Dar 2
3
4 points
3
Choose all that can be classified as matter.
Helium gas that fills a balloon
4
Air that you breath in
Electricity
5
Gravity
6
Water bottle
Sheet of paper
• 7
4
1 point

Which of the following would be a body response when stepping outside without a coat on a snowy day? a. senaceous glands. secrete more senum b. more liquid is transported by the body to the skin fir insulation c. blood vessels in the skin narrow and contract d. blood vessels in the skin expand

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food

In what part of the body does the most muscle activity happen?