Glossary
... An inherited characteristic that increased in a population (through natural selection) because it helped solve a problem of survival or reproduction during the time it emerged. ...
... An inherited characteristic that increased in a population (through natural selection) because it helped solve a problem of survival or reproduction during the time it emerged. ...
Data/hora: 28/03/2017 12:03:40 Provedor de dados: 17 País: United
... Resumo: The neuron, when considered as a signal processing device, itsinputs are the frequency of pulses received at the synapses, and its output is the frequency of action potentials generated- in essence, a neuron is a pulse frequency signal processing device. In comparison, electrical devices use ...
... Resumo: The neuron, when considered as a signal processing device, itsinputs are the frequency of pulses received at the synapses, and its output is the frequency of action potentials generated- in essence, a neuron is a pulse frequency signal processing device. In comparison, electrical devices use ...
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 ...
Brain & Behavior
... recharge, so to speak • K(+) pumped out of cell, (-) charge restored • Refractory period – neuron cannot fire again during this process ...
... recharge, so to speak • K(+) pumped out of cell, (-) charge restored • Refractory period – neuron cannot fire again during this process ...
Nervous System
... reversal in membrane potential (outside = - ; inside = +) = depolarization How? - controlled by gated protein channels in the membrane - stimulus small depolarization triggers opening of Na+ ion channels - if stimulus causes enough Na+ to move in = threshold: a stimulus causes minimum depolarizati ...
... reversal in membrane potential (outside = - ; inside = +) = depolarization How? - controlled by gated protein channels in the membrane - stimulus small depolarization triggers opening of Na+ ion channels - if stimulus causes enough Na+ to move in = threshold: a stimulus causes minimum depolarizati ...
Types of neurons
... With inputs to dendrites inside becomes more positive if resting potential rises above threshold an action potential starts to travel from cell body down the axon Figure shows resting axon being approached by an AP ...
... With inputs to dendrites inside becomes more positive if resting potential rises above threshold an action potential starts to travel from cell body down the axon Figure shows resting axon being approached by an AP ...
Nerve cells - Spark (e
... In biology are defined dendrites the minor fibers branching from the neuron, they carry nerve signals in centripetal direction. The dendrites are shorter and thinner than the axon. ...
... In biology are defined dendrites the minor fibers branching from the neuron, they carry nerve signals in centripetal direction. The dendrites are shorter and thinner than the axon. ...
Nervous System - APBio
... • Three bones of the middle ear transmit the vibrations to the oval window, a membrane on the cochlea’s surface • The vibration against the oval window creates pressure waves in the fluid • Waves travel through the vestibular canal, pass around the tip of the cochlea and move through the tympanic c ...
... • Three bones of the middle ear transmit the vibrations to the oval window, a membrane on the cochlea’s surface • The vibration against the oval window creates pressure waves in the fluid • Waves travel through the vestibular canal, pass around the tip of the cochlea and move through the tympanic c ...
Heart
... Difusion - free transport of small non-polar molecules across membrane Membrane channel - transmembrane protein - transport is possible without additional energy - cell can regulate whether it is open or not (deactivated) - channel is specific for particular molecule Osmosis -solvent molecules go th ...
... Difusion - free transport of small non-polar molecules across membrane Membrane channel - transmembrane protein - transport is possible without additional energy - cell can regulate whether it is open or not (deactivated) - channel is specific for particular molecule Osmosis -solvent molecules go th ...
Module 3 Brain`s Building Blocks
... are arranged like rungs on a twisted ladder There are about 30,000 genes that contain chemical instructions that equal about 300,000 pages of written instructions Genes program the development of individual parts into a complex body & brain ...
... are arranged like rungs on a twisted ladder There are about 30,000 genes that contain chemical instructions that equal about 300,000 pages of written instructions Genes program the development of individual parts into a complex body & brain ...
Document
... • Occipital = Back, used for vision and reading. • Temporal = Lower sides, hearing and memory. ...
... • Occipital = Back, used for vision and reading. • Temporal = Lower sides, hearing and memory. ...
Nervous System Student Notes File
... neurotransmitters that open Na+ gates triggering depolarization c) _________________________________________________ (IPSP) are caused by neurotransmitters which open K+ or Cl- gates causing hyperpolarization d) A single EPSP is rarely strong enough to trigger an action potential, although and addit ...
... neurotransmitters that open Na+ gates triggering depolarization c) _________________________________________________ (IPSP) are caused by neurotransmitters which open K+ or Cl- gates causing hyperpolarization d) A single EPSP is rarely strong enough to trigger an action potential, although and addit ...
ADAM Nervous System Ion Channels Use this program only if you
... Use this program only if you need to review the differences between active and passive cell channels and voltage-gated and chemically-gated channels. Membrane Potential 1. What causes the outside surface of the cell membrane to be more positive? 2. The resting membrane potential in a neuron results ...
... Use this program only if you need to review the differences between active and passive cell channels and voltage-gated and chemically-gated channels. Membrane Potential 1. What causes the outside surface of the cell membrane to be more positive? 2. The resting membrane potential in a neuron results ...
File - Mr. Haan`s Science
... 2. 3 overlapping functions a. Sensory input – sense receptors to monitor change in and out of body b. Integration – processes and interprets data to see what to do c. Motor output – causes response of effector organs ...
... 2. 3 overlapping functions a. Sensory input – sense receptors to monitor change in and out of body b. Integration – processes and interprets data to see what to do c. Motor output – causes response of effector organs ...
CHAPTER 10
... Graded means that the degree of change in the resting potential is directly proportional to the intensity of the stimulation. For example, if the membrane is being depolarized, the greater the stimulus, the greater the depolarization. If neurons are depolarized sufficiently, the membrane potential r ...
... Graded means that the degree of change in the resting potential is directly proportional to the intensity of the stimulation. For example, if the membrane is being depolarized, the greater the stimulus, the greater the depolarization. If neurons are depolarized sufficiently, the membrane potential r ...
Peripheral Nervous System
... electrochemical messages from the brain or through chemical messengers – hormones There are more nerve cells in the body than there are visible stars in the Milky Way! 1 cm3 of brain tissue houses several million neurons with each connecting with several thousand others ...
... electrochemical messages from the brain or through chemical messengers – hormones There are more nerve cells in the body than there are visible stars in the Milky Way! 1 cm3 of brain tissue houses several million neurons with each connecting with several thousand others ...
Topic 4
... Artificial injection of current (ions) into a neuron (using a microelectrode) can be used to experimentally manipulate a neuron from its interior. ...
... Artificial injection of current (ions) into a neuron (using a microelectrode) can be used to experimentally manipulate a neuron from its interior. ...
Chapter 2 (The Brain) Study Guide 1. What is a neuron? What are
... 1. What is a neuron? What are the three basic types of neurons? What is the difference 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? En ...
... 1. What is a neuron? What are the three basic types of neurons? What is the difference 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? En ...
Slideshow
... membrane has a negative charge. • As the figure shows, a Na+ / K+ pump in the cell membrane pumps sodium out of the cell and potassium into it. • However, more potassium ions leak out of the cell. Thus the inside of the membrane builds up a net negative charge relative to the outside. ...
... membrane has a negative charge. • As the figure shows, a Na+ / K+ pump in the cell membrane pumps sodium out of the cell and potassium into it. • However, more potassium ions leak out of the cell. Thus the inside of the membrane builds up a net negative charge relative to the outside. ...