Problem:OPTIONS:
- tubes
- Veins
- Aorta
- arteries

Answer the following question given this paragraph: Arteries are muscular blood vessels that carry blood away from the heart. They have thick walls that can withstand the pressure of blood pumped by the heart. Arteries generally carry oxygen-rich blood. The largest artery is the aorta, which receives blood directly from the heart. It branches to form smaller and smaller arteries throughout the body. The smallest arteries are called arterioles. Q: What is the name of muscular blood vessels that carry blood away from the heart? A:
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A: arteries

Problem:OPTIONS:
- lipids sheath
- nerve sheath
- layer sheath
- myelin sheath

Answer the following question given this paragraph: The axon of many neurons has an outer layer called a myelin sheath (see Figure above ). Myelin is a lipid produced by a type of a glial cell known as a Schwann cell. The myelin sheath acts like a layer of insulation, similar to the plastic that encases an electrical cord. Regularly spaced nodes, or gaps, in the myelin sheath allow nerve impulses to skip along the axon very rapidly. Q: What is the outer layer of an axon that acts like a layer of insulation, similar to the plastic that encases an electrical cord? A:
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A: myelin sheath

Problem:OPTIONS:
- the orbit
- the earth
- jupiter
- the sun

Answer the following question given this paragraph: The Sun is just an average star compared to other stars. But it is by far the largest object in the solar system. The Sun is more than 500 times the mass of everything else in the solar system combined! Listed below is data on the sizes of the Sun and planets relative to Earth ( Table below ). Q: What is the largest object in the solar system? A:
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A: the sun

Problem:OPTIONS:
- the vagina
- the cervix
- the ovaries
- the placenta

Answer the following question given this paragraph: The placenta permits a long period of fetal growth in the uterus. As a result, the fetus can become large and mature before birth. This increases its chances of surviving. Q: What allows for a large and mature fetus before birth, resulting from a long period of fetal growth in the uterus? A:
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A:
the placenta