Free TEAS Test Exam Braindumps (page: 47)

Page 47 of 124

Which of these is known as the pacemaker of the heart?

  1. AV node
  2. cardiac plexus (nerve fibers)
  3. SA node
  4. muscle fibers of the atria

Answer(s): C



Which valve is found between the left atrium and the left ventricle?

  1. the tricuspid valve
  2. the pulmonary valve
  3. the aortic valve
  4. the mitral valve

Answer(s): D



Which layer of the skin contains hair follicles, sweat glands, and nerves?

  1. the dermis
  2. the subcutaneous layer
  3. the basal layer
  4. the epidermis

Answer(s): A



Which element is essential for the normal production of the hormone thyroxine?

  1. phosphorus
  2. iodine
  3. calcium and vitamin D
  4. magnesium

Answer(s): B



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