Nokea
The damage to IX, X & XII cranial nerves produce:
- A. bulbar palsy
- B. pseudobulbar palsy
- C. Brown-Sequard syndrome
- D. Argyle-Robertson syndrome
Correct Answer: A
Rationale: Bulbar palsy is the correct answer because it results from damage to the lower motor neurons of the cranial nerves IX, X, and XII, which are located in the medulla oblongata. This condition leads to dysphagia, dysarthria, and tongue atrophy due to the loss of motor control in the muscles of the pharynx, larynx, and tongue.
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Axoplasm is the ________ .
- A. blood plasma that nourishes a nerve
- B. fluid external to the axon but inside the myelin sheath
- C. cytoplasm of the dendrite
- D. cytoplasm of the axon
Correct Answer: D
Rationale: Axoplasm is the cytoplasm of the axon, the long, slender projection of a neuron that transmits nerve impulses. It contains organelles, cytoskeletal elements, and other components necessary for maintaining the axon's structure and function. Axoplasm plays a crucial role in the transport of molecules and organelles between the cell body and the axon terminals, ensuring the proper functioning of the neuron.
To plan effective care for patients diagnosed with somatic system disorders, the nurse should understand that patients have difficulty giving up the symptoms because the symptoms:
- A. are generally chronic in nature.
- B. have a physiological basis.
- C. can be voluntarily controlled.
- D. provide relief from health anxiety.
Correct Answer: D
Rationale: Step-by-step rationale:
1. Patients with somatic symptom disorders often experience health anxiety.
2. Symptoms provide a form of relief or distraction from this anxiety.
3. Understanding this helps nurses plan effective care by addressing underlying anxiety.
4. Option D is correct as it directly addresses the role of symptoms in providing relief.
Summary:
- Option A is incorrect because chronicity does not explain the reluctance to give up symptoms.
- Option B is incorrect as having a physiological basis does not necessarily relate to difficulty giving up symptoms.
- Option C is incorrect because symptoms in somatic system disorders are typically not voluntarily controlled.
Which is the most common neurotransmitter in the brain?
- A. serotonin
- B. glutamate
- C. dopamine
- D. GABA
Correct Answer: B
Rationale: Glutamate is the most abundant excitatory neurotransmitter in the brain and is involved in nearly all excitatory brain functions. It plays a key role in synaptic plasticity, learning, and memory. Glutamate binds to receptors on postsynaptic neurons, promoting the transmission of signals. However, excessive glutamate activity can lead to excitotoxicity, causing neuronal damage and contributing to conditions like stroke and neurodegenerative diseases.
Neurons come in which different type(s)?
- A. Sensory
- B. Motor
- C. Skeletal
- D. A and B
Correct Answer: D
Rationale: Neurons are classified into sensory neurons, which transmit information from sensory receptors to the central nervous system, and motor neurons, which carry signals from the central nervous system to muscles and glands. Skeletal refers to muscle tissue, not neuron types. Understanding these types helps explain how the nervous system processes and responds to information.
Electrical stimulation of the reticular formation would most likely cause an animal to:
- A. sneeze
- B. become blind
- C. wake up if it had been sleeping
- D. stop breathing
Correct Answer: C
Rationale: The reticular formation is a network of neurons located in the brainstem that plays a key role in regulating arousal and consciousness. Electrical stimulation of this area can activate the ascending reticular activating system (ARAS), which promotes wakefulness and alertness. This is why stimulating the reticular formation would most likely cause a sleeping animal to wake up. The reticular formation also helps filter sensory information and maintain attention.