What two proteins are found on actin filaments?

Which of the follow is good way to gauge musculature endurance?

Charlie has been having nightmares of late. he always thinks that there is an evil dragon waiting to pounce on him. what age is charlie most likely to be? a. one year old b. three years old c. seven years old d. nine years old

Which disease is a risk for people who don't consume enough iron rich foods? a. bulimia b. heart disease c. anemia d. anorexia