Fundamentals of Anatomy and Physiology (Looseleaf) (Custom Package)
10th Edition
ISBN: 9781323046999
Author: Martini
Publisher: PEARSON
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Chapter 12, Problem 27CP
Summary Introduction
To determine:
Refer to checkpoint question 26; determine the form of summation that will occur, if two EPSPs occur simultaneously.
Introduction:
An individual excitatory post synaptic potential (EPSP) alters the membrane potential by a very small amount (0.5 mV). The threshold level of potential to generate an action potential in the postsynaptic cell is 10 mV. Therefore, a single EPSP cannot generate an action potential. The summation of all the EPSPs occurs to generate the action potential. The summation may occur in two ways, namely temporal summation and spatial summation.
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Chapter 12 Solutions
Fundamentals of Anatomy and Physiology (Looseleaf) (Custom Package)
Ch. 12 - Prob. 1CPCh. 12 - Describe the two functional divisions of the...Ch. 12 - 3. Identify the two components of the efferent...Ch. 12 - Prob. 4CPCh. 12 - Name the structural components of a typical...Ch. 12 - Classify neurons according to their structure.Ch. 12 - Classify neurons according to their function.Ch. 12 - Prob. 8CPCh. 12 - Prob. 9CPCh. 12 - Prob. 10CP
Ch. 12 - Prob. 11CPCh. 12 - Prob. 12CPCh. 12 - Prob. 13CPCh. 12 - What effect would decreasing the concentration of...Ch. 12 - Define action potential.Ch. 12 - Identify the steps involved in the generation and...Ch. 12 - Prob. 17CPCh. 12 - Which of the following axons is myelinated: one...Ch. 12 - Prob. 19CPCh. 12 - Prob. 20CPCh. 12 - What effect would blocking voltage-gated calcium...Ch. 12 - Prob. 22CPCh. 12 - Prob. 23CPCh. 12 - Prob. 24CPCh. 12 - Prob. 25CPCh. 12 - Prob. 26CPCh. 12 - Prob. 27CPCh. 12 - LEVEL 1 Reviewing Facts and Terms 1. Label the...Ch. 12 - Prob. 2RQCh. 12 - Prob. 3RQCh. 12 - Prob. 4RQCh. 12 - The neural cells responsible for the analysis of...Ch. 12 - Depolarization of a neuron plasma membrane will...Ch. 12 - Prob. 7RQCh. 12 - Receptors that bind acetylcholine at the...Ch. 12 - What are the major components of (a) the central...Ch. 12 - Prob. 10RQCh. 12 - Prob. 11RQCh. 12 - If the resting membrane potential of a neuron is...Ch. 12 - Prob. 13RQCh. 12 - What is the difference between anterograde flow...Ch. 12 - What is the functional difference among chemically...Ch. 12 - State the all-or-none principle cf action...Ch. 12 - Prob. 17RQCh. 12 - Prob. 18RQCh. 12 - What are the structural and functional differences...Ch. 12 - Describe the events that occur during nerve...Ch. 12 - Prob. 21RQCh. 12 - Prob. 22RQCh. 12 - Prob. 23RQCh. 12 - In multiple sclerosis, there is intermittent and...Ch. 12 - Prob. 25RQCh. 12 - Prob. 1CCCh. 12 - Prob. 2CC
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- Is THE resting membrane potential negative?arrow_forwardExplain the difference between the relative and absolute refractory periods. Briefly describe the cellular events responsible for the refractory period. (Hint: Discuss the mechanism of repolarization).arrow_forwardWhat is long-term potentiation (LTP) and how does it occur? What changes in the cell should we expect to observe when a synapse is in a "potentiated" state?arrow_forward
- What happens at the nodes of Ranvier in a myelinated axon?arrow_forwardIn excitable cells, such as neurons, K+ is held at a much higher concentration inside the cell than outside. Which of the following would hold K+ at this concentration?arrow_forwardWhat becomes active during a sag in neuron which is an indication of hyperpolarisation activated cation current?arrow_forward
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