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DANB's MBDA (MBDA) Practice Tests & Test Prep by Exam Edge - Review



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DANB's Missouri Test of Basic Dental Assisting Skills - Reviews


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Based on 200 reviews

Rofiah


"I found the practice tests extremely helpful. I passed the DANB RHS exam and felt that the subject matter was thoroughly covered by your practice tests. The viewing of films and answering questions on them was especially helpful. Thank you very much for the assistance in preparing for the DANB RHS exam."

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See why our users from 154 countries love us for their exam prep! Including 200 reviews for the DANB's MBDA 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.

   Excellent -- Based on 200 reviews

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DANB's Missouri Test of Basic Dental Assisting Skills - Test Reviews Sample Questions

A type of blood vessel with a wall made of three layers and carries blood away from the heart refers to:

Correct Answer:
arteries
arteries are the type of blood vessels that carry oxygenated blood away from the heart to various parts of the body. unlike veins, arteries have thick walls comprising three distinct layers, which are essential for maintaining blood pressure and proper blood flow through the circulatory system.

the innermost layer of an artery is called the endothelium or tunica intima. this layer is in direct contact with the blood flowing through the artery. it is smooth and lined with a type of cells called endothelial cells. these cells help to regulate blood clotting, immune function, and vessel constriction.

the middle layer, known as the tunica media, is primarily composed of smooth muscle cells and elastic fibers. this layer is thicker in arteries than in veins. the smooth muscle cells are crucial because they allow the arteries to constrict or relax, thereby controlling blood pressure. the elastic fibers provide the necessary elasticity that helps the artery walls to expand and contract as the heart pumps blood. this expansion and contraction facilitate the continuous flow of blood throughout the body.

the outer layer, or tunica externa (also known as tunica adventitia), is made up of connective tissue that contains collagen and elastic fibers. this layer provides structural support and protection to the artery. it also anchors the arteries to nearby organs and tissues, ensuring they stay in place despite the pressure of the blood flow.

in addition to their structural characteristics, arteries are also influenced by various physiological factors. sensory receptors within the arterial walls can detect changes in blood pressure and chemistry, initiating reflexes that adjust their diameter. sympathetic impulses from the nervous system can prompt the arteries to constrict, elevating blood pressure during activities or stress. conversely, the adrenal hormone epinephrine can either constrict or dilate arteries, depending on the type of receptors present on the smooth muscle cells.

overall, arteries play a critical role in the circulatory system by managing and maintaining blood pressure and ensuring efficient circulation of oxygen-rich blood from the heart to sustain all bodily functions.