What is an example of receptor/ligand binding? O Simple diffusion O A hormone binding to a receptor O None of these is correct O Facilitated diffusion O Active transport

The binding of sodium ions (Na+) to a membrane protein is one of the first steps in initiation of the sodium-potassium pump that moves these ions across the membrane. The picture shows the inital set up in this process. How does the protein get the energy needed to continue the process of moving the (Na+) across the cell membrane? Membrane Protein ONa+ Inside the Cell A. O O Nat oc Outside the Cell Con Mitochondria will attach to the protein and provide the energy to push the Na+ through the protein. Energy from ADP is released and a channel in the membrane protein permanently B. opens, resulting in the passage of the Nat. Energy produced from the difference in solute concentration on both sides of the O c. membrane pulls the Na+ through the protein. Con с ATP attaches to the protein and releases a phosphate, making energy available to OD. change the shape of the protein and allowing the passage of the Nat.

What causes NMDA receptors to open? Glutamate binding and depolarization of the membrane Glutamate binding O Depolarization of the membrane O GABA binding

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If a skeletal muscle has depleted its stores of ATP how will the altered transport properties of the following transporters affect cytosolic ion concentrations (increase, decrease, no change) relative to normal?   Skeletal Muscle Cell With Depleted ATP Stores Ion transporter Cytosolic K+ Cytosolic Na+ Cytosolic Ca2+ NKA         NCX         SERCA

What is a synaptic vesicle? O Itis a membrane-bound package of neurotransmitters located in the pre-synaptic cell. It is a package of excitatory ions located in the post-synaptic cell. O t is a package of inhibitory ions located in the post-synaptic cell. O It is an organelle that stores calcium.

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In muscle, calcium moves from the cytoplasm to the sarcoplasmic reticulum by O active transport, ion channels using diffusion, pumps O diffusion, ion channels active transport, pumps

What type of protein opens when the membrane depolarizes, such as when an action potential moves along the membrane?     ligand-gated channels     voltage-gated channels

Which type of membrane transporter requires a gradient to move molecules across the membrane? O Voltage-gated channels Leak channels O Ligand-gated channels All of the above require a gradient O None of the above require a gradient