What is true about all neurons?
a-they are bundled together in nerves that are surrounded by a protective sheath.
b-they all transmit signals through axons and receive neurotransmitters through dendrites.
c-they each bring nutrients to the brain and produce a fatty protective layer called myelin.
d-they all send signals from the brain to the body through long axons in the vertebral column

When you have proper posture, your back is arched. a. true b. false

Which method will provide the most emotional support in a new exercise program

Check all that occur during ventricular systole. a. the av valves open to allow blood to enter the ventricles from the atria. b. the av valves open to allow blood to enter the ventricles from the atria. c. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. d. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. e. the semilunar valves open to allow blood to flow into the large arteries. f. the semilunar valves open to allow blood to flow into the large arteries. g. the av valves close to prevent backflow of blood into the atria.