Baseball The Nervous System 1 • What are the • What cells are two major the structural & divisions of the functional unit nervous system? of the nervous system? – Answer: Central & Peripheral – Answer: Neurons 2 • The central nervous system is composed of what organs? – Answer: Brain & Spinal Cord • What composes the peripheral nervous system? – Answer: Spinal and Cranial Nerves 3 • What are the specialized cells that aid neurons (by producing myelin & helping communication)? – Answer: Neuroglia • What part of the neuron is the “receptive surface”? – Answer: Dendrite 4 • Match the neuroglia with • Where is the nucleus located in it’s function. •Phagocytosis Microglia the neuron? •Support – Answer: Cell Body Oligodendrocyte •Form myelin like Astrocyte Schwann cells Ependymal •Form lining in ventricles 5 • Identify the area marked with an arrow in the picture to the right. – Answer: Corpus callosum 6 • Identify the area of the brain stem marked with an arrow in the picture to the right. – Answer: Pons 7 • Identify the area of the brain marked with an arrow in the picture to the right. – Answer: Cerebellum 8 • Identify the 4 lobes of the brain. – Answer: 1. Occiptal 2. Parietal 3. Frontal 4. Temporal 1 2 3 4 9 • What is the function of the corpus callosum? – Answer: connects right & left hemispheres of brain 10 • Name the lobe & match the function: – – – – Hearing Vision Concentration Understanding speech 1 2 Temporal:hearing Parietal: understanding speech 3 4 Frontal: concentration Occiptal: vision 11 • What part of neuron is indicated by the arrow? – Answer: Dendrite • What is the function of this portion of the neuron? – Answer: main receptive surface for electrical impulses 12 • What part of neuron is indicated by the arrow? – Answer: Axon • What is the function of this fiber? – Answer: it conducts impulses away from the cell body 13 • What do the tiny circles in the space represent? – Neurotransmitter • What is the name of the space between the 2 neurons? – Answer: Synapse 14 • What part of an action potential is illustrated by the red line? – Answer: Depolarization 15 • What is the name of the gaps between Schwann cells? – Answer: Nodes of Ranvier • Grey Matter or White Matter, which is myelinated? – Answer: White Matter 16 • Name that structure – Answer: Pituitary Gland 17 • Which area is the postsynapic neuron, which is presynapic? • What structure is located at the arrow? – Answer: Mitochondrion 18 • What part of an action potential is illustrated by the red line? – Answer: Repolarization 19 • What are the layers of the meninges from innermost to outermost. – Answer: Pia, Arachnoid, Dura • What area forms cerebrospinal fluid? – Answer: Choroid Plexus 20 • Between which • Which has a layers of the lower meninges is CSF conductivity for found? impulses, grey or white matter? – Answer: Arachnoid and Pia – Answer: Grey 21 • Name the type of • fast conduction when impulses jump from node to node (Ranvier) – Answer: Saltatory Where is the greatest concentration of Na+, inside or outside axon? – Answer: Outside 22 • What is happening during this phase? – Answer: Na+ rushes in 23 • What is happening during this part of the ap? – Answer: K+ rushing out 24