Target Heart Rate Worksheet Page 8

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Answer Key
Testname: CHAPTER1PRACTICE
1) B
19) A. Males weigh more than
27) Major considerations should
2) B
females.
involve assessing the efficacy
3) B
B. Weight depends on gender;
of the treatment such that the
4) A
thus weight is dependent,
control group patients are not
5) A
gender is independent.
deprived as well as ensuring
6) E
C. Males weigh more than
that the experimental
7) C
females.
treatment is not less effective
8) A
D. Bar graph allows
than the standard treatments.
9) B
comparison of the average of
28) The prefix homeo-, meaning
10) C
two groups. No.
like or similar, is used to
11) E
20) The systolic pressure of both
indicate that the body's
12) A
genders increases with
internal environment is
13) A
advancing age.
maintained within a range of
14) B
15) D
21) The x-axis is horse name or
acceptable values rather than a
16) Possibly but not necessarily.
number; the y-axis is finish
fixed state. Some physiologists
There are gender differences in
time in minutes.
argue that the term
appropriate therapies because
22) Variable. It is recommended
homeodynamics better reflects
of physiological effects of
that the instructor create a
the small but constant changes
higher testosterone in males
map before evaluating the
that continuously take place in
compared to females, for
students' maps, and modify
the internal environment, as
example. Drugs are often not
the instructor map as
opposed to homeostasis, which
tested in children, and children
erroneously implies lack of
necessary.
also have a different hormonal
change.
23) A
environment than adults
24) Variable. One example is blood
(again, sex hormones are a
glucose concentration. The
good example, because their
input signal is a blood glucose
levels are low until just before
concentration outside of the
the onset of puberty). There are
normal range, the controller is
also racial differences in
effectiveness of therapies, and
the pancreas, and the output
while it is a contentious issue
signal is release of either
as to whether these represent
insulin or glucagon.
genetic or socioeconomic
25) Teleological: Heart rate
influences, they should be
increases because the
considered.
increased activity of skeletal
17) This is discussed in the
and cardiac muscles requires
"Physiological Systems" section
increased delivery of blood
of the chapter.
contents such as oxygen and
18) Extrapolation. The control
glucose. Mechanistic: Heart
value is the heart rate that
rate increases in response to
corresponds to an epinephrine
signals from the brain
dose equal to zero.
(pacemaker cells of the heart
are stimulated by the nervous
system).
26) This is discussed in "The
Science of Physiology" section
of the chapter, and in Fig. 1-7.
8

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