1. Osteogenic cells give rise to osteoblasts, but _______ arise from monocytes of the blood.
 

a.  osteoclasts
b.  fibroblasts
c. chrondrocytes
d. osteocytes
e. osteoprogenitor cells
 

2.  The main reason osteoporosis is most common in elderly women is their lack of

a. estrogen
b. osteoclast activity
c. parathormone
d. dietary calcium
e. exercise
 

3.  Which movement is specific to the foot?

a. pronation
b. elevation
c. dorsiflexion
d. abduction
e. circumduction
 

4.  Action potentials are propagated from the surface to the interior of the muscle fiber by way of the

a. sarcomeres
b. sarcoplasmic reticulum
c. endomysium
d. myofibrils
e. T tubules
 

5. In a relaxed muscle fiber, the myosin head-binding sites of actin are blocked by

a. tropomyosin
b. troponin
c. calcium ions
d. myosion heads
e. intermediate filaments
 

6. The deltoid muscle is named after its

a. size
b. shape
c. location in body
d. action it performs
e. number of origin sites
 

7. Which of the following is not true of skeletal muscle?

a.  It contains more than one nucleus
b.  It contains more than one mitochondria
c.  It is under conscious control
d.  Its fibers run parallel to each other
e.  It is not striated
 

8.  Which cell produces myelin?

a.  astrocyte
b.  oligodendrocyte
c.  microglia
d.  neuron
e.  myelinocyte
 

9.  Unipolar neurons are found

a.  everywhere in the body
b. nowhere in the body - they don't exist
c.  in the retina of the eyes
d.  in the dorsal root ganglia
e.  at the neuromuscular junction
 

10.  The cerebral aqueduct connects the

a. lateral ventricles to each other
b. lateral ventricles to the third ventricle
c. third ventricle to the fourth ventricle
d. fourth ventricle to subarachnoid space
e.  lateral ventricles to the fourth ventricle
 
  Answers