On this one, the choices are the same for each of the drop down options to choos

Question

On this one, the choices are the same for each of the drop down options to choose from.

Match each of the following types of heat transfer with their correct description as a skeletal muscle begins contracting and producing a lot of heat: Convection Choose ] Movement of heat from inside the skeletal muscle cell to the extracellular fluid Movement of heat from the extracellular fluid into the blood Movement of heat from the blood into the working skeletal muscle Likely does not occur as there would be some kind of medium for conduction or convection Conduction Radiation Choose]

Explanation / Answer

This question essentially deals with the mechanism of heat transfer as we study in physics or chemistry but what we have a twist in this question is to consider the anatomical details of skeletal muscle and relate it with the modes of heat transfer.

Let us first discuss a little about modes of heat transfer:

Now coming to the solution of this question after considering the basic modes of heat transfer and applying to heat transfer-

Convection - Movement of heat from the blood into the working skeletal muscle.

> This option best suits the mode of heat transfer via movement of molecules. Here we consider blood as a fluid (neglecting the cellular fraction) and it quickly removes the heat from the actively metabolizing muscle tissue and carries it away from it.

Conduction - Movement of heat from inside the skeletal muscle cell to the extracellular fluid.

> In this option, a solid-liquid interacting surface is considered. The solid surface being skeletal muscle membrane - the sarcolemma which is in contact with the first layer of extracellular fluid is considered as a static layer and because of adhesion at microscopic level resembles more or less an organized molecular layer which can facilitate conveying heat by molecular interactions.

Radiation - Likely does not occur as there would be some kind of medium for conduction or convection.

> This mode of heat transfer is not considered in the context of skeletal muscle as we would have muscle cell matrix and extracellular fluid, blood, lymph, and intracellular fluid which affords to provide some kind of medium to transfer heat. We cannot expect a complete vacuum or void in a human body, in any way.

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