Eliciting a Nerve Impulse Activity 1: Electrical Stimulation 1. Do you see any kind of response on the oscilloscope screen? No there was no response‚ the line was flat 2. What was the threshold voltage‚ or the voltage at which you first saw an action potential? 3.0V 3. How does this tracing compare to the one that was generated at the threshold voltage? At 3.5V the high & low peaks were just slightly above and below respectively the tracing that occurred at 3.0V 4. What reason can you give for the
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the heart muscles and this is how the heart pumping blood out to the entire body and how the heart contract. The stages of the pathway of action potential: 1) The Action Potential is in the Sinoatrial node (SA). Action potential then travels from the SA node to the AV (atrioventricular node) by crossing to the wall of the atrium. 2) Then the action potentials slowly pass through the AV node and it give time for the atria to contract. 3) Then it’s rapidly passes through the atrioventricular bundle
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Exercise 3: Neurophysiology of Nerve Impulses: Activity 7: The Action Potential: Conduction Velocity Lab Report Pre-lab Quiz Results You scored 100% by answering 5 out of 5 questions correctly. 1. An action potential can be propagated along an axon because there are __________ channels in the membrane. You correctly answered: d. voltage-gated 2. The units of conduction velocity are You correctly answered: d. meters/second. 3. Which of the following will affect axonal conduction velocity? You correctly
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Impulses: Activity 9: The Action Potential: Putting It All Together Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. Sensory neurons respond to an appropriate sensory stimulus with a change in membrane potential that is You correctly answered: b. graded with the stimulus intensity. 2. If the depolarization that reaches the axon is large and suprathreshold‚ the result in the axon is You correctly answered: c. action potentials at higher frequency
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terms depolarization and action potential mean the same thing? Action potential is a quick depolarization followed by a repolarization. Depolarization is a one way trip. It also takes a substantial depolarization to cause an action potential. 2. What was the threshold voltage in Activity 1? 3.0 V 3. What was the effect of increasing the voltage? How does this change correlate to changes in the nerve? there was a slight increase 4. How did the action potential generated with the unheated
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CHAPTER 1 Topic: The Science of Behaviour Textbook Pages: 4-24 THE NATURE OF PSYCHOLOGY Psychology: The Scientific study of behaviour and the mind. Behaviour: Actions and responses that we can directly observe. Mind: Internal states and processes‚ such as thoughts and feelings‚ that cannot be seen directly and that must be inferred from observable‚ measurable responses. Clinical Psychology: Subfield where psychologists study and treat mental disorders. Cognitive Psychology: Specializes
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patch-clamp electrophysiology‚ investigators have recently cloned‚ expressed‚ and characterized the genes encoding many of these proteins. Ion-channel proteins are under intense scrutiny in an effort to determine their roles in pathophysiology and as potential targets for drugs. Defective ion-channel proteins are responsible for cystic fibrosis‚1 the long-QT syndrome‚2 heritable hypertension (Liddle’s syndrome)‚3‚4 familial persistent hyperinsulinemic hypoglycemia of infancy‚5‚6 hereditary nephrolithiasis
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NAME: 1. Match each of the definitions in Column A with the appropriate term in Column B. Column A Column B __D__ term that refers to a membrane potential of about -70 mv __F__ reversal of membrane potential due to influx of sodium ions __B__ major cation found outside of a cell __A__ minimal stimulus needed to elicit an action potential __E__ period when cell membrane is totally insensitive to additional stimuli‚ regardless of the stimulus force applied __C__ major cation found inside
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irritability‚ conductivity‚ resting membrane potential‚ polarized‚ sodium-potassium pump‚ threshold stimulus‚ depolarization‚ action potential‚ repolarization‚ hyperpolarization‚ absolute refractory period‚ relative refractory period‚ nerve impulse‚ compound nerve action potential‚ and conduction velocity. 2. To list at least four different stimuli capable of generating an action potential. 3. To list at least two agents capable of inhibiting an action potential. 4. To describe the relationship between
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is a need to follow protocol: Clients have the right to refuse to take a medication. Determine the reason for refusal‚ provide information regarding the risk of refusal‚ and notify the appropriate health care personnel‚ and document refusal and actions taken. Health Promotion and Maintenance 1. Briefly explain Lactation/Pregnancy Risk Categories Category A: Controlled studies in pregnant women fail to demonstrate a risk to the fetus in the first trimester with no evidence of risk in later trimesters
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