Nursing Elites

1. Where does the nerve impulses send neurotransmitters across a synapse to a muscle cell to stimulate muscle contraction?

• A. sarcomere
• B. tendon
• C. myelin sheath
• D. neuromuscular junction

Correct answer: D

Rationale: The neuromuscular junction is the specific area where nerve impulses trigger the release of neurotransmitters that cross the synaptic gap to bind to receptors on the muscle cell membrane. This binding initiates muscle contraction by stimulating the muscle cell. The sarcomere is the basic contractile unit in a muscle fiber, not the location where nerve impulses communicate with muscle cells. Tendons are connective tissues that attach muscles to bones and are not involved in transmitting nerve impulses. The myelin sheath is a protective covering around nerve fibers but is not directly involved in transmitting neurotransmitters to muscle cells for muscle contraction.

2. How are kidney stones formed?

• A. Due to excess water not being reabsorbed
• B. When minerals crystallize in the urine
• C. When electrolytes become too concentrated
• D. All of the above

Correct answer: B

Rationale: Kidney stones are formed when minerals in the urine crystallize and stick together to form solid masses. Excess water not being reabsorbed (option A) does not directly contribute to kidney stone formation. Similarly, electrolytes becoming too concentrated (option C) is not a direct cause of kidney stone formation. The correct answer is B because the crystallization of minerals in the urine leads to the formation of kidney stones.

3. Which part of the neuron insulates and speeds up the transmission of nerve impulses along the axon?

• A. Dendrite
• B. Myelin sheath
• C. Synapse
• D. Cell body

Correct answer: B

Rationale: The myelin sheath is a fatty layer that surrounds the axon of a neuron, providing insulation and speeding up the transmission of nerve impulses. This insulation helps prevent the loss of electrical signals as they travel along the axon, allowing for faster and more efficient communication within the nervous system. Dendrites are branching extensions of a neuron that receive signals from other neurons, the synapse is the junction between two neurons where communication occurs, and the cell body contains the nucleus and organelles of the neuron, but none of these structures provide insulation for the transmission of nerve impulses along the axon.

4. What literary device is used in the phrase 'a heart of gold'?

• A. Metaphor
• B. Simile
• C. Hyperbole
• D. Personification

Correct answer: A

Rationale: The correct answer is A, Metaphor. A metaphor is a figure of speech that directly compares two unlike things by stating that one thing is another. In the phrase 'a heart of gold,' the good nature of a person is being directly compared to gold, indicating that the person is kind, valuable, and precious, much like gold. This comparison is not using 'like' or 'as,' which would make it a simile, but rather it is a direct assertion, making it a metaphor. Simile involves comparing two things using 'like' or 'as,' which is not present in this phrase. Hyperbole is an exaggeration, which is not the case here. Personification gives human qualities to non-human entities, which is also not occurring in 'a heart of gold.'

5. The patient’s preoperative evaluation is scheduled for next Wednesday. In the sentence, the prefix pre- indicates that the evaluation will take place at which of the following times?

• A. before the operation
• B. after the operation
• C. during the operation
• D. outside of the operation

Correct answer: A

Rationale: The prefix 'pre-' typically means before. In this case, 'preoperative' refers to activities that occur before an operation. Therefore, the patient's preoperative evaluation, scheduled for next Wednesday, will take place before the operation. Choices B, C, and D are incorrect because the prefix 'pre-' specifically indicates a time before the operation, not after, during, or outside of it.

Similar Questions