Andrew's exercise routine is generally weight lifting and sit-ups. While he can tell that he is building muscle, he feels like he is getting less flexible. Which is the BEST explanation for this?
A- he is not doing exercises that stretch the muscles.
B-building muscles insure that you have limited flexibility
C-he is not getting less flexible he is just more aware of his body
D-there is no connection between building muscles and being flexible

Which disease is caused by a buildup of plaque in blood ves

As you sit in the library with your friend studying for your weekly quiz on the integumentary system, you come upon an article about the hazards of prolonged exposure to the sun's rays. your curious nature leads you to research the subject further. you're fascinated to learn that minimal exposure to the sun allows you skin to manufacture vitamin d, which is important to maintain homeostasis. you also read that although sunscreen can protect you from the ultraviolet (uv) rays of the sun, some medications can actually increase a person's sensitivity to the sunlight.

What are reasons people use tobacco