Nokea
The ventricular proliferative zone is:
- A. a region of cell division in the neural plate
- B. a region of cell division in Hensen's node
- C. a region of cell division in the neuroectoderm of Drosophila
- D. a region of cell division in the neural tube
Correct Answer: D
Rationale: The ventricular proliferative zone is a region of active cell division located in the neural tube. It gives rise to neurons and glial cells during nervous system development. This zone is essential for generating the vast number of cells required to form the complex structure of the brain and spinal cord.
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Regarding the circle of Willis
- A. Posterior cerebral is a branch of the internal carotid
- B. Anterior cerebral is the largest branch of the internal carotid
- C. Middle cerebral supplies motor but not sensory cortex
- D. Internal carotid gives off ophthalmic artery
Correct Answer: D
Rationale: The internal carotid artery gives off the ophthalmic artery, which supplies the eye and orbit. The circle of Willis provides collateral circulation to the brain.
Neuroglial cells support and provide nutrition for the ________.
- A. muscle cells
- B. glands
- C. neurons
- D. nephrons
Correct Answer: C
Rationale: Neuroglial cells, also known as glial cells, are non-neuronal cells that provide support and nutrition to neurons. They play essential roles in maintaining homeostasis, forming myelin sheaths, and protecting neurons from damage. Types of neuroglial cells include astrocytes, oligodendrocytes, microglia, and Schwann cells. These cells ensure the proper functioning of the nervous system by creating a supportive environment for neurons.
When an individual has a disruption of the ability to speak is known generally as
- A. Wernicke's aphasia
- B. Broca's aphasia
- C. Beidecker's aphasia
- D. Warnick's aphasia
Correct Answer: B
Rationale: Broca's aphasia is a language disorder that disrupts the ability to speak fluently. Individuals with this condition often experience difficulty in forming complete sentences, finding the right words, and articulating speech. This condition is caused by damage to Broca's area, located in the frontal lobe of the brain, which plays a critical role in speech production and language processing.
The substance that is released at axonal endings to propagate a nervous impulse is called:
- A. an ion
- B. nerve glue
- C. a neurotransmitter
- D. the sodium-potassium pump
Correct Answer: C
Rationale: Neurotransmitters are chemical substances released at axonal endings to propagate nervous impulses across synapses. Ions and the sodium-potassium pump are involved in generating action potentials, while nerve glue and action potentials are not substances released at axonal endings. Thus, C is the correct answer.
A patient with a fractured right hip has an anterior open reduction and internal fixation of the fracture. What should the nurse plan to do postoperatively?
- A. Get the patient up to the chair on the first postoperative day.
- B. Position the patient only on the back and the unoperative side.
- C. Keep the leg abductor pillow on the patient even when bathing.
- D. Ambulate the patient with partial weight bearing by discharge.
Correct Answer: C
Rationale: Using an abductor pillow maintains proper alignment.