Part A What is an inhibitory neurotransmitter? Inhibitory neurotransmitters, like GABA, decrease the activity of the receptors, stimulating the ability of nerve cells to send signals to nearby norve cells. Inhibitory neurotransmitters, like GABA, increase the activity of the receptors, stimulating the ability of nerve cells to send signals to nearby nerve cells. Inhibitory neurotransmitters, like GABA, decrease the activity of the receptors, inhibiting the ability of nerve cells to send signals to nearby nerve cells. None of the above Submit Request Answer

Part A What is an inhibitory neurotransmitter? Inhibitory neurotransmitters, like GABA, decrease the activity of the receptors, stimulating the ability of nerve cells to send signals to nearby norve cells. Inhibitory neurotransmitters, like GABA, increase the activity of the receptors, stimulating the ability of nerve cells to send signals to nearby nerve cells. Inhibitory neurotransmitters, like GABA, decrease the activity of the receptors, inhibiting the ability of nerve cells to send signals to nearby nerve cells. None of the above Submit Request Answer

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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The Na"/glucose symport transports glucose from the lumen of the small in- testine into cells lining the lumen. Transport of 1 glucose molecule is directly coupled to the transport of 1 Na* ion into the cell. 1 Na"out + 1 glucose,ut→1 Na¨m+1 glucose. Assume the following conditions at 37 °C: [Na"Jm = 12 mM, [Na"Jout =145 mM, [glucose]out =28 µM, and A =-72 mV (inside negative). (a) What is AG for transport of Na* from outside to inside under these conditions? (b) What is the upper limit for [glucose], under these conditions? (c) Which of the two hypothetical symports shown below (A or B) would achieve the highest concentration of [glucose]n under the conditions described above? Briefly explain your choice. A: 1 Na"out +2 glucoseut + 1 Na" in +2 glucosen B: 2 Na 1+1 glucoseut → 2 Na in +1 glucosen out
Sperm need significant amounts of ATP to fuel their travel through the reproductive tract. This ATP is generated via oxidative metabolism of the glucose and fructose contained in the seminal fluid. These sugars are large polar molecules that enter sperm cells via glucose transporters or GLUTS. One such GLUT protein is depicted in the image below. When GLUTS recognize and bind glucose, they undergo a conformational change releasing glucose on the other side of the membrane. Due to the persistent high energy demands of the sperm cell, these sugars are continually being catabolized (broken down). GLUTs mediate what type of transport of glucose and fructose across the membrane? ________________ Is this an active or passive process? _________________ What type of transport protein are the GLUTs described in this question? ___________________ How many transmembrane domains does this GLUT have? _______________