1) match the lung volume with its description.
a. tidal volume
b. inspiratory reserve volume
c. expiratory reserve volume
d. residual volume
the additional air inhaled after a normal inspiration
2) the nervous system avoids muscle fatigue during submaximal contraction by
a) always recruiting slow-twitch motor units.
b) asynchronous recruitment.
c) synchronous recruitment.
d) always recruiting fast-twitch motor units.
3) poiseuille’s law is summarized this way:
a) pv = nrt
b) r l/r4
c) p = 2t/r
d) p1v1 = p2v2
4) meiosis of one cell results in production of
a) four gametes.
b) one gamete.
c) four gametes if male, one if female.
d) four gametes if female, one if male.
5) match the following structures with the appropriate description.
a. appendix
b. colon
c. duodenum
d. ileum
e. jejunum
distal-most section of small intestine
6) which brain area is considered to be a key integrating center for homeostasis?
a) hypothalamus
b) thalamus
c) pituitary gland
d) brain stem
e) medulla
7) the space that is surrounded by the tissue wall of hollow organs is known as
a) the peritoneal cavity.
b) the lumen.
c) the extracellular space.
d) the epidural space.
e) the tract.
8) the factor(s) that determine the duration of a twitch in various types of fibers is the
speed of the
a) removal of ca2+ ions from the sarcoplasm only.
b) hydrolysis of atp only.
c) movement of na+ across their membranes only.
d) removal of ca2+ ions from the sarcoplasm and hydrolysis of atp.
e) removal of ca2+ ions from the sarcoplasm and hydrolysis of atp and movement of
na+ across their membranes.
9) the speed with which force is developed by skeletal muscles is determined by the
a) ca2+ atpase activity.
b) sarcoplasmic calcium concentration.
c) myosin atpase isoform.
d) ca2+ atpase activity and sarcoplasmic calcium concentration.
e) ca2+ atpase activity, myosin atpase isoform, and sarcoplasmic calcium concentration.
10) match the symptoms to the problem.
a. damage to the cerebral cortex
b. degeneration of hair cells
c. ringing in the ears
d. dizziness and nausea
e. problems with structures of the middle ear
central hearing loss
11) the ease with which the lungs stretch in response to changes in pressure is termed
________.
12) the cells responsible for establishing the rate of a cardiac contraction are the
________.
13) ________ is the transfer of heat energy to air.
14) the ________ is the part of the sperm that contains the enzymes necessary for
fertilization.
15) why is the normal baroreceptor reflex absent during exercise?
16) explain how and why abnormal temperatures, either too high or too low, can be
dangerous.
17) as a muscle cell undergoes an eccentric contraction, sarcomere length will
________ as the length of the a band ________.