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Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Answers to questions 1 and 2 please
Zoom 1. A 19-year-old boy visited a dental surgeon for the removal of his left upper wisdom tooth. He was fearful, as he knew that the procedure was painful. However, he was relieved to learn that he would not feel the pain as the doctor would numb his jaw using a local anesthetic injection. This drug blocks voltage-gated sodium channels. Explain what phase of an action potential will be affected and why. 2. An autopsy report of 52 year old male showed that Mr. Charles was given an injection of intravenous potassium which led to his rapid death. Define resting membrane potential (RMP), identify factors that contribute towards RMP, and why a high concentration of potassium in the ECF will impact the RMP and lead to rapid death?
Transcribed Image Text:Zoom 1. A 19-year-old boy visited a dental surgeon for the removal of his left upper wisdom tooth. He was fearful, as he knew that the procedure was painful. However, he was relieved to learn that he would not feel the pain as the doctor would numb his jaw using a local anesthetic injection. This drug blocks voltage-gated sodium channels. Explain what phase of an action potential will be affected and why. 2. An autopsy report of 52 year old male showed that Mr. Charles was given an injection of intravenous potassium which led to his rapid death. Define resting membrane potential (RMP), identify factors that contribute towards RMP, and why a high concentration of potassium in the ECF will impact the RMP and lead to rapid death?
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The resting potential is determined by concentration gradients of ions across the membrane and by membrane permeability to each type of ion. It is negative  in the inside of the membrane and on average it is - 70 Mv.

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