Based on Newton's second law, will walking be an effective way to build muscle? OA.
No, only lifting weights can build muscle effectively.
B.
Yes, there is a lot of resistance in walking, so it builds muscle.
O C.
No, walking does not elevate the heart rate, so it cannot build muscle.
OD.
No. It will be good exercise but not the most effective way to build muscle.

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.