Muscular System
Which of the following is true regarding aging and the muscular system?
A. Speed of contractions increases
B. Diet has no impact on aging muscle
C. Muscle strength declines with age
D. Muscle fiber endurance decreases
C. Muscle strength declines with age
Muscle tissue:
A. regulates blood flow.
B. produces heat to help regulate body temperature.
C. controls passage of substances through body openings.
All of these are correct
The upper chambers of the heart are called __________.
atria
Plasma makes up what percentage of the blood?
55%
Which abbreviation is used for the term hemoglobin?
Hgb
A group of inherited disorders characterized by muscle weakness and a loss of muscle tissue?
Muscular dystrophy
A muscle __________ is caused when muscles or tendons are excessively stretched.
strain
Which of following is a membrane that covers the heart?
pericardium
When blood coagulates on a vessel wall in the absence of a known injury, it is correctly referred to as __________ .
a thrombus
A woman of childbearing age should know her Rh type because if she is Rh-negative and conceives a child that is Rh-positive, __________ .
her second baby will have erythroblastosis fetalis
An early sign of tetanus is ________.
muscle spasm in the jaw and neck
Which of the following is the thickest layer of the heart, which is made up of muscle?
myocardium
The ________ have walls that are one cell thick.
capillaries
Red blood cells live for approximately __________ .
four months
People with which blood type are universal donors?
O
As aging occurs, muscle contractions ________.
A. do not change
B. become slower
C. become stronger
D. become faster
E. become absent
B. become slower
Which part of the cardiac conduction system is located in the wall of the right atrium?
SA node
The correct term for an abnormal or irregular heart rhythm is:
dysrhythmia
Blood platelets are essential for __________ .
clotting
When a part of a thrombus breaks off, it is referred to as __________ .
an embolus
Monique is a 79-year-old patient who enjoys being active. Recently, however, her arthritis is getting worse, and she has been having more trouble moving around lately. She tells you that she wants to exercise and stay active, but she is not sure what kinds of exercise she can do now. Which of the following recommendations might you make?
"Try swimming or exercising your joints underwater."
What causes a myocardial infarction?
obstruction of blood flow to the heart muscle
The strongest blood vessels, which carry blood away from the heart, are:
arteries
The circuit or route blood travels from the heart through the aorta directly to the coronary arteries to supply blood to the heart's myocardium is the
coronary circulation.
Which of the following individuals is most at risk for erythroblastosis fetalis?
the second Rh-positive fetus born to an Rh-negative mother