Question

What process helps cancer cells invade and spread to other parts of the body?

Answer 1

Correct Answers:

enzyme secretion

Rationale :

🧬Cancer cells secrete proteolytic enzymes (e.g., matrix metalloproteinases—MMP-2, MMP-9) that degrade the extracellular matrix (ECM) and basement membrane, creating physical pathways for invasion.

🧬By dissolving type IV collagen, laminin, and fibronectin, these enzymes remove mechanical barriers, enabling tumor cells to intravasate into blood/lymph vessels and extravasate at distant sites.

🧬Enzyme secretion also releases ECM-bound growth factors and exposes cryptic adhesion sites, further promoting motility and survival of malignant cells.

🧬This proteolysis works in tandem with epithelial–mesenchymal transition (EMT) and altered cell adhesion, but the direct tool of tissue penetration is enzyme-mediated ECM breakdown.

🧬Clinically, high MMP activity correlates with aggressiveness, metastasis, and poor prognosis, and is a target of anti-metastatic therapies.

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Answer 2

Correct Answers:

Growth factors

Rationale :

🌱Angiogenesis is initiated by pro-angiogenic growth factors—most notably VEGF (vascular endothelial growth factor) and bFGF/FGF-2—released by hypoxic tumor cells and stromal elements.

🌱These ligands bind endothelial tyrosine-kinase receptors, activating MAPK/PI3K pathways that drive endothelial proliferation, migration, and tube formation.

🌱HIF-1α stabilization in hypoxia upregulates VEGF transcription, making growth-factor signaling the primary trigger that starts neovessel sprouting.

🌱Downstream steps (e.g., protease activation, integrin switching, matrix remodeling) depend on the initial growth-factor signal to proceed.

🌱Therapeutically, anti-VEGF agents (e.g., bevacizumab) blunt this initiation step, reducing tumor vascularity and nutrient/oxygen supply.

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Answer 3

Correct Answers:

Brainstem hypoxia.

Rationale :

🧠Fixed, dilated pupils reflect failure of parasympathetic (Edinger–Westphal) output via cranial nerve III, a function integrated in the midbrain/upper brainstem.

🧠Brainstem hypoxia depresses these pupillary light reflex pathways, producing areflexic, dilated pupils—often bilateral in global ischemia or severe herniation syndromes.

🧠Loss of pupillary reactivity in this context signals critical neurologic deterioration and demands rapid management of airway, oxygenation, and intracranial pressure.

🧠The presentation fits central failure of constrictor pathways rather than peripheral causes and is a grave sign warranting immediate escalation.

🧠Continuous neuro-checks with GCS, pupillometry, and ICP control are essential to prevent secondary brain injury.

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Answer 4

Correct Answers:

Resting tremor that decreases with intentional activity

Rationale :

🧩Parkinson’s disease produces a resting, “pill-rolling” tremor (≈4–6 Hz) that lessens with voluntary movement and reappears at rest, a hallmark extrapyramidal sign.

🧩Pathophysiology centers on dopamine depletion in the substantia nigra pars compacta, disrupting basal ganglia circuits (direct/indirect pathways) that modulate motor output.

🧩The classic triad includes tremor, rigidity (cogwheel/lead-pipe), and bradykinesia, often with postural instability as disease advances.

🧩Tremor reduction during action reflects compensatory cortical control overriding basal ganglia dysfunction, contrasting with action/intention tremors seen in cerebellar disease.

🧩Recognition of this pattern guides therapy with levodopa/carbidopa, dopamine agonists, or deep brain stimulation targeting the STN/GPi.

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Answer 5

Correct Answers:

Spasticity

Rationale :

🦵In Multiple Sclerosis, demyelination of central motor pathways (corticospinal tracts) causes upper motor neuron (UMN) signs, notably spasticity—increased tone and velocity-dependent resistance.

🦵Spasticity reflects loss of descending inhibitory control, leading to hyperexcitable stretch reflexes, clonus, and hyperreflexia in affected limbs.

🦵Clinically it manifests as stiffness, scissoring gait, and difficulty with rapid alternating movements, impacting mobility and safety.

🦵Management may include physical therapy, stretching, baclofen/tizanidine, and in refractory cases intrathecal baclofen or botulinum toxin.

🦵Accurate documentation of tone grade and functional impact informs rehabilitation goals and treatment response over time.

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Answer 6

Correct Answers:

Cachexia

Rationale :

🥄Cancer cachexia is a multifactorial metabolic syndrome characterized by involuntary loss of skeletal muscle (± fat), anorexia, and systemic inflammation.

🥄Tumor-derived factors (e.g., PIF, cytokines TNF-α, IL-1, IL-6) drive proteolysis and lipolysis, increase resting energy expenditure, and blunt anabolic signaling, causing refractory weight loss.

🥄Unlike simple starvation, cachexia features muscle wasting despite adequate intake, and is not fully reversible by conventional nutrition support.

🥄Consequences include impaired function, treatment intolerance, and worse survival, making early multimodal care (nutrition, exercise, anti-inflammatories, appetite stimulants) crucial.

🥄Structured assessment (e.g., weight trajectory, SMI on CT, grip strength) guides interventions and goals of care.

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Answer 7

Correct Answers:

Vasogenic edema

Rationale :

💧Vasogenic cerebral edema results from breakdown of the blood–brain barrier (BBB), allowing plasma proteins and fluid to leak into the extracellular (interstitial) space—exactly as described.

💧Common in tumors, abscesses, trauma, and hemorrhage, it predominates in white matter, where loose fiber tracts permit fluid spread.

💧Clinically, it raises intracranial pressure (ICP) and can cause headache, vomiting, papilledema, and herniation if unaddressed.

💧Management targets the cause and may include osmotherapy (hypertonic saline, mannitol), head-of-bed elevation, controlled ventilation, and glucocorticoids when tumor-related (not for cytotoxic injury).

💧Differentiating from cytotoxic edema (intracellular swelling with intact BBB, e.g., early ischemia) guides therapy selection and prognosis.

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Answer 8

Correct Answers:

Abnormal increase in cerebrospinal fluid (CSF) volume

Rationale :

➡️Hydrocephalus is characterized by an abnormal accumulation of CSF within the ventricles of the brain, resulting in ventricular dilation and increased intracranial pressure (ICP).

➡️This may occur due to obstructed flow (noncommunicating) or impaired absorption (communicating) of CSF in the subarachnoid space.

➡️The excess CSF compresses surrounding brain tissue, leading to headache, nausea, gait disturbances, cognitive changes, or in infants, enlarged head circumference and bulging fontanelles.

➡️Causes include congenital malformations, hemorrhage, infection, or tumors obstructing CSF pathways.

➡️Management often involves ventriculoperitoneal (VP) shunt placement or endoscopic third ventriculostomy to restore CSF circulation and reduce pressure.

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Answer 9

Correct Answers:

Brain contusions and hematomas

Rationale :

🔷Acceleration-deceleration injuries (e.g., from car crashes) cause the brain to move rapidly within the skull, leading to coup-contrecoup lesions where tissue impacts opposite skull surfaces.

🔷This mechanical shearing produces cerebral contusions, intracerebral, or subdural hematomas due to ruptured blood vessels and damaged neurons.

🔷These lesions increase intracranial pressure (ICP) and may result in loss of consciousness, focal neurologic deficits, or herniation if untreated.

🔷Immediate monitoring for neurologic decline, pupil changes, and vomiting is crucial for early detection of hemorrhage.

🔷CT imaging confirms injury extent, and management includes ICP control, surgical evacuation if indicated, and neuroprotective care.

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Answer 10

Correct Answers:

Breast cancer

Rationale :

🧬Genetic screening is recommended for individuals with a family history of breast cancer, especially if multiple relatives or early-onset cases are noted.

🧬Mutations in the BRCA1 and BRCA2 tumor suppressor genes dramatically increase risk for breast and ovarian cancers.

🧬Identification enables proactive surveillance (e.g., mammography, MRI), chemoprevention, or prophylactic surgery to reduce risk.

🧬Genetic counseling helps patients understand inheritance patterns, ethical implications, and preventive choices.

🧬Screening may extend to relatives, particularly first-degree family members, to guide preventive care.

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☑️ NR412-EXAM4

No.

1 :
What process helps cancer cells invade and spread to other parts of the body?

2 :
What initiates the process of angiogenesis (development of new blood vessels)?

3 :
A patient presents to the emergency room after being found on the ground at home. The nurse assesses the patient's pupil response and finds them to be fixed and dilated. The nurse knows this is caused by what mechanism?

4 :
A nurse is assessing a client with Parkinson's disease. Which of the following findings are characteristic extrapyramidal symptoms associated with this condition?

5 :
The nurse is assessing a patient with Multiple Sclerosis and notes the lower extremities of a patient have increased tone and resistance. How would the nurse document the finding?

6 :
A nurse caring for a patient with progressive cancer notes that the patient has experienced significant loss of skeletal muscle and fat. Which of the following does the nurse document?

8 :
A patient's recent computed tomography (CT) scan has revealed the presence of hydrocephalus. What is the pathology of hydrocephalus?

9 :
A patient experiences an acceleration-deceleration head injury during a car crash. With this type of injury, the nurse knows that the immediate concern is the patient will be at risk for which of the following complications?

10 :
Genetic screening may be indicated for individuals who have a family history of which of the following neoplasms?

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☑️ NR412-EXAM4

No.

1 : What process helps cancer cells invade and spread to other parts of the body?

2 : What initiates the process of angiogenesis (development of new blood vessels)?

3 : A patient presents to the emergency room after being found on the ground at home. The nurse assesses the patient's pupil response and finds them to be fixed and dilated. The nurse knows this is caused by what mechanism?

4 : A nurse is assessing a client with Parkinson's disease. Which of the following findings are characteristic extrapyramidal symptoms associated with this condition?

5 : The nurse is assessing a patient with Multiple Sclerosis and notes the lower extremities of a patient have increased tone and resistance. How would the nurse document the finding?

6 : A nurse caring for a patient with progressive cancer notes that the patient has experienced significant loss of skeletal muscle and fat. Which of the following does the nurse document?

8 : A patient's recent computed tomography (CT) scan has revealed the presence of hydrocephalus. What is the pathology of hydrocephalus?

9 : A patient experiences an acceleration-deceleration head injury during a car crash. With this type of injury, the nurse knows that the immediate concern is the patient will be at risk for which of the following complications?

10 : Genetic screening may be indicated for individuals who have a family history of which of the following neoplasms?

1 :
What process helps cancer cells invade and spread to other parts of the body?

2 :
What initiates the process of angiogenesis (development of new blood vessels)?

3 :
A patient presents to the emergency room after being found on the ground at home. The nurse assesses the patient's pupil response and finds them to be fixed and dilated. The nurse knows this is caused by what mechanism?

4 :
A nurse is assessing a client with Parkinson's disease. Which of the following findings are characteristic extrapyramidal symptoms associated with this condition?

5 :
The nurse is assessing a patient with Multiple Sclerosis and notes the lower extremities of a patient have increased tone and resistance. How would the nurse document the finding?

6 :
A nurse caring for a patient with progressive cancer notes that the patient has experienced significant loss of skeletal muscle and fat. Which of the following does the nurse document?

8 :
A patient's recent computed tomography (CT) scan has revealed the presence of hydrocephalus. What is the pathology of hydrocephalus?

9 :
A patient experiences an acceleration-deceleration head injury during a car crash. With this type of injury, the nurse knows that the immediate concern is the patient will be at risk for which of the following complications?

10 :
Genetic screening may be indicated for individuals who have a family history of which of the following neoplasms?