Question

True or False:
1. the NERVOUS system transports oxygen, nutrients, and other substances around the body.
2. after the av node produces impulses, blood flows into the VENTRICLES, which contract.
3. when a dancer stands on her toes, her contracting muscles relax the VEINS that run through them.
4. when the leg muscle contracts, blood into the veins is pushed AWAY FROM the heart.
5. when your body is exposed to the bacteria that cause strep throat, B LYMPHOCYTES produce antibodies that fight the infection.
6. lymph vessels have PUMPS that prevent lymph from flowing backward.

Answer 1

1.F

Answer 2

2T

Answer 3

3.T

Answer 4

4F
5T
6F