The nurse is teaching a class on muscular coordination and explains it is the movement of what electrolyte that contributes to the process of muscle contraction and relaxation?

Magnesium.

Chloride.

Calcium.

Hydrogen.

Answer and Explanation

The Correct Answer is C

Choice A rationale

Magnesium plays a role in muscle relaxation but is not primarily responsible for muscle contraction. It helps in stabilizing the muscle membrane by acting as a natural calcium blocker. Deficiency in magnesium can lead to muscle cramps and spasms, but it does not directly cause muscle contraction and relaxation processes.

Choice B rationale

Chloride is an essential electrolyte involved in maintaining fluid balance and acid-base balance, but it does not directly influence muscle contraction and relaxation. It works in conjunction with sodium to regulate osmotic pressure and acid-base balance.

Choice C rationale

Calcium is crucial for muscle contraction. It is released from the sarcoplasmic reticulum within the muscle cells and binds to troponin, causing a conformational change that allows actin and myosin to interact and generate contraction. During relaxation, calcium ions are pumped back into the sarcoplasmic reticulum.

Choice D rationale

Hydrogen ions are involved in pH balance and acid-base regulation but do not directly affect muscle contraction and relaxation. Excess hydrogen ions (acidosis) can impair muscle function, but they are not the primary factor in muscle contraction processes.

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Correct Answer is D

Explanation

Choice A rationale

While maintaining patient confidentiality is crucial, it does not address the immediate medical needs of the patient with chronic renal failure. The primary concern should be addressing the health implications of their condition and ensuring proper care coordination.

Choice B rationale

Administering medications ordered immediately is essential, but it is not the first priority without knowing the patient's current status and medical history. The nurse needs to ensure that the medications prescribed are appropriate for a patient with chronic renal failure.

Choice C rationale

Providing teaching about chronic renal failure is important for long-term management but is not the first priority upon admission. Immediate medical needs and communication with the care team take precedence in this acute care setting.

Choice D rationale

Calling the admitting physician immediately is the first priority. The primary care provider needs to be aware of the patient's diagnosis of chronic renal failure to adjust treatment plans accordingly. Immediate communication ensures that all healthcare professionals are on the same page regarding the patient's care. .

A. Central nervous system. B. Parasympathetic nervous system. C. Sympathetic nervous system. D. Voluntary nervous system.

Correct Answer is B

Explanation

Choice A rationale

Cholinergic agonists primarily stimulate the parasympathetic nervous system rather than the central nervous system, affecting activities like digestion, salivation, and decreased heart rate.

Choice B rationale

Parasympathetic nervous system is the correct answer. Cholinergic agonists mimic acetylcholine and stimulate parasympathetic responses, promoting rest-and-digest functions such as reducing heart rate and enhancing glandular secretions.

Choice C rationale

The sympathetic nervous system is not stimulated by cholinergic agonists. Instead, this system is activated by adrenergic agonists, which prepare the body for fight-or-flight responses, increasing heart rate and blood pressure.

Choice D rationale

Voluntary nervous system control is not the primary target of cholinergic agonists. This system governs skeletal muscle movement and is influenced by neuromuscular junctions rather than the autonomic responses modulated by cholinergic drugs. .

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The nurse is teaching a class on muscular coordination and explains it is the movement of what electrolyte that contributes to the process of muscle contraction and relaxation?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The nurse admits a patient to the unit and learns the patient has recently been diagnosed with chronic renal failure but has not informed the primary care provider of this diagnosis.What is the nurse’s first priority?

Correct Answer is D

Explanation

When the nurse administers a cholinergic agonist to the patient the nurse's expectation is what system will be stimulated.

Correct Answer is B

Explanation

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