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 ["A","C","D"]
Explanation
Choice A rationale
An electrical cord on the floor over a walkway can pose a tripping hazard, increasing the risk of falls. It’s important to keep walkways clear of any obstacles to prevent falls.
Choice B rationale
Using a cane to ambulate does not necessarily increase the risk of falls. In fact, canes are often used to improve balance and stability, reducing the risk of falls. However, it’s important that the cane is used correctly and is the right height for the individual.
Choice C rationale
Unsecured throw rugs, especially over a slippery surface like a tile floor, can easily cause someone to slip and fall. It’s recommended to secure rugs with non-slip backing or remove them entirely from high-traffic areas.
Choice D rationale
Macular degeneration can lead to vision loss, which can increase the risk of falls. Individuals with vision impairments may not be able to see hazards in their path, making them more prone to falls.
Correct Answer is C
Explanation
Choice A rationale
While the thickness of the tympanic membranes can indeed change with age, it typically increases rather than decreases. Thickening of the tympanic membranes can contribute to hearing loss by reducing the ability of the ear to transmit sound vibrations.
Choice B rationale
Tinnitus, or ringing in the ears, is not typically decreased in older adults. In fact, tinnitus is often more common in older individuals and can be a sign of age-related hearing loss.
Choice C rationale
A decreased ability to hear high-frequency sounds is a common physiological change associated with aging. This is often one of the first signs of age-related hearing loss.
Choice D rationale
Decreased ear wax is not typically associated with aging. In fact, some older adults may produce more ear wax, which can contribute to hearing problems if it becomes impacted.
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