The answers that fit the given blanks above are EXTENSOR and FLEXOR, respectively. Extensor muscles are those muscles that contract once extended and flexor muscles are those muscles that contract once flexed. When you extend, you move the limb away from the trunk; and when you flex, you are moving it toward the trunk.
Answer:B..7 to the right
Explanation:
10-3=7N
Greater force of 10 means the book will move to the right.
In mammals urine is expelled through the urethra which is part of the excretory system in unicellular organisms waste products are discharged directly through the surface of the cell
