Bone is connective tissue, in which the intercellular matrix has ...

[beccaep]

Bone is connective tissue, in which the intercellular matrix has been impregnated with inorganic calcium salts, that has great tensile and compressible strength but is light enough to be moved by coordinate muscle contractions.
 
  One third of the dry weight of bone is composed of which of the following?
  A)
  Bone cells, inorganic salts, and blood vessels
  B)
  Hydroxyapatite, calcium carbonate, and calcium fluoride
  C)
  Bone cells, blood vessels, and nerves
  D)
  Organic matter and inorganic salts

Question 2

A medical student is assessing a 22-year-old male who has come to the emergency department because of pain and swelling in his scrotum over the past 36 hours.
 
  The attending physician has told the student that she suspects epididymitis. Which of the medical student's following questions is most likely to be useful in the differential diagnosis of epididymitis?
  A)
  Do you know if your vaccinations for mumps are up to date?
  B)
  Have you had unprotected sex in the past?
  C)
  Do you have a sensation of heaviness in the left side of your scrotum?
  D)
  Has it been painful when you get an erection lately?

[Rilsmarie951]

Answer to Question 1

Ans:
C

Feedback:

The intercellular matrix is composed of two types of substances: organic matter and inorganic salts. The organic matter (bone cells, blood vessels, and nerves) constitutes approximately one third of the dry weight of bone; the inorganic salts (including hydroxyapatite, calcium carbonate, and calcium fluoride) make up the other two thirds.

Answer to Question 2

Ans:
B

Feedback:

Sexually transmitted infections are a common contributing factor to epididymitis. Mumps are more often a precursor to orchitis, and heaviness on the left side is associated with varicocele. Pain with an erection is not a noted symptom of epididymitis.

[beccaep]

Excellent

[essyface1]

Gracias!