Sympathetic nerve fibers that innervate blood vessel walls are found primarily in the_________. Select one: a. tunica interna b. tunica externa c. tunica media d. tunica adventitia e. tunica intima

Yasmin was diagnosed with an abdominal aortic aneurysm which means that part of the wall of the  abdominal aorta was ballooning out abnormallyHer physician peformed surgery to correct the aneurysm, and sent a sample of the vessel wall to pathology. The pathology report stated that Yasmin 's tunica media had very few elastic fibers, and her tunica externa had  few collagen fibers. How does this explain why she developed the aneurysm?

Two thalami are joined across the slit of the 3rd ventricle by the a. Septum b. Periventricular nuclei c. Mass intermedia d. Arcuate fasciculus

A patient with heart disease experiences pain at the base of the neck and in the left shoulder and upper limb during exercise. How would you explain the likely origin of this pain to the patient? HINT How does referred pain happen?