Neurons and synapses..
... A brief recovery period occurs during which the nerve cell membrane cannot be stimulated to carry impulses. This refractory period lasts a few thousandths of a second. The rate at which an impulse travels depends on the size of the nerve and whether or not it is myelinated (unmyelinated = 2 m/s an ...
... A brief recovery period occurs during which the nerve cell membrane cannot be stimulated to carry impulses. This refractory period lasts a few thousandths of a second. The rate at which an impulse travels depends on the size of the nerve and whether or not it is myelinated (unmyelinated = 2 m/s an ...
Summary Sodium pump.
... • Neurotransmitters tend to be small molecules, some are even hormones. The time for neurotransmitter action is between 0,5 and 1 millisecond. Neurotransmitters are either destroyed by specific enzymes in the synaptic cleft, diffuse out of the cleft, or are reabsorbed by the cell. ...
... • Neurotransmitters tend to be small molecules, some are even hormones. The time for neurotransmitter action is between 0,5 and 1 millisecond. Neurotransmitters are either destroyed by specific enzymes in the synaptic cleft, diffuse out of the cleft, or are reabsorbed by the cell. ...
Chapter 5 Gases - LCMR School District
... their plasma membrane – their cytoplasm is more negatively charged than the interstitial fluid outside the cell • Negatively charged proteins and active transport of Na+ and K+ ions maintain voltage difference across a cell membrane, called the membrane potential • An unstimulated neuron has a resti ...
... their plasma membrane – their cytoplasm is more negatively charged than the interstitial fluid outside the cell • Negatively charged proteins and active transport of Na+ and K+ ions maintain voltage difference across a cell membrane, called the membrane potential • An unstimulated neuron has a resti ...
Chapter 5 Gases - Bethel Local Schools
... their plasma membrane – their cytoplasm is more negatively charged than the interstitial fluid outside the cell • Negatively charged proteins and active transport of Na+ and K+ ions maintain voltage difference across a cell membrane, called the membrane potential • An unstimulated neuron has a resti ...
... their plasma membrane – their cytoplasm is more negatively charged than the interstitial fluid outside the cell • Negatively charged proteins and active transport of Na+ and K+ ions maintain voltage difference across a cell membrane, called the membrane potential • An unstimulated neuron has a resti ...
Exam I
... Short answer questions 27) (6 pts) John was having one of his cholinergic (releases acetylcholine) neurons (X) signal a postsynaptic neuron (Y). But now he wants neuron Y to stop receiving the signals. Besides having neuron X stop sending action potentials down to the terminal, what other things mus ...
... Short answer questions 27) (6 pts) John was having one of his cholinergic (releases acetylcholine) neurons (X) signal a postsynaptic neuron (Y). But now he wants neuron Y to stop receiving the signals. Besides having neuron X stop sending action potentials down to the terminal, what other things mus ...
Neuroanatomy Handout #1: The Motor Neuron
... information with only close neighbors, and do not produce action potentials. • When stimulated, local neurons produce graded potentials which are membrane potentials that vary in magnitude and do not follow the all-or-none law,. • A local neuron depolarizes or hyperpolarizes in proportion to the sti ...
... information with only close neighbors, and do not produce action potentials. • When stimulated, local neurons produce graded potentials which are membrane potentials that vary in magnitude and do not follow the all-or-none law,. • A local neuron depolarizes or hyperpolarizes in proportion to the sti ...
Nerves Part 1 Powerpoint
... • If myelin is stripped off (by, for example, the immune system) there are no voltage-gated ion channels underneath it and the neuron fails to send signals – This is the cause and effect of Multiple Sclerosis, which paralyzes myelinated neurons while leaving other neurons intact ...
... • If myelin is stripped off (by, for example, the immune system) there are no voltage-gated ion channels underneath it and the neuron fails to send signals – This is the cause and effect of Multiple Sclerosis, which paralyzes myelinated neurons while leaving other neurons intact ...
Nervous System Test Review After you accidentally touch a hot pan
... 2. In order for a nerve impulse to pass from an axon tip to the next structure, it must cross a space called a _________________. a. synapse 3. The type of neuron known as a(n) _______________ neuron picks up stimuli from the external or internal environment and converts those stimuli to nerve impul ...
... 2. In order for a nerve impulse to pass from an axon tip to the next structure, it must cross a space called a _________________. a. synapse 3. The type of neuron known as a(n) _______________ neuron picks up stimuli from the external or internal environment and converts those stimuli to nerve impul ...
Reflex Arc - TangHua2012-2013
... An impulse can only travel across a synapse in one direction. Only the axon contains ______________________________________, so the impulse can only travel AXON DENDRITE across a synapse. **** ALL OR NONE LAW (threshold): If enough neurotransmitter is received by the postsynaptic fiber, it will fi ...
... An impulse can only travel across a synapse in one direction. Only the axon contains ______________________________________, so the impulse can only travel AXON DENDRITE across a synapse. **** ALL OR NONE LAW (threshold): If enough neurotransmitter is received by the postsynaptic fiber, it will fi ...
CNS II
... • Many others are inhibitory: they secrete a transmitter substance that inhibits the postsynaptic neuron • Fig. 45-6 • Synaptic cleft • Transmitter vesicles: contain transmitter substance that is released into the synaptic cleft to excite or inhibit the postsynaptic neuron • Excites with excitatory ...
... • Many others are inhibitory: they secrete a transmitter substance that inhibits the postsynaptic neuron • Fig. 45-6 • Synaptic cleft • Transmitter vesicles: contain transmitter substance that is released into the synaptic cleft to excite or inhibit the postsynaptic neuron • Excites with excitatory ...
We have seen how the Nervous System plays an important role in
... This needs A LOT of help. Good diagrams are a must for this topic!!! I’m not sure if this is too specific and needs to be more general, or if it is too general and needs to be more specific???????? We have seen how the nervous system plays an important role in reaction time, stability and balance, h ...
... This needs A LOT of help. Good diagrams are a must for this topic!!! I’m not sure if this is too specific and needs to be more general, or if it is too general and needs to be more specific???????? We have seen how the nervous system plays an important role in reaction time, stability and balance, h ...
GABA A Receptor
... neuron and can initiate chemical results that include long-term changes in cell structure that alter long term excitability ...
... neuron and can initiate chemical results that include long-term changes in cell structure that alter long term excitability ...
Biology 118 - Exam 2
... c. less - active transport d. greater - active transport 33. Which structure helps maintain the normal (resting) intracellular & extracellular ion concentrations? a. Na+-K+ pump * b. Voltage-gated Na+ channel c. Voltage-gated K+ channel d. Receptor gated channels 34. Action potentials travel most ra ...
... c. less - active transport d. greater - active transport 33. Which structure helps maintain the normal (resting) intracellular & extracellular ion concentrations? a. Na+-K+ pump * b. Voltage-gated Na+ channel c. Voltage-gated K+ channel d. Receptor gated channels 34. Action potentials travel most ra ...
Nerve Notes
... Parasymp often innervate same organs and act in opposition III. Cell Types A. Neurons - transmit nerve impulses B. Neuroglia carry out a variety of functions to aid and protect other components IV. ...
... Parasymp often innervate same organs and act in opposition III. Cell Types A. Neurons - transmit nerve impulses B. Neuroglia carry out a variety of functions to aid and protect other components IV. ...
Nerve tissue for stu..
... neurotubules (microtubules) Part of the perikaryon from which axon extends is called axon hillock. It is an area free of rER and GA. ...
... neurotubules (microtubules) Part of the perikaryon from which axon extends is called axon hillock. It is an area free of rER and GA. ...
PHYSIOLOGICAL PSYCHOLOGY UNIVERSITY OF CALICUT SCHOOL OF DISTANCE EDUCATION BSc Counselling Psychology
... 78. The ______________ tends to be more analytical; processes information bit by bit. a. Right hemisphere c. Occipital lobe b. Left hemisphere d. Temporal lobe 79. The _______________ tends to be more holistic; processes information with respect to global patterns. a. Right hemisphere c. Occipital l ...
... 78. The ______________ tends to be more analytical; processes information bit by bit. a. Right hemisphere c. Occipital lobe b. Left hemisphere d. Temporal lobe 79. The _______________ tends to be more holistic; processes information with respect to global patterns. a. Right hemisphere c. Occipital l ...
Describe how action potentials are generated
... Essay Question for exam 3 Describe how action potentials are generated and propagated along neurons. Include in your description how intracellular voltage changes during the action potential by labeling the action potential tracing (shown below) and describing what is occurring at that particular ti ...
... Essay Question for exam 3 Describe how action potentials are generated and propagated along neurons. Include in your description how intracellular voltage changes during the action potential by labeling the action potential tracing (shown below) and describing what is occurring at that particular ti ...
Describe how action potentials are generated and
... Essay Question for exam 3 Describe how action potentials are generated and propagated along neurons. Include in your description how intracellular voltage changes during the action potential by labeling the action potential tracing (shown below) and describing what is occurring at that particular ti ...
... Essay Question for exam 3 Describe how action potentials are generated and propagated along neurons. Include in your description how intracellular voltage changes during the action potential by labeling the action potential tracing (shown below) and describing what is occurring at that particular ti ...
How the Nervous System Works
... The nervous system receives information about what is happening both inside and outside your body. It also directs the way in which your body responds to this information. In addition, the nervous system helps maintain homeostasis. A stimulus is any change or signal in the environment that can make ...
... The nervous system receives information about what is happening both inside and outside your body. It also directs the way in which your body responds to this information. In addition, the nervous system helps maintain homeostasis. A stimulus is any change or signal in the environment that can make ...
Learn about synapses
... At the synaptic terminal (the presynaptic ending), an electrical impulse will trigger the migration of vesicles (the red dots in the figure to the left) containing neurotransmitters toward the presynaptic membrane. The vesicle membrane will fuse with the presynaptic membrane releasing the neurotrans ...
... At the synaptic terminal (the presynaptic ending), an electrical impulse will trigger the migration of vesicles (the red dots in the figure to the left) containing neurotransmitters toward the presynaptic membrane. The vesicle membrane will fuse with the presynaptic membrane releasing the neurotrans ...
The Nervous System
... The neuron becomes positively charged and an action potential is been generated. ...
... The neuron becomes positively charged and an action potential is been generated. ...
Central Nervous System
... using the pump • 2 K+ move in the membrane using the same pump • The net effect, since there are more Na+ ions outside than K+ ions inside, the cell membrane has a strong positive charge outside. The difference from the inside to the outside is -70 mV, or the resting potential. ...
... using the pump • 2 K+ move in the membrane using the same pump • The net effect, since there are more Na+ ions outside than K+ ions inside, the cell membrane has a strong positive charge outside. The difference from the inside to the outside is -70 mV, or the resting potential. ...
Nerve Impulses - manorlakesscience
... change in the charge across the axon membrane. A nerve impulse is a wave of electrical change (an action potential) that passes rapidly along an axon. After the nerve impulse has been transmitted – the distribution of ions across the cell membrane is restored. ...
... change in the charge across the axon membrane. A nerve impulse is a wave of electrical change (an action potential) that passes rapidly along an axon. After the nerve impulse has been transmitted – the distribution of ions across the cell membrane is restored. ...
Practice questions 1. How are functionalism and behaviourism
... a) photoreceptors, a blind spot b) bipolar cells, the neural pathway c) ganglion cells, the optic nerve d) amacrine cells, the optic tract 20. There are two major theories of colour vision: the trichromatic theory and opponentprocess theory. While the tenet of the trichromatic theory is that differe ...
... a) photoreceptors, a blind spot b) bipolar cells, the neural pathway c) ganglion cells, the optic nerve d) amacrine cells, the optic tract 20. There are two major theories of colour vision: the trichromatic theory and opponentprocess theory. While the tenet of the trichromatic theory is that differe ...
Nonsynaptic plasticity
Nonsynaptic plasticity is a form of neuroplasticity that involves modification of ion channel function in the axon, dendrites, and cell body that results in specific changes in the integration of excitatory postsynaptic potentials (EPSPs) and inhibitory postsynaptic potentials (IPSPs). Nonsynaptic plasticity is a modification of the intrinsic excitability of the neuron. It interacts with synaptic plasticity, but it is considered a separate entity from synaptic plasticity. Intrinsic modification of the electrical properties of neurons plays a role in many aspects of plasticity from homeostatic plasticity to learning and memory itself. Nonsynaptic plasticity affects synaptic integration, subthreshold propagation, spike generation, and other fundamental mechanisms of neurons at the cellular level. These individual neuronal alterations can result in changes in higher brain function, especially learning and memory. However, as an emerging field in neuroscience, much of the knowledge about nonsynaptic plasticity is uncertain and still requires further investigation to better define its role in brain function and behavior.