The Na^+-K^+ pumps of neutrons are active . during depolarization during repolar
ID: 66259 • Letter: T
Question
The Na^+-K^+ pumps of neutrons are active . during depolarization during repolarization to replace ions lost through leakage channels during hyperpolarization pretty much all the time A neutron has numerous dendrites for connections with many presymaptic neurons and one axon. Unipolar multipolar biaxial efferent afferent The central nervous system includes . the diencephalon the spinal cord the cranial nerves the spinal cord the spinal nerves The brain can tell "stronger" stimuli based on . the voltage of the action potential whether it makes an EPSP or and IPSP the rate of action potential firing(the number per millisecond) the duration of the action potential where it connects with the primary somatosensory cortex Stronger stimuli cause the neuron to start a new action potential during its relative refractory period during its absolute refractory period while K+ is entering the cell while the Na+ activation gates are open (a. and c.) Which of the following would tend to have the SLOWEST conduction velocity a thin bare neuron a thick bare neuron a thick myelinated neutron a thin myelinated neutron can't determine from this information The facilitated zone of a neuronal pool . only depolarizes due to temporal summation only depolarizes due to spatial summation always depolarizes after pre-synaptic EPSPs is a kind of parallel processing is usually unmyelinated The telencephalon comes from the primary brain vesicle called the . prosencephalonExplanation / Answer
9. Option E seems to be true, since in depolarization Na+ channels will be opened and in repolarization and hyperpolarization K+ cahnnels will be opened
10. Option B is true
11. Option E is true
12. Option C is true
13. Option E (A and C) is true (It lasts from return to resting membrane potential to after hyperpolarization- period in which unusually strong stimulus will trigger new action potential) During this period, an extra K+ conductance require since, the membrane is at a higher threshold and it require a greater stimulus to cause action potentials to fire.
14. Option A is true (we know that nonmyelinated neurons signal transmission is always slower than myelinated neurons, now the thickness or increased diameter of the neuron will increase the passive current flow via reducing internal resistance that leads to faster transmission of a signal. Hence, the thin and bare neurons is my option for slowest conductivity)
15. Option D seems to be true (Option A, B and C are associated with trigger zone not facilitated zone)
16. Option A is true