Nokea
Which structure allows communication between the hemispheres?
- A. reticular formation
- B. temporal lobe
- C. contralateral bridge
- D. corpus callosum
Correct Answer: D
Rationale: The corpus callosum is a thick bundle of nerve fibers that connects the left and right hemispheres of the brain, allowing for communication and coordination between them. It enables the integration of information from both sides of the brain, facilitating complex cognitive processes and motor coordination. Damage to the corpus callosum can result in disconnection syndromes, where the hemispheres cannot communicate effectively.
You may also like to solve these questions
The client newly diagnosed with multiple sclerosis (MS) states, 'I don't understand how I got multiple sclerosis. Is it genetic?' On which statement should the nurse base the response?
- A. Genetics may play a role in susceptibility to MS, but the disease may be caused by a virus.
- B. There is no evidence suggesting there is any chromosomal involvement in developing MS.
- C. Multiple sclerosis is caused by a recessive gene, so both parents had to have the gene for the client to get MS.
- D. Multiple sclerosis is caused by an autosomal dominant gene on the Y chromosome, so only fathers can pass it on.
Correct Answer: A
Rationale: MS has a genetic component that increases susceptibility, but environmental factors, such as viral infections, also play a significant role in its development.
A patient learns that abdominal pain is originating from the liver. The nurse should explain to the patient that the impulses from receptors in the internal organs to the central nervous system are transmitted from which type of neurons?
- A. Interneurons
- B. Efferent neurons
- C. Somatic sensory neurons
- D. Visceral sensory neurons
Correct Answer: D
Rationale: Visceral sensory neurons transmit impulses from internal organs, such as the liver, to the central nervous system. Somatic sensory neurons transmit impulses from the skin and skeletal muscles, while efferent neurons carry motor impulses. Interneurons are found entirely within the central nervous system. This distinction is important for understanding pain pathways.
If a patient displays a positive Babinski sign, the nurse should:
- A. Document the finding and consider further evaluation for neurological abnormalities.
- B. Ignore the finding as it is a normal response.
- C. Measure the patient's blood glucose levels.
- D. Assess the patient's skin color and temperature.
Correct Answer: A
Rationale: A positive Babinski sign in an adult indicates possible neurological dysfunction and requires documentation and further evaluation. Ignoring the finding or assessing unrelated parameters is inappropriate.
An interneuron has _____________.
- A. long dendrites and a short axon
- B. long dendrites and a long axon
- C. short dendrites and a long axon
- D. short dendrites and a long or short axon
Correct Answer: D
Rationale: Interneurons, which are found within the CNS, typically have short dendrites and either a long or short axon. These neurons act as connectors between sensory and motor neurons, integrating and processing information to generate appropriate responses. The structure of interneurons allows them to facilitate communication within the CNS, enabling complex reflexes and higher-order cognitive functions.
In which structure do sperm mature after they are produced?
- A. the prostate gland
- B. the epididymis
- C. the bulbourethral glands
- D. the seminal vesicles
Correct Answer: B
Rationale: The epididymis is the correct answer because it is the coiled tube where sperm mature and gain motility after being produced in the testes. This maturation process is essential for sperm to become capable of fertilizing an egg. The epididymis also stores sperm until they are ejaculated during sexual activity.