Nervous System Figure 38 2 Eyespot Brain Nerve

Nervous System

Figure 38. 2 Eyespot Brain Nerve cords Nerve net Transverse nerve (a) Hydra (cnidarian) (b) Planarian (flatworm) Brain Ventral nerve cord Spinal cord (dorsal nerve cord) Sensory ganglia Segmental ganglia (c) Insect (arthropod) © 2014 Pearson Education, Inc. (d) Salamander (vertebrate)

Figure 38. 4 Central nervous system (CNS) Brain Spinal cord Peripheral nervous system (PNS) Cranial nerves Ganglia outside CNS Spinal nerves

Presynaptic cell Axon Postsynaptic cell Synaptic vesicle Containing ____ 1 ____ Postsynaptic membrane Presynaptic membrane 3 K 4 Ca 2 2 __________________ Na

Presynaptic cell Axon Hw q #8 Postsynaptic cell Synaptic vesicle containing neurotransmitter 1 Synaptic cleft Postsynaptic membrane Presynaptic membrane 3 K 4 Ca 2 2 Voltage-gated Ca 2 channel Ligand-gated ion channels Na

Table 37. 2

• https: //www. youtube. com/watch? v=myh 5 Wj GTc 8 U • https: //www. youtube. com/watch? v=zc. Bm. MP Jrr. Kk • https: //nxr. northwestern. edu/research/mech anics-whiskers • https: //www. youtube. com/watch? v=w. Yxiff. T 7 i z. Y

• https: //www. youtube. com/watch? v=l. SBa. RPY DHMQ • https: //www. youtube. com/watch? v=Ibzfwtdt ong • http: //www. anatomieamsterdam. nl/sub_sites/anatomiezenuwwerking/123_neuro/html_pages/extern al_views/complete_brain_dorsal_view_nl. htm