A nurse is providing education on hepatitis to a group of nursing students.
Which type of hepatitis is primarily transmitted through contaminated food or water?

Choice A rationale

Bradykinesia is a fundamental component of the Parkinson's triad and refers to the generalized slowness of movement. This occurs due to the depletion of dopamine in the substantia nigra, which disrupts the basal ganglia's ability to facilitate motor output. Patients experience difficulty initiating movements and a reduction in automatic motions, such as swinging the arms while walking. It significantly impacts daily activities and is essential for a clinical diagnosis of the neurodegenerative disease.

Choice B rationale

Resting tremor is a classic sign often described as a pill-rolling motion of the hands. It typically occurs when the limb is relaxed and disappears during purposeful movement or sleep. This tremor results from the rhythmic firing of neurons in the subthalamic nucleus and globus pallidus due to the loss of dopaminergic inhibition. While not all patients exhibit a tremor, it is one of the most recognizable and frequent symptoms included in the hallmark diagnostic triad.

Choice C rationale

Memory loss and cognitive decline can occur in Parkinson's disease, particularly in the later stages, but they are not part of the "classic triad" used for initial diagnosis. Dementia associated with Parkinson's is a separate clinical consideration from the primary motor symptoms. The triad focuses specifically on motor dysfunction resulting from basal ganglia pathology. Memory issues are more central to Alzheimer's disease or Lewy body dementia rather than being a defining primary motor sign.

Choice D rationale

Loss of sensation is not a characteristic feature of Parkinson's disease. Parkinson's is primarily a motor system disorder affecting the extrapyramidal tract. While some patients may report vague aches or pains, true sensory loss involving touch, temperature, or proprioception suggests a peripheral neuropathy or a lesion in the sensory cortex or spinal cord. Sensory pathways remain intact in Parkinson's, as the underlying pathology is concentrated in the dopamine-producing cells of the midbrain.

Choice E rationale

Cogwheel rigidity is the third component of the classic triad. It refers to a specific type of muscle stiffness where there is a jerky, lead-pipe resistance to passive limb movement. This "cogwheel" sensation is thought to be the combination of basic rigidity and an underlying tremor. It affects both agonist and antagonist muscles equally. This increased muscle tone contributes to the characteristic stooped posture and masked facies seen in individuals progressing through the stages of Parkinson's.

Choice A rationale

Ethnicity is considered a non-modifiable risk factor because it is an inherent characteristic determined by genetic heritage and ancestral background. Research indicates that certain ethnic groups may have a higher genetic predisposition to cardiovascular conditions due to inherited metabolic patterns. Because an individual cannot alter their genetic makeup or ancestral lineage, this factor remains static throughout their life and cannot be changed through lifestyle or medical interventions.

Choice B rationale

Race is a non-modifiable risk factor rooted in biological and genetic variations that influence health outcomes. Specific racial groups may demonstrate higher incidences of hypertension or diabetes, which are precursors to artery disease. Since racial identity is determined at birth by genetics, it is impossible for a patient to modify this attribute. Clinical focus remains on managing the secondary conditions associated with racial predispositions rather than the race itself.

Choice C rationale

Age is a primary non-modifiable risk factor for coronary artery disease because the biological aging process leads to physiological changes in the vascular system. As individuals grow older, the arterial walls naturally become stiffer and less elastic, a process known as arteriosclerosis. This chronological progression is inevitable and constant for every human being. Therefore, medical professionals categorize age as a factor that cannot be influenced by behavioral or pharmaceutical means.

Choice D rationale

Cholesterol levels are modifiable risk factors because they can be significantly influenced by dietary choices, physical activity, and pharmacological treatments like statins. High levels of low-density lipoprotein (LDL) contribute to plaque buildup within the arterial walls, but this process can be slowed or reversed. By reducing saturated fat intake and increasing aerobic exercise, patients can successfully lower their total cholesterol and improve their cardiovascular health profile effectively.