BIOLOGY (OER)
2nd Edition
ISBN: 2810023110482
Author: OpenStax
Publisher: MBS
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Textbook Question
Chapter 35, Problem 11RQ
Which of the following molecules is not involved in the maintenance of the resting membrane potential?
- potassium cations
- ATP
- voltage-gated ion channels
- calcium cations
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Sodium (Na*) and Potassium (K+) are equally distributed across the neuronal membrane at
resting membrane potential because of the:
O Unassisted passive diffusion across the membrane
O Nat/K+ Pump
O Nongated Channels
Voltage-gated Channels
Chemically-gated Channels
Which of the following is important in active transport of ions in neurons?
membrane channels
membrane pumps
membrane enzymes
gated-channels
Which of the following statements about voltage gated channels is true?
Voltage-gated sodium channels open at a higher (more positive) membrane potential than do potassium-gated channels
Voltage-gated sodium channels open at a lower (more negative) membrane potential than do potassium-gated channels
Sodium- and postassium-gated channels open at about the same membrane potential, but they have different effects because there are different numbers of the two kinds of channels in neuron cell membranes
Chapter 35 Solutions
BIOLOGY (OER)
Ch. 35 - Figure 35.3 Which of the following statements is...Ch. 35 - Figure 35.11 Potassium channel blockers, such as...Ch. 35 - Figure 35.26 Which of the following statements is...Ch. 35 - Neurons contain _____ which can receive_____...Ch. 35 - A(n)______neuron has one axon and one____ dendrite...Ch. 35 - Glia that provide myelin for neurons in the brain...Ch. 35 - Meningitis is a viral or bacterial infection of...Ch. 35 - For a neuron to fire an action potential, its...Ch. 35 - After an action potential, the opening of...Ch. 35 - What is the term for protein channels that connect...
Ch. 35 - Which of the following molecules is not involved...Ch. 35 - Thelobe contains the visual cortex frontal...Ch. 35 - Theconnects the two cerebral hemispheres. limbic...Ch. 35 - Neurons in Thecontrol motor reflexes. thalamus...Ch. 35 - Phineas Gage was a 19th century railroad worker...Ch. 35 - Activation of the sympathetic nervous system...Ch. 35 - Where are parasympathetic preganglionic cell...Ch. 35 - ______ is released by motor nerve endings onto...Ch. 35 - Parkinson’s disease is a caused by the...Ch. 35 - __________ medications are often used to treat...Ch. 35 - Strokes are often caused by. neurodegeneration...Ch. 35 - Why is it difficult to identify the cause of many...Ch. 35 - Why do many patients with neurodevelopmentaJ...Ch. 35 - How are neurons similar to other cells? How are...Ch. 35 - Multiple sclerosis causes demyelination of axons...Ch. 35 - Many neurons have only a single axon, but many...Ch. 35 - How does myelin aid propagation of an action...Ch. 35 - What are the main steps in chemical...Ch. 35 - Describe how long-term potentiation can lead to a...Ch. 35 - What methods can be used to determine the function...Ch. 35 - What are the main functions of the spinal cord?Ch. 35 - Alzheimer’s disease involves three of the four...Ch. 35 - What are the main differences between the...Ch. 35 - What are the main functions of the sensory somatic...Ch. 35 - Describe how the sensory-somatic nervous system...Ch. 35 - Scientists have suggested that the autonomic...Ch. 35 - What are the main symptoms of Alzheimer’s disease?Ch. 35 - What are possible treatments for patients with...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following is the correct statement regarding ion channels? Physical deformation of the membrane cannot open ion channels Ligand-gating means that an ion binds to the channel, which stimulates its opening. If the channel pore was the right size, Na and K could both pass through because they have the same charge A voltage gated Na channel can open to allow Na movement against its electrochemical gradientarrow_forwardWhich of the following ion channels are always sensitive to small changes in electric charge? stress-activated channels ligand-gated channels with extracellular ligands voltage-gated channels ligand-gated channels with intracellular ligands all of the abovearrow_forwardThe resting potential of most cells is most dependent concentration gradient of: on the transmembrane Chloride Sodium Potassium Calciumarrow_forward
- The membrane potential caused by differences in ions across the plasma membrane of an electrically excitable cell (when not stimulated) is called: action potential resting membrane potential graded potential local potentialarrow_forwardWhich of the following statements best describes the features of voltage-gated K+ channels? They consist of 4 subunits, are activated at the same time as voltage-gated Na+ channels, but do not inactivate. They consist of 4 subunits, are activated by depolarisation and close slowly during the refractory period. They have 24 membrane spanning alpha helices, 4 of which have positively charged amino acids which promote a conformational change in the channel following depolarisation. They consist of 4 subunits and are open at rest which causes the resting membrane potential to be close to the K+ equilibrium potential.arrow_forwardBinding of acetylcholine to postsynaptic membranes increases the conductance of Na+ into the cell. It is an example of Group of answer choices active transport voltage-gated channel ligand-gated channel passive transport symporterarrow_forward
- The above repolarization of a neuron will result in which of the following ionic currents? a potassium current will transport K+ ions out of the cytoplasm a sodium current will transport Na+ ions out of the cytoplasm a potassium current will transport K+ ions into the cytoplasm a sodium current will transport Na+ ions into the cytoplasm a sodium current will transport K+ ions into the cytoplasmarrow_forwardA cell has a membrane potential of -100 mV (more negative inside than outside) and has 1,000 times more calcium ions outside the cell than inside. Which best describes a mechanism by which Ca2+ enters this cell? facilitated diffusion of Ca2+ into the cell down its electrochemical gradient movement of Ca2+ into the cell through an ion channel down its concentration gradient passive diffusion of Ca2+ into the cell down its electrochemical gradient cotransport of Ca2+ into the cell with Cl- movement of Ca2+ into the cell through a carrier protein down its electrical gradient I know that the answer is 1 but please explain why. Thank you.arrow_forwardWhy is the resting membrane potential negative? Shouldn't it be positive as cells move in and out positive ionsarrow_forward
- How would you define the term "membrane potential." The ability of a cell to perform its specialized function. A voltage difference that exists across the outer and inner face of the plasma membrane. The possibility of a given cell activity being accomplished. Aaarrow_forwardWhich of the following is not an excitatory ligand-gated ion channel? NACHR AMPAR ASIC GABA-ARarrow_forwardThe interior of a neuron's plasma membrane at resting membrane potential will have a positive charge and contains less sodium than outside of the cell positive charge and contains more sodium than outside the cell negative charge and contains less sodium than outside the cell O negative charge and contains more sodium than outside the cellarrow_forward
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