QUESTION 1 Ion pumps.. DA Use the energy of ATP hydrolysis to move ions against their concentration gradient |B: Are directly responsible for the movement of an action potential down a neuronal axon |C. Can only move ions in a single direction Couple the vectorial movement of ions to a chemical reaction

QUESTION 1 Ion pumps.. DA Use the energy of ATP hydrolysis to move ions against their concentration gradient |B: Are directly responsible for the movement of an action potential down a neuronal axon |C. Can only move ions in a single direction Couple the vectorial movement of ions to a chemical reaction

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter4: Principles Of Neural And Hormonal Communication

Section: Chapter Questions

Problem 3SQE

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A characteristic of carrier molecules in a primary active transport pump is that: a. they cannot transport a substance and also hydrolyze ATP. b. they retain their same shape as they perform different roles. c. their primary role is to move negatively charged ions across membrances. d. they move Na+ into a neural cell and K+ out of the same cell. e. they act to establish an electrochemical gradient.
location are corn Question 74 In active transport solute mo O True
2. Na+ K+ CI A™ The diagram below shows two electro-neutral solutions separated by a membrane. Other ions were omitted from the diagram. All concentrations are mM. A is a large impermeant anion. ABCDE A. B. C. D. OUT Assume the membrane becomes equally permeable to K+ and Cl-, and is impermeable to all other solutes. The value of the membrane potential then become approximately E. 100 10 100 0 IN 10 100 10 100 0 mV 60 mV (inside negative) 60 mV (inside positive) 90 mV (inside negative) 90 mV (inside positive)
Imagine that you are working with isolated mitochondria and you manage to double the ratio of protons outside to protons inside. In order to maintain the overall Gat its original value (whatever it is), how would you have to change the mitochondria membrane potential?
The rate at which the Na+K+ pump operates is not constant but is controlled by a combined effect of changes in ICF Na+ concentration and ECF K+ concentration. Do you think the changes in both ICF Na+ and ECF K+ concentration following a series of action potentials in a neuron would accelerate, slow down, or have no effect on the Na+K+ pumps in this cell?
Question 4 What process results in an increase in entropy? O Primary active transport O Secondary active transport O Pumping O Passive transport F2 F3 F4 F5 F6 F7 F8 F9 F10 $ & 4 7 8. W Y U CO
ans fast I will upvote A sample of PbSO4 solid has reached equilibrium in a beaker of water. If the ionic strength of the solution is then increased by adding LINO3 salt what happens to the activity coefficients of the Pb+2 and what happens to the solubility of the PbSO4 choose the option and explain the activity coefficient will increase and the molar solubility will decrease Both activity coefficient the molar solubility will decrease the activity coefficient will decrease and the molar solubility will increase Both activity coefficient the molar solubility will increase
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…
hat can scientists learn about ion channels from studying them using the patch-clamp method? O That channels switches back and forth between open &closed conformations O all of these O What particular conditions will tend to open a channel OWhich ion can pass through a particular channel
b pdf.01# 9 s -> 1 BIO( علوم حياتية عامة لطلبة الكليا Which of the following processes includes all the others? O a. Facilitated diffusion O b. Passive transport Oc Osmosis O d. Diffusion Clear my choice 2 ) 1 1 BIO( علوم حياتية عامة لطلبة الكل
A Moving to another question will save this response. Question 73 ATP is used by cells for all of the following except din intracellular movement (e.g. vesicular transport) anabolic reactions catabolic reactions transport solutes across the plasma membrane muscle contraction A Moving to another question will save this response. DEC MacBook Air 20 O00 000 F1 F2 F3 F4 F5 F6 23 2 3 4 6
Which among the following statements is correct? Negatively-charged proteins are eluted out first when a cation exchanger is used as the stationary phase for ion- exchange chromatography O Proteins that have higher affinity to the ligands are eluted out last in affinity chromatography O Both statements are correct O Both statements bre incorrect