A physician orders a lumbar puncture (spinal tap) for his 43…

A physician orders a lumbar puncture (spinal tap) for his 43-year-old female patient in order to obtain a sample of cerebrospinal fluid (CSF) to diagnose bacterial versus viral meningitis. He explains to her that this procedure will be done in the lower back, between the spinous processes of the L3 and L4 vertebrae. What is the anatomical basis for performing the lumbar puncture at this location?

A 65-year-old male presents with a severely painful rash and…

A 65-year-old male presents with a severely painful rash and skin eruptions that are localized entirely on one side of his body. The rash closely follows the dermatome of C7. The man is diagnosed with “shingles” in which the herpes zoster virus has proliferated in which anatomical structure?

Calcium has a very narrow homeostatic range and is under tig…

Calcium has a very narrow homeostatic range and is under tight hormonal control. Using complete sentences (no bullet points please). Tell me I. The hormones involved in maintaining calcium homeostasis II. How does each hormone contribute to maintaining calcium homeostasis (be specific here)         Meaning hormone A is active under conditions of these calcium level conditions and would do a,b,c,e, f etc). Hormone          B is active under these conditions and changes calcium concentration by x,y,z. Do not forget the name the cells                      involved.  III. What is Wolffe’s law of bone