BIO 212 Exam 5 Questions and Answers Fully Solved Latest Version

BIO 212 Exam 5 Questions and Answers Fully Solved Latest Version The basic Nervous system - Answers includes sensory information, an integrating center and effectors most of the neurons in the human brain are - Answers interneurons The nucleus and most of the organelles in a neuron are located in the - Answers cell body What type of neuron exists entirely within the central nervous system (CNS)? - Answers interneuron The operation of the sodium potassium "pump" moves - Answers sodium ions out of the cell and potassium ions into the cell The membrane potential in which there is no net movement of the ion across the membrane is called the - Answers equilibrium potential ATP hydrolysis directly powers the movement of - Answers Na+ out of cells The "selective" of a particular ion channel refers to its - Answers permitting passage only to a specific ion A common feature of action potential is that they - Answers are triggered by a depolarization that reaches the threshold potential If you experimentally increase the concentration of K+ inside a cell while maintaining other ion concentrations as they were, what would happen to the cell's membrane potential? - Answers The membrane potential would become less negative If the activity of the sodium potassium pump was completely stopped, what would happen to the neuron's membrane potential? - Answers slow rise in membrane potential a common feature of action potential is that they - Answers are triggered by a deporlarization that reached the threshold potential If you experimentally increase the concentration of K+ inside a cell while maintaining other ion concentrations as they were, what would happen to the cell's membrane potential? - Answers The membrane potential would become less negative. If the activity of the sodiumpotassium pump was completely stopped, what would happen to the neuron's membrane potential? - Answers slow rise in membrane potential Which of the following statements about action potentials is correct? - Answers Action potentials are propagated down the length of the axon. Which type of neuron passes signals from on neuron to another? - Answers interneuron in a neuron at rest, which statement accurately describes the relative concentrations of ions - Answers At rest, K+ has a relatively high concentration and Na+ and Cl- have relatively low concentrations on the inside of the neuron. What is the correct sequence of events during an action potential? - Answers Depolarization, repolarization, hyperpolarization A toxin that binds specifically to voltage-gated sodium channels in axons would be expected to _____. - Answers prevent the depolarization phase of the action potential Why are action potentials usually conducted in one direction? - Answers The brief refractory period prevents reopening of voltage-gated Na+ channels. A neurophysiologist is investigating nerve reflexes in two different animals: a crab and a fish. Action potentials are found to pass more rapidly along the fish's neurons. What is the most