Q: In humans, the anus is attached to what kind of intestine? Read this paragraph and choose the correct option from the provided answers: Anal Canal Finally, food residue reaches the last part of the large intestine, the anal canal, which is located in the perineum, completely outside of the abdominopelvic cavity. This 3.85 cm (1.52 in) long structure opens to the exterior of the body at the anus. The anal canal includes two sphincters. The internal anal sphincter is made of smooth muscle, and its contractions are involuntary. The external anal sphincter is made of skeletal muscle, which is under voluntary control. Except when defecating, both usually remain closed. Choices: - huge - internal - small - large A:
large

Q: What in the skin dilates, or widens, in order to increase blood flow to the bodys surface? Read this paragraph and choose the correct option from the provided answers: The skin helps maintain a constant body temperature. It keeps the body cool in two ways. Sweat from sweat glands in the skin evaporates to cool the body. Blood vessels in the skin dilate, or widen, increasing blood flow to the body surface. This allows more heat to reach the surface and radiate into the environment. The opposite happens to retain body heat. Blood vessels in the skin constrict, or narrow, decreasing blood flow to the body surface. This reduces the amount of heat that reaches the surface so less heat is lost to the environment. Choices: - veins - pores - tear ducts - blood vessels A:
blood vessels

Q: Compared to others, what type of liquid has a relatively high surface tension and heat capacity? Read this paragraph and choose the correct option from the provided answers: Compared to other liquids, water has a relatively high surface tension and heat capacity. Both of these properties are partially a result of the strong hydrogen bonds that hold water molecules together. Choices: - oil - wine - blood - water A:
water

Q: What is the most common type of capillary? Read this paragraph and choose the correct option from the provided answers: Continuous Capillaries The most common type of capillary, the continuous capillary, is found in almost all vascularized tissues. Continuous capillaries are characterized by a complete endothelial lining with tight junctions between endothelial cells. Although a tight junction is usually impermeable and only allows for the passage of water and ions, they are often incomplete in capillaries, leaving intercellular clefts that allow for exchange of water and other very small molecules between the blood plasma and. Choices: - channels - large - ending - continuous A:
continuous