14) during quiet breathing,
a) only the internal intercostal muscles contract.
b) inspiration involves muscular contractions and expiration is passive.
c) inspiration is passive and expiration involves muscular contractions.
d) inspiration and expiration are both passive.
e) inspiration and expiration involve muscular contractions.
15) mary is in an automobile accident and suffers a spinal cord injury. she has lost
feeling in her lower body. her doctor tells her that swelling is compressing a portion of
her spinal cord. which part of her cord is likely to be compressed?
a) the anterior gray horns
b) the anterior gray commissures
c) ascending tracts
d) descending tracts
e) the anterior white commissures
16) the atrioventricular valves permit blood flow
a) in one direction only.
b) in both directions.
c) in many directions.
d) in opposite directions on the right and left.
e) from a ventricle to an atrium.
17) the ligament that encloses the ________ attaches to the tibial tuberosity.
18) the only ________ in the human body is the tail of the sperm.