Nokea
The effect of calcium ions on neurotransmitter release at synapses include:
- A. vesicular fusion
- B. tonic depolarization of the presynaptic neurone
- C. post-tetanic potentiation
- D. all above
Correct Answer: D
Rationale: Calcium ions trigger vesicular fusion, contribute to post-tetanic potentiation, and can cause tonic depolarization in the presynaptic neuron. These effects are essential for synaptic plasticity and neurotransmission.
You may also like to solve these questions
A fatal infectious disease known as: 'Mad cow disease' is medically known as:
- A. Spongiform meningitus.
- B. Spongiform Spirilosis.
- C. Meningial encephalopathy.
- D. Spongiform encephalopathy.
Correct Answer: D
Rationale: Spongiform encephalopathy, commonly known as 'mad cow disease' or Variant Creutzfeldt-Jakob Disease (vCJD), is a fatal neurodegenerative disorder caused by abnormal prion proteins. These proteins induce the misfolding of normal cellular proteins in the brain, leading to brain damage and the characteristic spongy appearance of brain tissue. The disease is transmissible and has no known cure, making it a significant public health concern.
The midbrain
- A. Is largely in the middle cranial fossa
- B. Is supplied by the anterior inferior cerebellar artery
- C. Lies between pons and upper spinal cord
- D. Contains the oculomotor nuclei
Correct Answer: D
Rationale: The midbrain contains the oculomotor nuclei, which control eye movement. It is located between the pons and diencephalon and is supplied by the posterior cerebral artery.
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.
The nurse is preparing material about impulse transmission to help with a presentation on the neurological system. When discussing spinal nerves, the nurse will include that each spinal nerve is made up of the dorsal root and which other root?
- A. Medial
- B. Lateral
- C. Ventral
- D. Proximal
Correct Answer: C
Rationale: Each spinal nerve has two roots: the dorsal root, which carries sensory impulses into the spinal cord, and the ventral root, which carries motor impulses away from the spinal cord. The medial, lateral, and proximal roots are not part of the spinal nerve structure. Understanding this anatomy is essential for explaining how sensory and motor functions are integrated.
Priority Decision: Following change-of-shift handoff, which patient should the nurse assess first?
- A. A 58-year-old male experiencing phantom pain and requesting analgesic
- B. A 72-year-old male being transferred to a skilled nursing unit following repair of a hip fracture
- C. A 25-year-old female in left leg skeletal traction asking for the weights to be lifted for a few minutes
- D. A 68-year-old male with a new lower leg cast complaining that the cast is too tight and he cannot feel his toes
Correct Answer: D
Rationale: Cast tightness and loss of sensation indicate potential neurovascular compromise.