Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN: 9781285866932
Author: Lauralee Sherwood
Publisher: Cengage Learning
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Question
Chapter 4.2, Problem 2CYU
Summary Introduction
To explain:
The effect of the increase in potential and resistance on current flow.
Introduction:
Any flow of electrical charges is called a current. By convention, the current flow direction is expressed as the direction in which the positive charges move.The difference in electric potential on the opposite sides of the cell membrane is called membrane potential.
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Chapter 4 Solutions
Human Physiology: From Cells to Systems (MindTap Course List)
Ch. 4.1 - Name the two types of excitable tissue.Ch. 4.1 - Prob. 2CYUCh. 4.1 - State the factor responsible for triggering gate...Ch. 4.2 - Prob. 1CYUCh. 4.2 - Prob. 2CYUCh. 4.2 - Prob. 3CYUCh. 4.3 - Draw and label an action potential, indicating the...Ch. 4.3 - Prob. 2CYUCh. 4.3 - Prob. 3CYUCh. 4.3 - Prob. 4CYU
Ch. 4.4 - Explain why synapses operate only in the direction...Ch. 4.4 - Prob. 2CYUCh. 4.4 - Prob. 3CYUCh. 4.4 - Prob. 4CYUCh. 4.5 - Define target cell.Ch. 4.5 - Distinguish among the four types of extracellular...Ch. 4.5 - Outline the three general means by which binding...Ch. 4.5 - Prob. 4CYUCh. 4.6 - Distinguish between cytokines and eicosanoids.Ch. 4.6 - Discuss the roles of phospholipase A2,...Ch. 4.6 - Prob. 3CYUCh. 4.7 - Prob. 1CYUCh. 4.7 - Prob. 2CYUCh. 4.7 - Prob. 3CYUCh. 4.8 - Prob. 1CYUCh. 4.8 - Prob. 2CYUCh. 4 - Conformational changes in channel proteins brought...Ch. 4 - Prob. 2RECh. 4 - Prob. 3RECh. 4 - Prob. 4RECh. 4 - Second-messenger systems ultimately bring about...Ch. 4 - Each steroidogenic organ has all the enzymes...Ch. 4 - Prob. 7RECh. 4 - Prob. 8RECh. 4 - Prob. 9RECh. 4 - Prob. 10RECh. 4 - Prob. 11RECh. 4 - Prob. 12RECh. 4 - Prob. 13RECh. 4 - A common membrane-bound intermediary between the...Ch. 4 - Prob. 15RECh. 4 - Prob. 16RECh. 4 - Prob. 17RECh. 4 - Prob. 18RECh. 4 - Define the following terms: polarization,...Ch. 4 - Prob. 2UCCh. 4 - Prob. 3UCCh. 4 - Prob. 4UCCh. 4 - Compare the four kinds of gated channels in terms...Ch. 4 - Prob. 6UCCh. 4 - Prob. 7UCCh. 4 - Prob. 8UCCh. 4 - Prob. 9UCCh. 4 - Define signal transduction.Ch. 4 - Compare the tyrosine kinase and JAK/STAT pathways.Ch. 4 - Prob. 12UCCh. 4 - Prob. 13UCCh. 4 - Describe how arachidonic acid is converted into...Ch. 4 - Prob. 15UCCh. 4 - Prob. 16UCCh. 4 - Explain how the cascading effect of hormonal...Ch. 4 - Prob. 18UCCh. 4 - Answer the following questions regarding...Ch. 4 - Prob. 2SQECh. 4 - Prob. 3SQECh. 4 - Prob. 1ACRCh. 4 - The rate at which the Na+K+ pump operates is not...Ch. 4 - Which of the following would occur if a neuron...Ch. 4 - Prob. 3TAHLCh. 4 - Assume presynaptic excitatory neuron A terminates...Ch. 4 - Prob. 5TAHL
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- What property is responsible for the initial ramp of the membrane potential at the onset of the current pulse?A: Membrane capacitanceB: Membrane resistance explain your choicearrow_forwardDescribe what would happen to the action potential if we blocked the Calcium channels in caridac myocytes, and the effect it would have on the heart.arrow_forwardExplain the difference between tonic and antagonistic control of homeostatic balance. Fig. 6.15 Give two examples of each.arrow_forward
- Calculate the power generated by the right ventricle during (a) restful state; blood flow 5 L/min, and (b) intense activity; blood flow 25 L/min. Answer: (a) P = 0.25 W; (B) P = 4.5 Warrow_forwardCalculate the driving force for Na+, K+, and Ca2+ current in a neuron under physiological conditions.arrow_forwardBriefly explain the arrangement of vasa recta for counter current mechanism?arrow_forward
- Make a list of the different physiological equations: Cardiac Output (Q) = Fick Equation for VO2 = Pulse Pressure (PP) =arrow_forwardPropagation of action potential and transmission mean: current flow along the cell membrane current flow through the synapse current flow using saltatory conduction all of the abovearrow_forwardIf branch A is twice the length of branch B, what is true regarding the resistance in branch A compared to B?arrow_forward
- Explain how and why membrane potential changes during anaction potentialarrow_forwardExplain the time course of the opening and closing of v-g Na+ and K+ channels during the action potential. How does that affect the ionic currents? COMMENTS : answer this question to best of your knowledge to understand the concept wellarrow_forwardThe resting potential is dependent upon the electrochemical gradient for potassium ions because: The permeability of the resting membrane to potassium is higher than for other ions Of the activity of the sodium/potassium ATPase pump Cells contain largely potassium The permeability to sodium ions is very small except during action potentialsarrow_forward
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