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Alex17521 [72]
3 years ago
6

Meiosis can occur

Biology
1 answer:
bija089 [108]3 years ago
6 0

a is the answer pls mark brainliest

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Parkinson disease is associated with demyelination of CNS neurons. a pyramidal nerve tract lesion. insufficient production of ac
Pepsi [2]

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.  

3 0
2 years ago
What is an indicator that a chemical change has occurred?
Pachacha [2.7K]

Answer:

a change in energy

Explanation:

7 0
3 years ago
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What is one difference between monocot and dicot plants?
denis-greek [22]
Monocots only have one cotyledon (vein) dicots have two
7 0
3 years ago
Where would you find hemoglobin that is relatively o2 poor in a healthy resting person?.
sukhopar [10]

Answer:

Venous blood

Explanation:

Arterial blood is carrying oxygen to tissues.....after delivering the oxygen it is venous blood and has less oxygen.

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How are the platypus’s bill and feet specially adapted for survival in their environment? (Site 2)
lapo4ka [179]
Platypus is an Australian mammal that lives in deciduous forests. Platypus's bill is adapted in order to allow platypus to travell and find its way in the river without using vision. This adaptation is achieved through special receptors that sense touch and electricity. Platypus's feet are webbed, enabling them to swim fast and efficiently and move easily on muddy surfaces.
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