Becker's World of the Cell (9th Edition)
Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Osmosis
In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has…
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Chapter 22, Problem 22.3PS

QUANTITATIVE Patch Clamping. Patch-clamp instruments enable researchers to measure the opening and closing of a single channel in a membrane. A typical acetylcholine receptor channel passes about 5 pA (picoamperes) of ionic current (1 picoampere = 10−12 ampere) over a period of about 5 msec at −60 mV.

(a) Given that an electrical current of 1 A is about 6.2 × 1018 electrical charges per second, how many ions (potassium or sodium) pass through the channel during the time it is open?

(b) Do you think the opening of a single receptor channel would be sufficient to depolarize a postsynaptic membrane? Why or why not?

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Chapter 22 Solutions

Becker's World of the Cell (9th Edition)

Ch. 22 - Ouabain is an African plant derivative that has...Ch. 22 - You have isolated a toxin from a previously...Ch. 22 - The poison produced by some species of Central and...Ch. 22 - Drugs that affect the reuptake of...Ch. 22 - The Truth About Nerve Cells. For each of the...Ch. 22 - QUANTITATIVE The Resting Membrane Potential. The...Ch. 22 - QUANTITATIVE Patch Clamping. Patch-clamp...Ch. 22 - The Equilibrium Potential. Answer each of the...Ch. 22 - QUANTITATIVE Heart Throbs. An understanding of...Ch. 22 - The All-or-None Response of Membrane Excitation. A...
Ch. 22 - One-Way Propagation. Why does an action potential...Ch. 22 - Multiple Sclerosis and Action Potential...Ch. 22 - Stricken by Strychnine. The plant alkaloid...Ch. 22 - Down and Out. Endocannabinoids are produced by...
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license