Psych 9A. Lec. 05 PP Slides: Brain and Nervous System
... • These cells have many functions, both during development and in supporting the function of the mature nervous system. • They may also constitute a separate, slow signal system. • Oligodendrocytes: produce myelin sheaths for neuron axons (white ...
... • These cells have many functions, both during development and in supporting the function of the mature nervous system. • They may also constitute a separate, slow signal system. • Oligodendrocytes: produce myelin sheaths for neuron axons (white ...
Nerve Impulses - Tamalpais Union High School District
... axons to speed up their responses. This explains why squid have their giant axons. • Myelin sheath - Only vertebrates have a myelin sheath surrounding their neurons. The voltage-gated ion channels are found only at the nodes of Ranvier, and between nodes myelin sheath acts as a good electrical insul ...
... axons to speed up their responses. This explains why squid have their giant axons. • Myelin sheath - Only vertebrates have a myelin sheath surrounding their neurons. The voltage-gated ion channels are found only at the nodes of Ranvier, and between nodes myelin sheath acts as a good electrical insul ...
2016-2017_1stSemester_Exam2_180117_final
... The most abundant neurotransmitter in the brain is the _________________________________________ . It is a building block of all proteins, but a high affinity transport system is required to get it through the ____ _____________________________________, thereby its concentration in brain fluids is a ...
... The most abundant neurotransmitter in the brain is the _________________________________________ . It is a building block of all proteins, but a high affinity transport system is required to get it through the ____ _____________________________________, thereby its concentration in brain fluids is a ...
3.E.2 Nervous System - kromko
... 4. The membrane hyperpolarizes (becomes more negative than resting potential). During this period of recovery, called the refractory period, the nerve cell cannot be stimulated again. The sodium-potassium pump returns the membrane potential to -70 mV. ...
... 4. The membrane hyperpolarizes (becomes more negative than resting potential). During this period of recovery, called the refractory period, the nerve cell cannot be stimulated again. The sodium-potassium pump returns the membrane potential to -70 mV. ...
Brains, Synapses and Neurotransmitters
... Behaviour, so, we had better know how the nervous system works The nervous system is made up, basically, of two types of cells • Neurons ...
... Behaviour, so, we had better know how the nervous system works The nervous system is made up, basically, of two types of cells • Neurons ...
Notes – Neurons and the nervous system
... At rest, the fluid inside a neuron has an excess of negatively charged ions. i.e. a negative resting potential When a neuron is in its resting state, sodium channels are blocked, thus keeping excess positive ions out of the cell. When a nearby neuron fires an action potential, this triggers so ...
... At rest, the fluid inside a neuron has an excess of negatively charged ions. i.e. a negative resting potential When a neuron is in its resting state, sodium channels are blocked, thus keeping excess positive ions out of the cell. When a nearby neuron fires an action potential, this triggers so ...
Transmission at the Synapse and the
... excitatory synapse on another neuron, and the two nerve endings form an axoaxonal synapse. o There are 3 mechanisms of presynaptic inhibition: Activation of chloride channels in the PRE-synaptic neuron – that hyperpolarizes the excitatory nerve ending and thus reduced the magnitude of excitatory a ...
... excitatory synapse on another neuron, and the two nerve endings form an axoaxonal synapse. o There are 3 mechanisms of presynaptic inhibition: Activation of chloride channels in the PRE-synaptic neuron – that hyperpolarizes the excitatory nerve ending and thus reduced the magnitude of excitatory a ...
The Nervous System - chemistrywithmrsmorton
... Vision, hearing, equilibrium, taste, smell, pain, pressure, heat ...
... Vision, hearing, equilibrium, taste, smell, pain, pressure, heat ...
14.1 Nervous Control notes - Mr Cartlidge`s Saigon Science Blog
... Relay neurons are found in the spinal cord, connecting sensory neurons to motor neurons; Neurons do not connect directly with each other: there is a gap called a synapse. The sequence of events is Stimulus (sharp pin in finger) Receptor (pain receptors in skin) Coordinator (spinal cord) Effect ...
... Relay neurons are found in the spinal cord, connecting sensory neurons to motor neurons; Neurons do not connect directly with each other: there is a gap called a synapse. The sequence of events is Stimulus (sharp pin in finger) Receptor (pain receptors in skin) Coordinator (spinal cord) Effect ...
20-NervousSystem
... membrane of a resting neuron is generated by different concentrations of Na+, K+, and Cl ...
... membrane of a resting neuron is generated by different concentrations of Na+, K+, and Cl ...
The Nervous System : communication
... inhalation, swallowing or absorption through eyes or mouth Strychnine is a neurotoxin which acts as an antagonist of acetylcholine receptors. It primarily affects the motor nerves in the spinal cord which control muscle contraction. An impulse is triggered at one end of a nerve by the binding of neu ...
... inhalation, swallowing or absorption through eyes or mouth Strychnine is a neurotoxin which acts as an antagonist of acetylcholine receptors. It primarily affects the motor nerves in the spinal cord which control muscle contraction. An impulse is triggered at one end of a nerve by the binding of neu ...
Ch 09 Nervous System
... inhalation, swallowing or absorption through eyes or mouth Strychnine is a neurotoxin which acts as an antagonist of acetylcholine receptors. It primarily affects the motor nerves in the spinal cord which control muscle contraction. An impulse is triggered at one end of a nerve by the binding of neu ...
... inhalation, swallowing or absorption through eyes or mouth Strychnine is a neurotoxin which acts as an antagonist of acetylcholine receptors. It primarily affects the motor nerves in the spinal cord which control muscle contraction. An impulse is triggered at one end of a nerve by the binding of neu ...
Neural Pathways and Transmission
... This means that charged particles, called ions, line the membrane of the neuron, causing a difference in charge across the membrane Potassium and sodium ions line the membrane in unequal distribution to cause a positive exterior and a negatively charged interior Potassium (K+) is concentrated on the ...
... This means that charged particles, called ions, line the membrane of the neuron, causing a difference in charge across the membrane Potassium and sodium ions line the membrane in unequal distribution to cause a positive exterior and a negatively charged interior Potassium (K+) is concentrated on the ...
The Nervous System - Riverside Preparatory High School
... Vision, hearing, equilibrium, taste, smell, pain, pressure, heat ...
... Vision, hearing, equilibrium, taste, smell, pain, pressure, heat ...
Notes - The Nervous System
... 3. Nerve impulses pass to interneurons in the brain. 4. The interneurons interpret the nerve impulses and decide on a response, you should answer the phone. 5. Impulses travel along motor neurons to the ...
... 3. Nerve impulses pass to interneurons in the brain. 4. The interneurons interpret the nerve impulses and decide on a response, you should answer the phone. 5. Impulses travel along motor neurons to the ...
The Nervous System
... Synapse—the site of contact between an axon and a target cell Neurotransmitter—chemical messengers that relay messages across the synapse ...
... Synapse—the site of contact between an axon and a target cell Neurotransmitter—chemical messengers that relay messages across the synapse ...
STUDY GUIDE CHAPTERS 48 and 50 THE NERVOUS SYSTEM
... 1. Draw the graph in the center. 2. Inspect the drawing that goes with each label, and write the caption for each label. Trust me, this is important!! CONCEPT 48.4 NEURONS COMMUNICATE WITH OTHER CELLS AT SYNAPSES F. Figure 48.15 A Chemical Synapse. Look at the picture and write the 4 events that occ ...
... 1. Draw the graph in the center. 2. Inspect the drawing that goes with each label, and write the caption for each label. Trust me, this is important!! CONCEPT 48.4 NEURONS COMMUNICATE WITH OTHER CELLS AT SYNAPSES F. Figure 48.15 A Chemical Synapse. Look at the picture and write the 4 events that occ ...
Senses powerpoint
... A. All sensory receptors are transducers of some sort, that is, they change an incoming stimulus of pressure, vibration, light, etc., into electro-chemical neuron impulses. Each is specific in that it can transduce only certain types of stimuli into neuron action potentials. B. Perception - consciou ...
... A. All sensory receptors are transducers of some sort, that is, they change an incoming stimulus of pressure, vibration, light, etc., into electro-chemical neuron impulses. Each is specific in that it can transduce only certain types of stimuli into neuron action potentials. B. Perception - consciou ...
9-18-04 Nervous System Peripheral No1
... – All ganglionic transmission is cholinergic (acetylcholine) • Drugs that block ganglionic transmission block either parasympathetic or sympathetic depending on which is active • This is a paradox many have a problem grasping ...
... – All ganglionic transmission is cholinergic (acetylcholine) • Drugs that block ganglionic transmission block either parasympathetic or sympathetic depending on which is active • This is a paradox many have a problem grasping ...
sensory receptors, neuronal circuits for processing information
... senses are the nervous mechanisms that collect sensory information from all over the body. ...
... senses are the nervous mechanisms that collect sensory information from all over the body. ...
Nervous System (1)
... 1. Stimulus - a change in an organism’s internal or external environment that initiates a response. 2. Receptors - structures specialized in detecting stimuli Ex. sense organs - eye, ear, nose, tongue, skin. 3. Effectors - organs that produce responses to stimuli Ex. muscles or glands ...
... 1. Stimulus - a change in an organism’s internal or external environment that initiates a response. 2. Receptors - structures specialized in detecting stimuli Ex. sense organs - eye, ear, nose, tongue, skin. 3. Effectors - organs that produce responses to stimuli Ex. muscles or glands ...
6.2 Transmission of Nerve Impulses
... 1. A neuron at rest has more sodium ions (Na+) outside the membrane than potassium (K+) ions inside, therefore there is a more negative charge inside the neuron - The neuron is said to be polarized 2. If stimulus is received it must reach a critical voltage before it will have an effect on the neuro ...
... 1. A neuron at rest has more sodium ions (Na+) outside the membrane than potassium (K+) ions inside, therefore there is a more negative charge inside the neuron - The neuron is said to be polarized 2. If stimulus is received it must reach a critical voltage before it will have an effect on the neuro ...
Nervous System Ch 10 Notes - Reading Community Schools
... threshold intensity or above is applied to an axon • All impulses carried on an axon are the same strength ...
... threshold intensity or above is applied to an axon • All impulses carried on an axon are the same strength ...
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.