Neurons with their conductile regions in the decussation of the pyramids have their input regions in the:

There are cells in the central nervous system that contain proteins that remove glutamate from the extracellular space. Where would you expect to find these proteins predominately located?

In the central nervous system, an action potential would likely be generated at the trigger zone by:

(10 points) Tetanus toxin enters the output regions of motor neurons by endocytosis. The resulting vesicles are transported toward the neuronal cell body on by the end directed motor protein, called . When the vesicle reaches the motor neuron cell body, it is released from this neuron by exocytosis and taken up by endocytosis into inhibitory interneurons. In these interneurons, tetanus toxin destroys VAMP (synaptobrevin), which has alpha helices that span the membrane of . The destruction of VAMP prevents it from winding together with the transmembrane protein and the membrane-associated protein to form the complex. This prevents release of neurotransmitter from the output region of this interneuron and ultimately prevents the opening of channels (be specific for ion type) in the postsynaptic cell. Despite the destruction of VAMP, Ca2+ still enters the cell through calcium channels and binds to on the vesicle membrane.

Which cell type would you expect to have the most active lipid synthesis in the centralnervous system?

Guillain Berré syndrome is a demyelinatig disease in the peripheral nervous system. You would expect the cell type affected by this disease to be:

Destroying neurons in the dorsal (posterior) root ganglia would immediately kill:

(10 points) In muscle, which lacks obvious , Ca2+ enters the cell through Ca2+ channels and binds to on the SR to increase intracellular Ca2+. These ions then bind to , an evolutionary ancestor of troponin C, which activates . This enzyme then phosphorylates one of the two attached to myosin. This phosphorylation changes the position of the so that it can reach the thin filament which is made of polymerized . Contraction in this muscle type ends when an enzyme called a removes the phosphate group that had been added to the answer in Blank #7.

Where would you find a high concentrations of nucleic acids?

At what point in the accompanying diagram are the intracellular and extracellular Na+concentrations the same?