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Tutor profile: Ryan S.

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Ryan S.
PhD in Neuroscience
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Questions

Subject: Biomedical Science

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Question:

What monoaminergic neurotransmitter is mostly associated with reward, motivation, and movement?

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Ryan S.
Answer:

Dopamine is a monoamine which is critical for controlling reward, motivation, and movement. For example, when you eat or drink something pleasurable, this creates a surge of dopamine and reinforces this behavior. Additionally, movement and coordination is regulated by this neurotransmitter. Unfortunately, we also know that drugs of abuse can also use dopamine to reinforce their addictive properties. Lastly, Parkinson's disease is a neurodegenerative disease where neurons that produce dopamine die off and this produces tremors and loss of coordination.

Subject: Biology

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Question:

What is the endosymbiotic theory of evolution?

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Ryan S.
Answer:

In evolution, it is theorized that mitochondria were once bacteria that fused together with a primitive cell and formed a symbiotic relationship. The cell provides defense and nutrients. In return, the mitochondria produce energy (ATP) for the cell. Over time, these bacteria became mitochondria, the organelle colloquially referred to as "the powerhouse of the cell". Other evidence supporting this theory is the fact that mitochondria have their own DNA (mtDNA).

Subject: Algebra

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Question:

Which is larger: x+5 OR 2x-1?

Inactive
Ryan S.
Answer:

In order to solve this, we first have to solve for "x". So we set each equation equal to one another. x+5 = 2x-1 Then, we solve for x by first getting all the "x" onto one side x+5 = 2x-1 -x = -x 5 = x - 1 Then, we solve for x. 5 = x - 1 +1 = +1 6 = x We now plug this value for x back into the original equations x-5 OR 2x-1 (6)-5 OR 2(6)-1 1 OR 11 We now see that 2x-1 is greater than x+5.

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