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Sense Organs - human anatomy
... They detect touch, pressure, stretch, heat, cold, and pain They also detect stimuli such as blood pressure and blood chemistry, which we do not perceive consciously Special senses employ relatively complex sense organs of the head, innervated by cranial nerves. They include vision, hearing, ...
... They detect touch, pressure, stretch, heat, cold, and pain They also detect stimuli such as blood pressure and blood chemistry, which we do not perceive consciously Special senses employ relatively complex sense organs of the head, innervated by cranial nerves. They include vision, hearing, ...
The Nervous System
... • A nerve cell or neuron is: a specialized cell that uses electrical signals to communicate with other cells • An impulse is: an electrical signal travelling through a neuron • A nerve is: a bundle of neurons • Sensory neurons: carry impulses from receptors (e.g. in skin) to the central nervous syst ...
... • A nerve cell or neuron is: a specialized cell that uses electrical signals to communicate with other cells • An impulse is: an electrical signal travelling through a neuron • A nerve is: a bundle of neurons • Sensory neurons: carry impulses from receptors (e.g. in skin) to the central nervous syst ...
Diapositive 1
... of endocannabinoid molecules from membrane lipidss. Characteristics of endocannabinoid: 1. They are not packaged in vesicles like most other neurotransmitters; instead, they are manufactured rapidly and on-demand. 2. 2. They are small and membrane pecrneable; once synthesized, they can diffuse rapid ...
... of endocannabinoid molecules from membrane lipidss. Characteristics of endocannabinoid: 1. They are not packaged in vesicles like most other neurotransmitters; instead, they are manufactured rapidly and on-demand. 2. 2. They are small and membrane pecrneable; once synthesized, they can diffuse rapid ...
Neuron and Neuroglial Review Worksheet
... B. Match the anatomical terms given in Column B with the appropriate descriptions of function provided in Column A. Place the correct term or letter response in the answer blanks. Column A 1. Releases neurotransmitters ____B_____ 2. Conducts electrical currents ___C_____ towards the cell body 3. Inc ...
... B. Match the anatomical terms given in Column B with the appropriate descriptions of function provided in Column A. Place the correct term or letter response in the answer blanks. Column A 1. Releases neurotransmitters ____B_____ 2. Conducts electrical currents ___C_____ towards the cell body 3. Inc ...
The Nervous System
... Neural Communication at Synapses • When the action potential reaches the axonal endings, the axon terminals release chemicals called neurotransmitters • These neurotransmitters diffuses across the synapse and bind to receptors on the membrane of the next neuron • If enough neurotransmitter is relea ...
... Neural Communication at Synapses • When the action potential reaches the axonal endings, the axon terminals release chemicals called neurotransmitters • These neurotransmitters diffuses across the synapse and bind to receptors on the membrane of the next neuron • If enough neurotransmitter is relea ...
Learning Objectives
... Explain the mechanism of action of acetylcholine in modulating muscle contraction. Give the receptors through which these neurotransmitters carry out these functions. ...
... Explain the mechanism of action of acetylcholine in modulating muscle contraction. Give the receptors through which these neurotransmitters carry out these functions. ...
Chapter 7
... Consists of the vestibular sacs (respond to the force of gravity and inform the brain about the head’s orientation) and the semicircular canals (respond to angular acceleration, i.e. changes in head rotation, but not to steady acceleration) The functions include balance, maintenance of the head in a ...
... Consists of the vestibular sacs (respond to the force of gravity and inform the brain about the head’s orientation) and the semicircular canals (respond to angular acceleration, i.e. changes in head rotation, but not to steady acceleration) The functions include balance, maintenance of the head in a ...
Methods and Ethics of Psychology
... Temporal code - cochlea registers low frequencies via firing rate in auditory nerve ...
... Temporal code - cochlea registers low frequencies via firing rate in auditory nerve ...
specimen jar craft - National Wildlife Federation
... The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals—only a few invertebrates such as sponges, jellyfish, adult sea squirts and starfish do not have a brain, even if diffuse neural tissue is present. It is located in the head, usually ...
... The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals—only a few invertebrates such as sponges, jellyfish, adult sea squirts and starfish do not have a brain, even if diffuse neural tissue is present. It is located in the head, usually ...
Document
... Neurons can fire action potentials repetitively at frequencies up to 200 pulses/sec There are 10 billion neurons in the human nervous system ...
... Neurons can fire action potentials repetitively at frequencies up to 200 pulses/sec There are 10 billion neurons in the human nervous system ...
The Special Senses
... the mucus of the epithelium • Olfactory neurons pass through the roof of the nasal cavity and synapse in the olfactory bulb • Olfactory tracts go directly to the cerebral cortex ...
... the mucus of the epithelium • Olfactory neurons pass through the roof of the nasal cavity and synapse in the olfactory bulb • Olfactory tracts go directly to the cerebral cortex ...
2.2 Electrical Communication Study Guide by Hisrich
... 2.2 Electrical Communication Study Guide by Hisrich 2.2.a How does communication happen within the body? Electrical Signals Nervous System ...
... 2.2 Electrical Communication Study Guide by Hisrich 2.2.a How does communication happen within the body? Electrical Signals Nervous System ...
Nervous Tissue: Support Cells
... between neurons to occur, an electrical impulse must travel down an axon to the synaptic terminal. ...
... between neurons to occur, an electrical impulse must travel down an axon to the synaptic terminal. ...
Unit B6 Key Words
... A reaction of the muscles in the pupil to light. The pupil contracts in bright light and relaxes in dim light A chemical messenger secreted by gland that brings about a slow change in the body A change in the environment that causes a response Cells that detect changes in the environment The long ti ...
... A reaction of the muscles in the pupil to light. The pupil contracts in bright light and relaxes in dim light A chemical messenger secreted by gland that brings about a slow change in the body A change in the environment that causes a response Cells that detect changes in the environment The long ti ...
What is the structure of the neuron? (continued)
... than neurons. • Surround and support neurons, control the supply of nutrients to neurons, assist in the exchange of chemicals between neurons, destroy and remove damaged neurons. ...
... than neurons. • Surround and support neurons, control the supply of nutrients to neurons, assist in the exchange of chemicals between neurons, destroy and remove damaged neurons. ...
Chapter 2 (The Brain) Study Guide 1. What is a neuron? What are
... between a neuron with myelin compared to a neuron that is not myelinated? 2. What is stimulus threshold? All-or-none principle? (domino example in class) 3. What is a synapse? 4. Effects of dopamine? Serotonin? Endorphins? Acetylcholine? 5. Know each of the parts of the brain and their functions. 6. ...
... between a neuron with myelin compared to a neuron that is not myelinated? 2. What is stimulus threshold? All-or-none principle? (domino example in class) 3. What is a synapse? 4. Effects of dopamine? Serotonin? Endorphins? Acetylcholine? 5. Know each of the parts of the brain and their functions. 6. ...
Summary of Chapter 7
... • The nervous system receives, processes, stores and transmits information from both inside and outside the body (p. 203). • A neuron is a specialized nerve cell in the nervous system that receives and transmits messages (p. 203). ...
... • The nervous system receives, processes, stores and transmits information from both inside and outside the body (p. 203). • A neuron is a specialized nerve cell in the nervous system that receives and transmits messages (p. 203). ...
The master controlling and communicating system of the body Functions
... o Depolarization – the inside of the membrane becomes less negative o Repolarization – the membrane returns to its resting membrane ...
... o Depolarization – the inside of the membrane becomes less negative o Repolarization – the membrane returns to its resting membrane ...
Chapter 12 - FacultyWeb
... Both require a rapid succession of stimuli at a single synapse. Both are methods by which individual EPSPs combine to result in an action potential. Both occur when simultaneous stimuli are applied at different locations, causing a cumulative effect on ...
... Both require a rapid succession of stimuli at a single synapse. Both are methods by which individual EPSPs combine to result in an action potential. Both occur when simultaneous stimuli are applied at different locations, causing a cumulative effect on ...
Stimulus (physiology)
In physiology, a stimulus (plural stimuli) is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity. When a stimulus is applied to a sensory receptor, it normally elicits or influences a reflex via stimulus transduction. These sensory receptors can receive information from outside the body, as in touch receptors found in the skin or light receptors in the eye, as well as from inside the body, as in chemoreceptors and mechanorceptors. An internal stimulus is often the first component of a homeostatic control system. External stimuli are capable of producing systemic responses throughout the body, as in the fight-or-flight response. In order for a stimulus to be detected with high probability, its level must exceed the absolute threshold; if a signal does reach threshold, the information is transmitted to the central nervous system (CNS), where it is integrated and a decision on how to react is made. Although stimuli commonly cause the body to respond, it is the CNS that finally determines whether a signal causes a reaction or not.