MPP 3202 Prelab 4 Study Guide Test.
Na+, K+ - CORRECT ANSWER Primary active transport uses the energy obtained from cleaving ATP to pump _____ ions out of the cell and _____ ions into the cell.
false - CORRECT ANSWER True or False. As soon as there is a large concentration gradient of an io...
Na+, K+ - CORRECT ANSWER Primary active transport uses the energy obtained from cleaving ATP to
pump _____ ions out of the cell and _____ ions into the cell.
false - CORRECT ANSWER True or False. As soon as there is a large concentration gradient of an ion, the
ion immediately flows back down its concentration gradient.
low; higher - CORRECT ANSWER In a resting cell, the membrane permeability to sodium is: low or high
_____ and the membrane permeability to potassium is: higher than or lower ______than sodium .
cation, less - CORRECT ANSWER If a positively charged ion, a ______ , moves into a cell, the membrane
potential will become less or more _____ negative. If a negatively charged ion , an anion moves into the
cell, the membrane potential will become more negative.
ligand, voltage - CORRECT ANSWER Ion channels can be open or closed by different types of gating
signals. A channel that is open or closed by a molecule binding the channel is called a ______gated
channel. A channel that is opened or closed by a specific change in voltage is called a ______gated
channel.
voltage - CORRECT ANSWER Activation or opening of ________ gated sodium channels located along a
neuronal cell can send a signal all the way from a sensory receptor neuron all the way to the central
nervous system or the brain.
true - CORRECT ANSWER True or False. Action potentials can rapidly send a signal along the entire length
of a neuronal axon.
anion - CORRECT ANSWER negatively charged molecules (ions) for example chloride and bicarbonate
cation - CORRECT ANSWER positively charged molecules (ions) for example sodium and potassium
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