Final answer:
People with Parkinson's disease may have trouble eating and bathing themselves due to decreased muscle control and coordination.
Step-by-step explanation:
People with Parkinson's disease may have trouble eating and bathing themselves due to decreased muscle control and coordination. This is because Parkinson's disease is a degenerative disorder of the central nervous system that mainly affects the muscular system and movement. The death of neurons in the midbrain leads to characteristic signs of the disorder, such as muscle tremor, muscle rigidity, slowness of movement, and postural instability. These motor symptoms make it difficult for individuals with Parkinson's disease to perform tasks such as eating and bathing independently.
This disorder is associated with the loss of dopamine-producing neurons in the substantia nigra, a part of the midbrain that plays a vital role in controlling movement. As a result, affected individuals experience symptoms such as resting tremors, muscular rigidity, bradykinesia (slowness of movement), and challenges with balance and posture, which impede their ability to perform daily tasks independently. Over time, Parkinson's disease can also lead to cognitive decline, depression, and anxiety, further complicating everyday activities. It is important to note that Parkinson's disease is primarily a neurodegenerative movement disorder rather than an issue related to the digestive system's enzyme production or heart rate.