Chapter 16 The Autonomic Nervous System Sympathetic (Thoraco-lumbar) division Parasympathetic (Cranial-sacral) division Somatic Motor vs Visceral Motor ■ ■ ■ ■ Somatic motor is directed from cortical levels to skeletal muscles and is voluntary. Visceral motor is directed from hypothalamus and midbrain and is involuntary‚ but has input from cortex and thalamus. Somatic lower motor neuron is in ventral horn of gray matter and neurotransmitter at skeletal muscle is Ach. Visceral motor comes from
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When substances like acetylcholine and norepinephrine are released in the body‚ they tend to bind to receptors‚ tissues and neurons. These neurotransmitters transfer signals throughout the nervous system and stimulates action potentials in the postganglionic neurons. Receptors found on the ANS and PNS includes the cholinergic receptors‚ which consists of all sympathetic and parasympathetic preganglionic‚ sympathetic postganglionic and all parasympathetic postganglionic neurons. The cholinergic receptors
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The nervous system is one of the smallest yet one of the‚ if not the most‚ complex systems in the human body. It can be broken down into two main subdivisions‚ the central nervous system (CNS) and the peripheral nervous system (PNS). The central nervous system contains about 85 billion neurons and includes the spinal cord and brain. It is considered the control center of the body and processes all types of incoming sensory information. The peripheral nervous system is composed of all the other tissue
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referred to as an effector organ because (A) the pupil constricts in the presence of bright light (B) the rods and cones are stimulated by light (C) images which fall on the retina are sent to the brain (D) neurons from the eye lead to the central nervous system Item 7 refers to the following diagram of the eye. 7. Which of the labeled parts contains cells called rods and cones? (A) I (B) II (C) III (D) IV 8. Andrea leaves a brightly lit area and ventures into a dark closet. Which of
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1. Explain both the anatomical and functional divisions of the nervous system. Include the subdivisions of each. The nervous system’s function is to monitor stimuli occurring inside and outside the body‚ process and interpret this sensory input‚ and respond by activating effector organs. It consists of the Central Nervous System (brain and spinal cord)‚ and the Peripheral Nervous System (neurons that carry messages to and from the CNS). 2. Describe the composition and function of the cell
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The central nervous system (CNS) is that portion of the vertebrae nervous system that is composed of the brain and spinal cord. Together with the peripheral nervous system (PNS)‚ the other major portion of the nervous system‚ the CNS coordinates the body’s interaction with the environment. The CNS is contained within the dorsal cavity‚ with the brain in the cranial subcavity (the skull)‚ and the spinal cord in the spinal cavity (within the vertebral column). Then human nervous system is the most
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Emily Muñoz 1/7 period Nervous System The nervous system consist of all the nerves the body has. Controlling not only the actions the body takes but the emotions a human being feels. The spinal cord‚ brain‚ and many nerves revolve around the nervous system. There are three overlapping functions that use millions of sensory receptors‚ that monitor the body. By monitoring the body the functions detect any changes the human body has had.Two components separate the nervous system allowing us to focus
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The human condition encompasses both ends of the spectrum when it comes to the human emotions - being misery as well as happiness. The quote "The Human Condition involves both misery and happiness" is an accurate sketch of what I have understood from the human condition thus far in reading The Crucible by Arthur Miller and the photo Bondi by Marco Bok. The Crucible is a play that portrays misery of the human condition through the use of its characters which generalise ’humans’ and the intense dialogue
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Autonomic nervous system The autonomic nervous system (ANS or visceral nervous system) is the part of the peripheral nervous system that acts as a control system functioning largely below the level of consciousness‚ and controls visceral functions. The ANS affects heart rate‚ digestion‚ respiration rate‚ salivation‚ perspiration‚ diameter of the pupils‚ micturition (urination)‚ and sexual arousal. Whereas most of its actions are involuntary‚ some‚ such as breathing‚ work in tandem with the conscious
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NERVOUS SYSTEM STUDY GUIDE 1. 3 FUNCTIONS OF NERVOUS SYSTEM 2. 2 MAJOR NERVOUS SYSTEMS 3. AFFERENT VS. EFFERENT NERVES. What does each do? 4. SOMATIC VS AUTONOMIC NERVOUS SYSTEM What does each do? Which is involuntary? 5. SYMPATHETIC VS PARASYMPATHETIC What are some things that happen when you get scared? When you have just had a big meal? 6. Draw the Graphic Organizer for the nervous system 7. ANATOMY
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