what are the definitions of the following. 1)peripheral nerve 2) cranial 3)spinal nerve 4) nerve plexus 5)autonomic nervous system 6) sympathetic nervous system 7) parasympathetic nervous system 8) fascicle 9)axon 10) epinerium 11) perinerium 12) endonerium
3. The axon of a nerve cell carries signals toward the part of the cell that houses the nucleus.(T or F)
4. When you are nervous you notice that your mouth is dry and your heart is racing. This is caused by the sympathetic division of your autonomic nervous system.(T or F)
5. The PNS consists of the somatic nervous system which controls smooth muscles etc. and the autonomic nervous system which sends messages to the skeletal muscles. (T or F)
6. When you do not have 20/20 vision and wear contact lenses or eye glasses, they work to improve your sight because they bend the light rays to correct your vision. (T or F)
7. All of the following are examples of a general category of sensory receptors: thermoreceptors, mechanoreceptors, electromagnetic receptors, chemoreceptors, and auditory receptors.(T or F)
8. If an animal is diurnal (active during the day) it probably has more cones in its eyes to distinguish more colors because its prey may have evolved to be camouflaged in the daylight.(T or F)
9. If you could not move the muscles in your eye, you would still expect that you could focus on different objects at different distances.(T or F)
10. If you had a pet spider and looked him lovingly in the eye you would see that he has a compound eye rather than a single lens like you would find in your own eye. (T or F)
