Answer:
ningún núcleo, primera célula en la tierra, ADN lineal, tiene ribosomas, tiene una membrana.
Explanation:
Answer:
Soil taxonomy is the system of soil classification used for mapping and classifying soils by the National Cooperative Soil Survey in the United States; it is used in many other countries as well. ... It employs a unique mnemonic system based on Greek, Latin, or other root words for assigning names to taxonomic classes
Answer:
They bring dissolved nutrients to the surface of the ocean. They decrease the levels of oxygen at the surface of the ocean. They decrease the amount of nutrients at the surface of the ocean.
Explanation:
Answer:
The correct option is: <em>a deficiency of dopamine in the substantia nigra.</em>
Explanation:
The substantia nigra is the principal site involved in the physiopathology of Parkinson´s disease.
Cells from this area degenerate and die progressively causing important degeneration in the central nervous system. The cells that die -with no known reason- are those that produce dopamine and proportionate dopaminergic innervation to the encephalon. In fact, almost all the symptoms exhibited by patients with the disease can be explained by the lack of dopamine in the substantia nigra.
This area uses the neurotransmitter to communicate neurons from the base ganglia. Ganglia are responsible of modulating and modifying movements.
The nigrostriatal system participates in planning and automatic execution of learned movements. When the ganglia activity decreases, so it does the amount and velocity of movements, something typical of the disease.
