Parkinson's disease often involves the degeneration of neurons that produce , which are located in a brain area called the

Parkinson's disease often involves the degeneration of neurons that produce dopamine, which are located in a brain area called the substantia nigra.

Explanation:

Parkinson's disease is a disorder that is characterized by the progressive death of dopaminergic neurons and that leads to motor and cognitive disorders. This neuronal loss is located in the area of union between the brain and the spinal cord, the brainstem, particularly in those neurons that are in a nucleus called substantia nigra and more specifically, in a portion of this nucleus that is called the compact part. Dopamine is an amino acid that, in the brain, acts as a neurotransmitter, that is, it is capable of transporting information from one group of neurons to another through chemical and electrical mechanisms. Dopamine is responsible for transmitting information from the substantia nigra to other areas of the brain that form a connection circuit to each other. As a consequence of the degeneration of the substantia nigra, dopamine levels decrease, appearing the characteristic disorders of the disease, as the deterioration of movement.

the titanic would be the correct answer

d. organisms have cells with different shapes and functions.