Parkinson's is a progressive degenerative disorder in which neurons are affected in basal ganglia and substantia nigra of brain. These neurons are responsible for producing dopamine transmitter and in Parkinson's they start to die.
Loss of around 80% of dopamine results in the symptoms like Bradykinesia (slow movement, decreased blinking, drooling), stiffness, tremor, balance problem etc. Treatment is done by medication, brain stimulation surgery, exercise and diet.
Components of Plasma Membranes. The plasma membrane protects the cell from its external environment, mediates cellular transport, and transmits cellular signals.
That is the main difference between sexual and asexual reproduction. Sexual reproduction just means combining genetic material from two parents. Asexual reproduction produces offspring genetically identical to the one parent.
