COGS 17 Lectures 2a - 2b Questions
All Solved Correctly.
Soma - Answer The cell body
Mitochondria - Answer Source of energy to power metabolic activity
Membrane - Answer Built of bilayer of phospholipid molecules
Ribosomes - Answer Use RNA instructions to build proteins
Nucleus - Answer Site of Dna
Astrocytes - Answer Provide nutrients to & recycle from neurons
Radial Glia - Answer Guide the migration of neurons during fetal development
Schwann Cells - Answer Myelinate cells in the PNS
Microglia - Answer remove toxins
olgiodendrocytes - Answer Arms insulate neurons in the CNS
Ependymal Calls - Answer Line the ventricles, oozing CSF
Glioma - Answer Runaway regeneration (brain tumor)
Axon - Answer Single branch, carrying signal that leads to release of NT
Terminal - Answer Where exocytosis occurs
Dendrites - Answer Multiple branches, for recieving input from other cells
Ion gates - Answer Pores in the cell membrane, that control the out/influx of ions
, Diffusion - Answer A difference in the number ions, of a given type, inside vs. outside the cell
Concentration Gradient - Answer Random motion of molecules, that results in their
spreading to equally fill a space
Electrical Gradient - Answer A difference in the net (summed) charge, inside vs. outside the
cell.
Electrostatic Pressure - Answer The repulsion between like charges - e.g. positive repels
positive.
Polarized - Answer When there is a significant difference in charge, across the membrane
Na+ - Answer Greater concentration outside of cell
K+ - Answer Greater concentration inside of cell
-70mV - Answer Difference in charge across membrane
Na+ - Answer Sodium-Potassium Pump collects 3 of these ions, for each 2 of the other type
that it ejects
T/F of Action Potential : Always begins at the "Axon Hillock" - Answer True
T/F of Action Potential: First Na+ leaves the cell. - Answer False
T/F of Action Potential: The movement of Sodium ions results in a local depolarization, to about
+50mV - Answer True
T/F of Action Potential: Next K+ leaves the cell. - Answer True
T/F of Action Potential: The movement of Potassium ions results in a shift in polarization to
about -70mV. - Answer False
T/F of Action Potential: When an influx of K+ reaches the end of the axon, the cell will fire. -
Answer False
All Solved Correctly.
Soma - Answer The cell body
Mitochondria - Answer Source of energy to power metabolic activity
Membrane - Answer Built of bilayer of phospholipid molecules
Ribosomes - Answer Use RNA instructions to build proteins
Nucleus - Answer Site of Dna
Astrocytes - Answer Provide nutrients to & recycle from neurons
Radial Glia - Answer Guide the migration of neurons during fetal development
Schwann Cells - Answer Myelinate cells in the PNS
Microglia - Answer remove toxins
olgiodendrocytes - Answer Arms insulate neurons in the CNS
Ependymal Calls - Answer Line the ventricles, oozing CSF
Glioma - Answer Runaway regeneration (brain tumor)
Axon - Answer Single branch, carrying signal that leads to release of NT
Terminal - Answer Where exocytosis occurs
Dendrites - Answer Multiple branches, for recieving input from other cells
Ion gates - Answer Pores in the cell membrane, that control the out/influx of ions
, Diffusion - Answer A difference in the number ions, of a given type, inside vs. outside the cell
Concentration Gradient - Answer Random motion of molecules, that results in their
spreading to equally fill a space
Electrical Gradient - Answer A difference in the net (summed) charge, inside vs. outside the
cell.
Electrostatic Pressure - Answer The repulsion between like charges - e.g. positive repels
positive.
Polarized - Answer When there is a significant difference in charge, across the membrane
Na+ - Answer Greater concentration outside of cell
K+ - Answer Greater concentration inside of cell
-70mV - Answer Difference in charge across membrane
Na+ - Answer Sodium-Potassium Pump collects 3 of these ions, for each 2 of the other type
that it ejects
T/F of Action Potential : Always begins at the "Axon Hillock" - Answer True
T/F of Action Potential: First Na+ leaves the cell. - Answer False
T/F of Action Potential: The movement of Sodium ions results in a local depolarization, to about
+50mV - Answer True
T/F of Action Potential: Next K+ leaves the cell. - Answer True
T/F of Action Potential: The movement of Potassium ions results in a shift in polarization to
about -70mV. - Answer False
T/F of Action Potential: When an influx of K+ reaches the end of the axon, the cell will fire. -
Answer False
