Gap junctions are involved in O endocrine O none of the other choices O neural O paracrine QUESTION 2 Potassium ions enter a cell by O active transport, diffusion O diffusion, diffusion O active transport, active transport O diffusion, active transport QUESTION 3 signaling. QUESTION 4 and exit a cell by Compared to water-soluble signals, lipid-soluble signals are more likely to produce their effects on the target cell by: O activating enzymes at the plasma membrane O opening or closing ion channels altering transcription Opening potassium ion channels in a neuron will lead to the cell interior becoming: O less negative, which is hyperpolarization O less negative, which is depolarization more negative, which is hyperpolarization O more negative, which is depolarization

Gap junctions are involved in O endocrine O none of the other choices O neural O paracrine QUESTION 2 Potassium ions enter a cell by O active transport, diffusion O diffusion, diffusion O active transport, active transport O diffusion, active transport QUESTION 3 signaling. QUESTION 4 and exit a cell by Compared to water-soluble signals, lipid-soluble signals are more likely to produce their effects on the target cell by: O activating enzymes at the plasma membrane O opening or closing ion channels altering transcription Opening potassium ion channels in a neuron will lead to the cell interior becoming: O less negative, which is hyperpolarization O less negative, which is depolarization more negative, which is hyperpolarization O more negative, which is depolarization

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter9: Cell Communication

Section: Chapter Questions

Problem 1ITD

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At this point, go over your answers to the activit ies given earlier in this lesson before you fill out the table below. Table 20: Interdependence of Function and Fom in the Cell Membrane Which components of the cell membrane enable it to perform this function? Function of the Cell Membrane How do these components help the cell membrane in performing this function? iully control the passage of substances through its membrane. However, all activit ort, involve energy. This leads us to another characte As stated in the first section of this lesson, maintaining homeostasis requires ise this in powering
ab ock fn H QUESTION 11 What property of the voltage-gated potassium channels allows K ions to pass? O a. Two polypeptide subunits are synthesized when the membrane is depolarized, allowing K+ ions to pass. O b. Depolarization causes the subunits to temporarily disintegrate so that K* ions can pass through the membrane Oc. The voltage-gated potassium channels open when the polypeptide subunits are disinhibited O d. Depolarization causes the four polypeptide subunits specific to the voltage-gated K* channel to twist into a shape that allows K* ions to pass esc K← →→ QUESTION 12 Why does ACh slow the heart rate? O a. It stimulates muscarinic receptors that open potassium channels O b. It stimulates muscarinic receptors that close potassium channels O c. It stimulates nicotinic receptors that open potassium channels Od. It stimulates nicotinic receptors that close potassium channels per the core o Click Save and Submit to save and submit. Click Save All Answers to save all answers. ! Type…
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Flippases help maintain membrane asymmetry. True False
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