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Clinical coverage and case studies have been expanded throughout.
NEW!
At the Clinic
End-of-chapter sections now contain
an At the Clinic feature, which help you
apply what you’ve learned. By learning related
clinical terms and reading short Case Studies
and answering questions, you will begin to
prepare for your future career.
Let’s continue our tale of Mrs.
DeStephano’s medical problems,
this time looking at the notes made
detailing observations of her skeletal
musculature.
Severe lacerations of the muscles of the right leg and knee
Damage to the blood vessels serving the right leg and knee
Transection of the sciatic nerve (the large nerve serving most of
the lower limb), just above the right knee
Her physician orders daily passive range-of-motion (ROM) exercise
and electrical stimulation for her right leg and a diet high in
protein, carbohydrates, and vitamin C.
1.
Describe the step-by-step process of wound healing that
will occur in her fleshy (muscle) wounds, and note the
consequences of the specific restorative process that occurs.
2.
What complications in healing can be anticipated owing to
vascular (blood vessel) damage in the right leg?
3.
What complications in muscle structure and function result
from transection of the sciatic nerve? Why are passive ROM
and electrical stimulation of her right leg muscles ordered?
4.
Explain the reasoning behind the dietary recommendations.
(Answers in Appendix H)
Case Study
Muscular System
AT TH E CLIN IC
NEW!
Homeostatic Imbalance
Clinical Questions
can be
assigned to you by your
instructor on MasteringA&P.
They help strengthen your
understanding of how the
body works to stay in balance
and what happens when it falls
out of balance.
Mastering
A&P
®
NEW!
Case Study Coaching Activities
increase your problem-solving skills and
prepare you for your future career.
Mastering
A&P
®
Homeostatic
Imbalance
Homeostatic Imbalance sections
are integrated within the text and
alert you to the consequences of
body systems not functioning
optimally. These pathological
conditions are integrated with
the text to clarify and illuminate
normal functioning.
Homeostatic Imbalance
6.1
Minute changes from the homeostatic range for blood calcium
can lead to severe neuromuscular problems ranging from hyper-
excitability (when blood Ca
2
1
levels are too low) to nonrespon-
siveness and inability to function (with high blood Ca
2
1
levels).
In addition, sustained high blood levels of Ca
2
1
, a condition
known as
hypercalcemia
(hi
0
per-kal-se
9
me-ah), can lead to un-
desirable deposits of calcium salts in the blood vessels, kidneys,
and other so± organs, which may hamper their function.
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