Question

fill in the blanks dash facial muscles r used when we smile. than when we frown​

Answer 1

Answer:

Well there is no clear answer for this.

Explanation:

It is because it is still considered a myth that whwn we smile, more muscles are used. Scientist are still trying to find out if the myth is true or not. For now we can consider it as a myth.

For more info, checkout = http://www.sciencemadesimple.co.uk/curriculum-blogs/biology-blogs/muscles