Which layer of the heart contains muscle fibers that contract to pump blood?
a. Myocardium
b. Endocardium
c. Epicardium
d. Pericardium
A
The myocardium is the middle layer of muscle fibers of the heart that contract to pump blood. The endocardium is the lining of the inner surface of the heart chambers, the epicardium is the outer layer of the heart muscle, and the pericardium is the membranous sac that surrounds the heart.
You might also like to view...
The nurse at a long-term care facility is teaching unlicensed care providers about some of the factors that characterize adverse drug reactions in the elderly residents. Which teaching points are valid? (Select all that apply.)
A) "Even when a resident stops taking a drug, a reaction can take place after the fact.". B) "Even when a resident has been taking a drug for a long time, a drug reaction can still occur.". C) "Most 'drug reactions' are in fact age-related changes that are mistakenly attributed to medications.". D) "Older adults often have signs and symptoms of adverse reactions that are very different from those of younger adults.". E) "While older adults are prone to adverse reactions, these reactions tend to resolve more quickly than in younger people.".
These statements are about physical restraints. Which is correct?
a. They are attached to the person's chair. b. They are attached to the headboard of the bed. c. The person can easily remove them. d. They limit movement or access to one's body.
Which type of research literature would be included in grey literature sources?
a. Book chapters b. Dissertations c. Journal articles d. Textbooks
A(n) ________ is a sealed glass container that is snapped open and usually holds one dose of liquid medication.
Fill in the blank(s) with the appropriate word(s).