112DT Nervous system Part 1 0.0 / 5 ? BiologyNervous SystemUniversityAll boards Created by: EllenCreated on: 27-03-14 16:29 Name 3 of the 7 structures of the Nervous system Brain; Cranial Nerves; Spinal Cord; Spinal Nerves; Ganglia; Enteric Plexus; Sensory Receptors 1 of 31 How many cranial nerves does the brain have? 12 2 of 31 How many spinal nerve pairs does the spinal cord have? 31 3 of 31 Which structure of the nervous system forms a connection between the Central Nervous System (CNS) and the Peripheral Nervous System (PNS)? Ganglia 4 of 31 Enteric Plexus is a network of neurons that serves the Gut 5 of 31 Dendrites of sensory neurones are known as Sensory receptors 6 of 31 Picture Picture 7 of 31 CNS is made up of which part of the body Brain and spinal cord 8 of 31 Spinal cord connects the brain to which nervous system Peripheral Nervous System (PNS) 9 of 31 White matter denotes the presence of Mylinated AXONS 10 of 31 Grey matter denotes the presence of Unmylinated CELL BODIES 11 of 31 What are the 3 functions of the nervous systems? Sensory, Motor and Integrative (relay) 12 of 31 The 3 sensory functions are? Detection of internal stimuli; external stimuli; messages carried to brain or spinal cord 13 of 31 The 3 Integrative (Relay) functions are? Process sensory information; Stores information and decides response; Awareness of sensory stimuli in the brain 14 of 31 The 2 motor functions are Produce a response; Activates effectors i.e: muscles contract, glands secrete 15 of 31 What are the 3 main catergories of sensory receptors Mechanoreceptors (stretch, contraction); Chemoreceptors (taste, smell, monitor H+ O2 CO2); Radioreceptors (sight; temperature) 16 of 31 4 things sensory receptors can detect? Vibrations; Pressure; Temperature; Chemical Substances 17 of 31 Some nerves are linked to surrounding tissues. If these nerves are damaged the around it will still function well. TRUE or FALSE FALSE 18 of 31 Where are the very short neurones located? Brain 19 of 31 How long can a neurone be? 1.5m 20 of 31 Do ALL neurones contain the usual cell organelles? Yes 21 of 31 Which cells produce the insulating fatty layer or myelin? The Schwann cells 22 of 31 Picture Picture 23 of 31 Do afferent neurones have sensory, motor or integrative functions Sensory 24 of 31 Do efferent neurones have sensory, motor or integrative functions Motor 25 of 31 Afferent neurons have the cell body proturding from the middle of the neurone. TRUE or FALSE TRUE 26 of 31 Are the signals to the brain carried by the afferent or the efferent neurones Afferent 27 of 31 Are the signals from the brain or spinal cord to the tissues afferent or efferent? Efferent 28 of 31 Is it afferent or efferent neurones that alter tissue functions? Efferent 29 of 31 What are the 3 subdivisions of the PNS? Somatic NS; Autonomic NS; Enteric NS 30 of 31 Will the parasympathetic NS increase or decrease the heart rate? Decrease 31 of 31
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