Unit 2-Week 1 Notes Sheets
... Topic: ____________________________________________________ Date: ______________________ ...
... Topic: ____________________________________________________ Date: ______________________ ...
NEURONS
... _________________________- ( STIMULI - plural )- any change in the environment which causes a response. EX- light, gravity, food, etc. *The ability to RESPOND to a stimulus is common to _______ living things !!! ...
... _________________________- ( STIMULI - plural )- any change in the environment which causes a response. EX- light, gravity, food, etc. *The ability to RESPOND to a stimulus is common to _______ living things !!! ...
Nervous System Spinal Cord and Nerves Spinal Cord
... Difference in electrical charge between inside and outside of neuron is called “potential”. ...
... Difference in electrical charge between inside and outside of neuron is called “potential”. ...
Chapter 11: Fundamentals of the Nervous System and Nervous Tissue
... Resting Membrane Potential (Vr) 1. The potential difference (–70 mV) across the membrane of a resting neuron 2. It is generated by different concentrations of Na+, K+, Cl−, and protein anions (A−) 3. Ionic differences are the consequence of a. Differential permeability of the neurilemma to Na+ and K ...
... Resting Membrane Potential (Vr) 1. The potential difference (–70 mV) across the membrane of a resting neuron 2. It is generated by different concentrations of Na+, K+, Cl−, and protein anions (A−) 3. Ionic differences are the consequence of a. Differential permeability of the neurilemma to Na+ and K ...
Chapter 12 – Introduction to the Nervous System
... 3. What happens at the peak of an action potential? 4. What maintains the RMP after an action potential? 5. True or false: the magnitude of a stimulus directly affects the magnitude of an action potential. **Suggested reading for action potentials: (p. 355358) ...
... 3. What happens at the peak of an action potential? 4. What maintains the RMP after an action potential? 5. True or false: the magnitude of a stimulus directly affects the magnitude of an action potential. **Suggested reading for action potentials: (p. 355358) ...
Action Potentials are - Winona State University
... • 7) Original membrane potential is re-established and cell waits to repeat action. ...
... • 7) Original membrane potential is re-established and cell waits to repeat action. ...
Cognitive Psychology
... Depolarization of the AP • As opposed to the nongated ion channels discussed so far, action potentials are driven by gated channels that open in response to high voltage levels (the threshold). • In particular, gated Na+ channels are opened by membrane depolarization, which allows Na+ into the cell ...
... Depolarization of the AP • As opposed to the nongated ion channels discussed so far, action potentials are driven by gated channels that open in response to high voltage levels (the threshold). • In particular, gated Na+ channels are opened by membrane depolarization, which allows Na+ into the cell ...
bioii ch10 ppt
... •This is the most abundant excitatory neurotransmitter in the vertebrate nervous system. It is also the major excitatory transmitter in the brain, and major mediator of excitatory signals in the mammalian central nervous system, involved in most aspects of normal brain functions including cognition, ...
... •This is the most abundant excitatory neurotransmitter in the vertebrate nervous system. It is also the major excitatory transmitter in the brain, and major mediator of excitatory signals in the mammalian central nervous system, involved in most aspects of normal brain functions including cognition, ...
BIOLOGY 12: U NIT M/N - C A. CHAPTER REVIEW 1. What are the
... 3. Distinguish between the three types of neurons. (ie. compare lengths of dendrites/ axons) _____________________________________________________________________________________________________________________ _________________________________________________________________________________________ ...
... 3. Distinguish between the three types of neurons. (ie. compare lengths of dendrites/ axons) _____________________________________________________________________________________________________________________ _________________________________________________________________________________________ ...
chapt12-nervous system
... The action potential occurs in each successive portion of an axon. A refractory period ensures that the action potential will not move backwards. In myelinated fibers the action potential only occurs at the nodes of Ranvier. This is called saltatory conduction. The Synapse Transmission of the nerve ...
... The action potential occurs in each successive portion of an axon. A refractory period ensures that the action potential will not move backwards. In myelinated fibers the action potential only occurs at the nodes of Ranvier. This is called saltatory conduction. The Synapse Transmission of the nerve ...
Somatosensory system
... Dorsal root ganglia - spinal nerve - limb and trunk Trigeminal ganglia - cranial nerve - head and face ...
... Dorsal root ganglia - spinal nerve - limb and trunk Trigeminal ganglia - cranial nerve - head and face ...
NERVES
... Action Potential- the reversal and restoration across the plasma membrane of a cell, as an electrical inpulse passes along it (depolarization and repolarization). A stimulus strong enough to produce a depolarization that reaches the threshold triggers the action potential When an impulse passes alon ...
... Action Potential- the reversal and restoration across the plasma membrane of a cell, as an electrical inpulse passes along it (depolarization and repolarization). A stimulus strong enough to produce a depolarization that reaches the threshold triggers the action potential When an impulse passes alon ...
Chapter 48 Reading Guide and Key Terms
... How does an action potential differ from a graded potential? ...
... How does an action potential differ from a graded potential? ...
steps in nerve impulse transmission
... 1. Neurotransmitters (NT) are chemicals released from one neuron at the presynaptic nerve terminal. 2. NT then cross the synapse where they may be accepted by the next neuron at a specialized site called a receptor 3. The action that follows activation of a receptor site may be either depolarizati ...
... 1. Neurotransmitters (NT) are chemicals released from one neuron at the presynaptic nerve terminal. 2. NT then cross the synapse where they may be accepted by the next neuron at a specialized site called a receptor 3. The action that follows activation of a receptor site may be either depolarizati ...
The nervous system
... NERVOUS SYSTEM INTERNAL/EXTERNAL MESSAGES SENSORY RECEPTORS: PICK UP STIMULI AND TRANSFORMS THEM INTO NERVE IMPULSES 2 TYPES OF NERVES: sensory and motor ...
... NERVOUS SYSTEM INTERNAL/EXTERNAL MESSAGES SENSORY RECEPTORS: PICK UP STIMULI AND TRANSFORMS THEM INTO NERVE IMPULSES 2 TYPES OF NERVES: sensory and motor ...
Synapses and neuronal signalling
... involved in achieving functional outcomes • Simple reflex responses are organised within spinal segments but sensory information is also fed to higher centres ...
... involved in achieving functional outcomes • Simple reflex responses are organised within spinal segments but sensory information is also fed to higher centres ...
PPT File - Holden R
... response to receptor potential – Secondary: Have no axons and receptor potentials produced do not result in action potentials but cause release of neurotransmitters ...
... response to receptor potential – Secondary: Have no axons and receptor potentials produced do not result in action potentials but cause release of neurotransmitters ...
Chapter 14
... response to receptor potential – Secondary: Have no axons and receptor potentials produced do not result in action potentials but cause release of neurotransmitters ...
... response to receptor potential – Secondary: Have no axons and receptor potentials produced do not result in action potentials but cause release of neurotransmitters ...
Take the 10-item multiple choice quiz to check
... (3) action potentials in sensory neurons of the muscle spindles increase (4) action potentials in alpha motor neurons of skeletal muscle fibers increase (5) skeletal muscle of the back contract a. b. c. d. e. ...
... (3) action potentials in sensory neurons of the muscle spindles increase (4) action potentials in alpha motor neurons of skeletal muscle fibers increase (5) skeletal muscle of the back contract a. b. c. d. e. ...
Module Worksheet - Germantown School District
... Given what you know about synaptic transmission, how do you think a message jumps across the synaptic gap and is passed to the next neuron? ...
... Given what you know about synaptic transmission, how do you think a message jumps across the synaptic gap and is passed to the next neuron? ...
PsychSim 5: NEURAL MESSAGES Name: Section: Date: ______
... • Given what you know about synaptic transmission, how do you think a message jumps across the synaptic gap and is passed to the next neuron? ...
... • Given what you know about synaptic transmission, how do you think a message jumps across the synaptic gap and is passed to the next neuron? ...
Rheobase
Rheobase is a measure of membrane excitability. In neuroscience, rheobase is the minimal current amplitude of infinite duration (in a practical sense, about 300 milliseconds) that results in the depolarization threshold of the cell membranes being reached, such as an action potential or the contraction of a muscle. In Greek, the root ""rhe"" translates to current or flow, and ""basi"" means bottom or foundation: thus the rheobase is the minimum current that will produce an action potential or muscle contraction.Rheobase can be best understood in the context of the strength-duration relationship (Fig. 1). The ease with which a membrane can be stimulated depends on two variables: the strength of the stimulus, and the duration for which the stimulus is applied. These variables are inversely related: as the strength of the applied current increases, the time required to stimulate the membrane decreases (and vice versa) to maintain a constant effect. Mathematically, rheobase is equivalent to half the current that needs to be applied for the duration of chronaxie, which is a strength-duration time constant that corresponds to the duration of time that elicits a response when the nerve is stimulated at twice rheobasic strength.The strength-duration curve was first discovered by G. Weiss in 1901, but it was not until 1909 that Louis Lapicque coined the term ""rheobase"". Many studies are being conducted in relation to rheobase values and the dynamic changes throughout maturation and between different nerve fibers. In the past strength-duration curves and rheobase determinations were used to assess nerve injury; today, they play a role in clinical identification of many neurological pathologies, including as Diabetic neuropathy, CIDP, Machado-Joseph Disease, and ALS.