What happens to your upper arm muscles when you bend your arm at the elbow to eat your favorite sandwich.

 Hello there,

I was going to say. . ." Who cares, Just eat the darn sandwich, if you love your favorite sandwich, who care what happens to your elbow's. But anyways the correct answer is the fulcrum in your arm levers the joints in your body. This causes there to be a friction between the two muscles, causing your elbow to properly bend.

Hope this helps.

~Twizzie

And a little 'humor' is fine,Right! :D

B. False

Explanation:

Hello,

In this case, we first should remember that endothermic reactions are those reactions absorbing energy while they undergo, for that reason it is false they do not give off energy. Moreover, law of conservation of energy must the respected as energy cannot be neither created nor destroyed but just changed, that is why the whole statement is false.

Best regards.