*will mark brainliest* sexually transmitted diseases (stds) are infectious diseases spread during sexual contact. stds include gonorrhea and syphilis. stds include genital herpes and hiv (human immunodeficiency virus).

Aperson who doesn't have enough calcium in his or her diet is at risk for developing bones that are weak and break easily. this condition is known as  a.  osteoporosis.    b.  crohn's disease.    c.  celiac disease.    d.  hemophilia.

The amount of oxygen that is actually used by the body during the rest or a hand workout is determined by the heart rate, the stroke volume, and the amount of a. blood circulating in the vascular system b. oxygen removed from the vascular system c. oxygen provided to the vascular system d. blood that individual has in the body e. hemoglobin in the red blood cells

True or false. bulimia can begin with a weight-loss diet.