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Tutor profile: Bismarck B.

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Bismarck B.
4 years university teacher's assistant for physiology, biochemistry and pharmacology, School of Medicine. Medical Doctor currently resident
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Questions

Subject: Health and Medicine

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Question:

Why vitamins are important in the body?

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Bismarck B.
Answer:

Vitamins are biological compounds essential for the body function, meaning that human body does not have the capacity to produce them and we need to consume them from outsource (diet). Function depends on the specific vitamin that we're talking about. Most of them are necessary to the correct function of enzymes, such as B1, necessary for glycolysis, TCA cycle and HMP shunt enzymes function. Also, others are essential for synthesis of other biological compounds, B6 is essential in the heme group synthesis and RBC's generation in the bone marrow. If B6 is deficient, there will be a decrease in RBC mass due to lack of heme group building on the bone marrow, this is very important in patient being treated for tuberculosis with drugs such as Isoniazid, which decreases total amount of B6 in the body.

Subject: Medicine

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Question:

Whats the function of cell membrane?

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Bismarck B.
Answer:

Cell membrane is a bilayer of phospholipids and proteins. This layer allows the cell be "isolated" from the extracellular space and creates a semi-compartment. This compartment is not totally isolated because lets some communications/transport between inner cell and media. Function of cell membrane are wide and complex. Among them, create an ionic difference between extracellular space and intracellular space. This is for the cell to hace a membrane potential and the ability of have an actual action potential in the case of excitable cells. Other function is interaction between EC space and IC space. Cell membrane is the main support for receptors and transporters, which allows the cellular signals from extracellular space direct actions to the cell and in that way, evoque some biological response (could be localized or spread, ex. hormones). ...

Subject: Biology

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Question:

How does the electron transport chain works in the cell?

Inactive
Bismarck B.
Answer:

The cell needs the electron transport chain to generate ATP energy and move all active transport and energy dependent enzymes/proteins in the body. Krebs cycle generate NADH and FADH2 which are high energy compounds. These compounds in the inner mitochondria space give electrons to complex 1 and 3 (NADH); and complex 2 (FADH2) to be transported to complex 4 and then generate H2O when accepted by Oxygen. At the same time, H+ are being transferred to inte-mitochondrial space creating a low pH there and a gradient to H+ being transported to inner mitochondrial space through Complex V or ATP synthase, generating ATP.

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