BIBC Week 9 Thomas

BIBC Week 9 Thomas - Answer Sheet for Week Nine Handout:...

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Answer Sheet for Week Nine Handout: Na+K+ ATPase Pump: 1. 3, exiting, 2, entering. 2. False, this is a primary transport pump that uses atp to drive both ions against their gradients. 3. Digitalis. It blocks the Na+K+ ATPase and causes an excess build up of Na+ ions inside the cell membrane. This excess build up of Na+ inside the membrane prevents the proper functioning of the Na+Ca2+ antiport protein and causes a build up of Ca2+ ions inside the membrane. Since Ca2+ is used to signal contraction of muscles, the excess Ca2+ can increase heart rate. 4. False, 25% of the energy goes towards this pump. Calcium Transporter: 1. Acetycholine. 2. Calcium binds to troponin which causes release of tropomyosin from myosin binding site on actin. This allows binding of myosin to actin and contraction to occur. 3. The M domain contains transmembrane helices and Ca2+ binding sites located near the middle of the membrane bilayer. Asp and Glu forms the binding for the Ca2+ ions. This
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This note was uploaded on 04/29/2010 for the course PSYCH PSYCH 179 taught by Professor Koob during the Fall '09 term at UCSD.

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BIBC Week 9 Thomas - Answer Sheet for Week Nine Handout:...

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