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
Explanation
Choice A rationale
Increased joint stiffness is a common age-related change in older adults.
Choice B rationale
Increased muscle mass is not typically an age-related change. In fact, older adults often experience a decrease in muscle mass, a condition known as sarcopenia.
Choice C rationale
Increased calcification of bones is not a typical age-related change. Older adults are more likely to experience osteoporosis, a condition characterized by a decrease in bone density.
Choice D rationale
Decreased balance is a common age-related change, but it is not the correct answer for this question.
Correct Answer is B
Explanation
Choice A rationale
Carbonic anhydrase inhibitors are not typically the first line of treatment for glaucoma. They work by decreasing the production of eye fluid, but they are usually used when other treatments have not been successful. Choice B rationale
Prostaglandin analogs, such as latanoprost and travoprost, are often the first line of treatment for glaucoma. They work by increasing the outflow of eye fluid to lower pressure in the eye.
Choice C rationale
Alpha-agonists are not typically the first line of treatment for glaucoma. They work by both decreasing the production of eye fluid and increasing its outflow, but they are usually used when other treatments have not been successful.
Choice D rationale
Beta-blockers, like timolol, are sometimes used as initial treatment for glaucoma, but they are not typically the preferred initial medication. They work by reducing the production of eye fluid.
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