Nokea
Which of the following parts of neuron transmits impulses away from the cell body?
- A. Dendrite
- B. Neurolemma
- C. Axon
- D. Synapse
Correct Answer: C
Rationale: The correct answer is C: Axon. The axon is the part of the neuron that transmits impulses away from the cell body towards other neurons or target cells. It is coated with a myelin sheath, which helps speed up the transmission of impulses. Dendrites (A) receive signals from other neurons, the neurolemma (B) is the outermost layer of the myelin sheath, and the synapse (D) is the junction between two neurons where neurotransmitters are released. Therefore, the axon is the only part of the neuron specifically responsible for transmitting impulses away from the cell body.
You may also like to solve these questions
Which of the following is one of the discharge criteria from ambulatory surgery for patients following surgery?
- A. Able to drive self home
- B. IV narcotics given less than 30 minutes
- C. Has home telephone before discharge
- D. Understands discharge instructions
Correct Answer: D
Rationale: The correct answer is D: Understands discharge instructions. This is crucial for patient safety and recovery post-surgery. Understanding discharge instructions ensures patients know how to care for themselves at home, manage medications, recognize warning signs, and follow-up instructions. Choice A is incorrect as patients should not drive after surgery due to potential impairment. Choice B is incorrect as IV narcotics administration timing is not a discharge criterion. Choice C is irrelevant to the patient's readiness for discharge. Understanding discharge instructions is the key factor in ensuring the patient's well-being and recovery after ambulatory surgery.
A patient teaching plan should include which of the ff. lifestyle modifications to help control hypertension?
- A. Regular aerobic exercise
- B. Three alcoholic beverages per day
- C. Low-tar cigarettes
- D. Daily multivitamin supplements
Correct Answer: A
Rationale: Step 1: Regular aerobic exercise helps lower blood pressure by improving heart health and circulation.
Step 2: Exercise reduces stress and promotes weight loss, factors that contribute to hypertension control.
Step 3: Alcohol consumption can raise blood pressure and should be limited or avoided.
Step 4: Smoking and using low-tar cigarettes can still raise blood pressure and have other negative health effects.
Step 5: Daily multivitamin supplements do not directly impact blood pressure control.
The physician orders cystoscopy and random biopsies of the bladder for a client who reports painless hematuria. Test results reveal carcinoma in situ in several bladder regions. To treat bladder cancer, the client will have a series of intravesical instillations of bacillus Calmette-Guerin (BCG), administered 1 week apart. When teaching the client about BCG, the nurse should mention that this drug commonly causes:
- A. Renal calculi
- B. Delayed ejaculation
- C. Hematuria
- D. Impotence
Correct Answer: C
Rationale: The correct answer is C: Hematuria. Bacillus Calmette-Guerin (BCG) is a type of immunotherapy used to treat bladder cancer by stimulating the immune system to attack cancer cells. One common side effect of BCG instillations is hematuria, which is the presence of blood in the urine. This occurs because BCG irritates the bladder lining, leading to inflammation and bleeding. It is important for the nurse to educate the client about this potential side effect so they are aware and can report any excessive bleeding to their healthcare provider promptly.
Other choices are incorrect:
A: Renal calculi - BCG therapy is not known to cause renal calculi.
B: Delayed ejaculation - BCG therapy is not associated with delayed ejaculation.
D: Impotence - BCG therapy is not linked to impotence.
A client on hemodialysis is complaining of muscle weakness and numbness in his legs. His lab results are: Na 136 mEq/L, K 5.9 mEq/L, Cl 100 mEq/L, ca 8.5 mg/dl. Which electrolyte imbalance is the client suffering from?
- A. Hyperkalemia
- B. Hypocalcemia
- C. Hypernatremia
- D. Hypochloremia
Correct Answer: A
Rationale: The correct answer is A: Hyperkalemia. In hemodialysis, potassium levels can be elevated due to impaired renal excretion. High potassium can lead to muscle weakness and numbness. The client's K level of 5.9 mEq/L is above the normal range (3.5-5.0 mEq/L), confirming hyperkalemia. Na, Cl, and Ca levels are within normal limits, ruling out hypernatremia, hypochloremia, and hypocalcemia as the client's primary electrolyte imbalance. Monitoring and managing hyperkalemia are crucial to prevent life-threatening complications like cardiac arrhythmias.
A client with advanced breast cancer is prescribed tamoxifen (Nolvadex). When teaching the client about this drug, the nurse should emphasize the importance of reporting which adverse reaction immediately?
- A. Vision changes
- B. Headache
- C. Hearing loss
- D. Anorexia
Correct Answer: A
Rationale: The correct answer is A: Vision changes. Tamoxifen can cause serious ocular side effects like retinopathy and corneal changes. These adverse reactions can lead to vision impairment or loss, which is crucial to report immediately to prevent permanent damage. Headache (B), hearing loss (C), and anorexia (D) are not typically associated with tamoxifen use and do not pose immediate threats to the client's health compared to vision changes. It is important for the nurse to prioritize educating the client on recognizing and reporting vision changes promptly to ensure timely intervention and prevent irreversible consequences.