A nurse is teaching a class about skeletal muscles.
Which of the following should the nurse identify as a function of skeletal muscles?
Skeletal muscles enable the heart to contract with each heartbeat
Skeletal muscles enable the bladder to contract during voiding
Skeletal muscles enable the bronchioles to dilate in the lungs
Skeletal muscles enable a hand to contract and form a fist
Skeletal muscles enable a hand to contract and form a fist
The Correct Answer is D
Choice A rationale
Skeletal muscles do not enable the heart to contract with each heartbeat. The heart has its own specialized muscle tissue known as cardiac muscle, which allows it to contract and pump blood throughout the body.
Choice B rationale
Skeletal muscles do not enable the bladder to contract during voiding. The detrusor muscle, a smooth muscle found in the wall of the bladder, contracts during urination to expel urine from the body.
Choice C rationale
Skeletal muscles do not enable the bronchioles to dilate in the lungs. The dilation and constriction of the bronchioles are controlled by the autonomic nervous system and the smooth muscles in the walls of the bronchioles.
Choice D rationale
Skeletal muscles do enable a hand to contract and form a fist. Skeletal muscles are responsible for all voluntary movements, including making a fist. When you want to make a fist, your brain sends a signal to the skeletal muscles in your hand and forearm, telling them to contract. This pulls on the tendons connected to your fingers, causing them to move and form a fist.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Hypoglycemia, or low blood sugar, is not typically a manifestation of the fight-or-flight response. In fact, the opposite is true. During the fight-or-flight response, the body’s glucose levels often increase to provide extra energy for the perceived threat.
Choice B rationale
Dilated pupils are a common physical manifestation of the fight-or-flight response. This physiological change allows more light to enter the eyes, enhancing vision and awareness of the environment during a stressful event.
Choice C rationale
Bronchial airway constriction is not typically associated with the fight-or-flight response. In fact, the bronchial airways often dilate during this response to allow for increased oxygen flow, which is necessary for physical exertion.
Choice D rationale
Decreased blood pressure is not a typical response to stress. During the fight-or-flight response, blood pressure usually increases to enhance blood flow to the muscles and brain.
Correct Answer is C
Explanation
Choice A rationale
Restlessness is an observable behavior, making it an objective finding.
Choice B rationale
Pacing is also an observable behavior, so it is considered an objective finding.
Choice C rationale
Anxiety is a subjective finding because it is based on the patient’s personal experience and cannot be directly observed.
Choice D rationale
Alertness is an objective finding because it can be directly observed and measured.
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