Question

13. Specialized nerve endings on sensory neurons that detect changes inside and outside the body are called ______________________. 14. Neurons that send impulses from the brain and spinal cord to other systems are called ______________________. NERVES _____ 15. Nerves do NOT contain a. muscle fiber. b. blood vessels. c. axons. d. connective tissue. 16. Nerves may contain the axons of both ______________________ and ______________________ neurons.

Answer 1

13. Specialized nerve endings on sensory neurons that detect changes inside and outside the body are called **receptors**.

14. Neurons that send impulses from the brain and spinal cord to other systems are called **motor neurons**.

15. Nerves do NOT contain **a. muscle fiber**.

16. Nerves may contain the axons of both **sensory** and **motor** neurons.