Week 1 CSHR Activity Neurons and Glial Cells Problem #1- Neuroglia a. Color the following structures as follows: Body of neuron (blue) Oligodendrocyte (green) Capillary (red) Nodes of Ranvier (orange) Astrocyte (purple) Ependymal cells (yellow) Myelin Sheath (pink) Microglial cells (brown) A b. Identify the neuroglia that each statement is describing: Line the ventricles of the brain o Ependryrmal Form myelin of neurons in the CNS o Oligodendrocytes Engulf any bacteria and debris o Microglia Form myelin of neurons in the PNS o Schwan cells _ Bind neurons with blood vessels o Astrocytes (most abundant ) Problem #2- Neuron Structure and Function a. Color and label the different structures of a neuron. Label the direction of signal transduction through a neuron. Soma Nucleus Axon hillock Dendrites Axon Myelin Neurilemma Axon terminals Node of Ranvier Schwann cell b. Identify the structures of a neuron that each statement is describing: Process conducting impulses toward the cell body i. Dendrites Process conducting impulses from the cell body i. Axon Fatty insulation on some neuron processes i. Myelin Sheath Small spaces between myelin sheath i. Nodes of Ranvier Lines the axon (and myelin if present) i. Neurilemma Cell that provides fatty insulation for neuron i. Oligodendrocytes CNS and Schwann cells PNS Forms a junction with post-synaptic cell i. Axon terminal Problem #3- Nervous System Breakdown a. In the diagram below label the following structures: Central nervous system neuron (direction) Peripheral nervous system Association neuron Proprioceptors b. Answer the following questions regarding the nervous system: 1) The central nervous system consists of these two structures: - Brain, spinal cord 2) What does the peripheral nervous system consist of? - Everything else 3) Afferent means Arriving while efferent means Exciting. Afferent neuron (direction) Efferent Interoceptors Exteroceptors 4) Why are interneurons considered association neurons? - Control sensory and motor neurons 5) Anatomical directions: exteroceptors can be found External compared to the interoceptors which are more Internal. Problem #4- Functional Divisions of Nervous System a. Fill in the spaces below regarding the division of the nervous system. b. Answer the following questions about the nervous system: 1) Define somatic and autonomic. o Somatic; voluntary movement o Autonomic; involuntary movement - 2) Define sympathetic and parasympathetic. Sympathetic; excites the flight or fight response Parasympathetic; the Rest and Digest 3) What are effectors? - An organ response to stimulus o Glands and muscles 4) What division of the PNS do you have voluntary control over? Which types of muscle tissue are made for this? - Somatic Division o Skeletal o 3 main cardiac smooth 5) Which division of the PNS do you not have voluntary control over? Which types of muscle tissue are made for this? - Autonomic o Cardiac- smooth