMA Basic Questions and Answers
The heart's ______ layer is known as the endocardium.
Explanation:
The heart's innermost layer is called the endocardium. It is a thin, smooth layer of tissue that covers the heart valves and lines the heart's chambers. This layer keeps blood from clotting and gives blood in the heart a smooth surface to flow over. It is made up of connective tissue and endothelial cells.
This is used to describe an EKG's movement away from the isoelectric line.
Explanation:
The movement in an EKG away from the isoelectric line is referred to as the ""waveform”. The waveform in an EKG shows the different electrical changes that take place throughout each heartbeat. The electrical activity of the heart is graphed. It displays the cardiac muscle's depolarization and repolarization, which is crucial for understanding how the heart works and identifying any anomalies.
What is the ventricular polarization's initial negative deflection?
Explanation:
The first negative deflection produced by ventricular polarization is represented by the Q wave. It usually appears as a slight downward deflection preceding the main positive deflection (R wave) on an electrocardiogram (ECG). The interventricular septum, the first area of the ventricles to contract, depolarizes when the Q wave appears. It is crucial for the diagnosis of some cardiac disorders where aberrant Q waves may be detected, such as myocardial infarction.
The ability to trigger electrical impulses on its own without stimulation is called:
Explanation:
The ability of some cells, including cardiac pacemaker cells, to produce electrical impulses on their own without outside stimulus is referred to as Automaticity. These cells can spontaneously produce electrical impulses because they have the innate capacity to depolarize and produce action potentials. This characteristic, which guarantees the regular and coordinated contraction of cardiac muscle cells, is essential for the heart's effective operation.
What does “Qhs” on a prescription mean?
Explanation:
When a prescription is abbreviated ""qhs,"" it means ""at bedtime,"" meaning that the drug should be taken before bed. This scheduling enables the drug to be absorbed and start working while the patient is sleeping at night. Taking the medication right before bed can help control any problems or symptoms that can interfere with sleep or necessitate resting over night.
What does “Po” mean?
Explanation:
The Latin phrase ""per os,"" which means ""by mouth,"" is shortened to ""po"". In medical settings, this term is frequently used to suggest that a medication or therapy should be given orally, usually by ingesting a pill or liquid. Selecting this option implies that oral administration of the medication is the appropriate mode of administration, as opposed to rectal, sublingual, or intravenous methods.
What bleach-to-water ratio is recommended for disinfection?
Explanation:
For disinfection, a bleach-to-water ratio of 1:10 is advised. This implies that you should use ten parts water for every one component of bleach. To guarantee efficient disinfection and eradicate bacteria, viruses, and other pathogens, this ratio is frequently utilized. While using too little bleach may not efficiently kill germs, using too much might be hazardous.
Which area of the heart receives the body's deoxygenated blood?
Explanation:
The area of the heart that receives blood from the body that is deoxygenated is called the right atrium. It is located on the right side of the heart and is one of its four chambers. Blood drawn from the body returns to the heart through the major veins known as the superior and inferior vena cava, which open up into the right atrium. Blood that has deoxygenated is pumped from the right atrium into the right ventricle, where it is subsequently taken up by the lungs.
What is a decrease in the number of respiration that happens while a person is sleeping and may also be due to certain diseases?
Explanation:
An increased breathing rate is referred to as tachypnea. According to the explanation provided, certain diseases or sleep leads to a decrease in the number of respirations.
Which of the following is NOT a standard precaution?
Explanation:
Using gloves while handling any bodily fluid, tossing needles in a biohazard trash bin, and wearing a face shield when there's a chance of a splash are all considered standard procedures.
Which is NOT a medical assistant's duty?
Explanation:
In the healthcare setting, a medical assistant's duties may include setting up the examination area, getting the patient ready for treatment, and taking the patient's vital signs. In most cases, a physician or nurse practitioner with specific expertise performs a patient’s physical exam.