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which of the following is true for a toe corticospinal interneuron that produces action potentials during movements of the big toe of the left foota
at 1 am a researcher places a healthy squid giant axon in a bath of normal squid physiological extracellular saline and internally perfuses the axon
in a neuron at rest the membranea voltage will be less than zerob sodium conductance is greater than the membrane potassium conductancec voltage is
intracellular sodium concentration of the motor neurona complete motor neuron is removed from a frog and placed in normal physiological saline at 1
which of the following is true for a toe motor neuron that excites a toe muscle that moves the big toe in the right foota the cell body of the toe
which of the following is true for a g-proteina after the atp-ase of the alpha subunit of a g protein converts the atp bound to the alpha subunit to
which of the following is an active transport processa net flux of sodium across the plasma membrane via voltage-gated sodium channelsb net flux of
a normal healthy cell is bathed in a normal extracellular saline the plasma membrane of the cell contains voltage-gated sodium channels
an impermeable membrane separates a one liter solution of 1m nacl in the left compartment from a one liter solution of 2m kcl in the right
an impermeable membrane separates one liter of a 1m kcl solution in the left compartment from one liter of 1m nacl solution in the right
an impermeable membrane separates one liter of a 001 m glucose solution in water in the left compartment from one liter of a 01 m glucose solution in
in a properly functioning negative feedback system thea value of the controlled variable will always be very close to the threshold value when the
a decrease in blood plasma levels of calcium will lead toa an increase in the calcium ion excretion in the urineb an increase in the calcium ion
which of the following serves as an effector or part of an effector that functions in a negative feedback systema 125-dihydroxyvitamin d receptors
which of the following serves as an actuating signal or as part of an actuating signal in a positive feedback systema blood plasma levels of pth
which of the following serves as a sensor or as part of a sensor that functions only in a negative feedback system and not in a positive feedback
the av node of a mammalian heart is destroyeda a depolarization in a cell in the left atrium will cause a depolarization of a cell in the left
a decrease in parasympathetic discharge to the heart leads toa an increase in the conductance of f-channels in sa node cellsb a decrease in the
what are the parasympathetic neuronspatient a has a disease that has destroyed half of the alpha-adrenergic receptors on each of the smooth muscles
the axons of all the baroreceptors in the body were destroyed at 2 am all else is normal which of the following statements is true for the system
which of the following is true for active hyperemia a local control mechanism within the circulatory systema there will be a decrease in force
what is firing rate of carotid artery baroreceptorsat 100 am person xs blood pressure is equal to the blood pressure set point at 101 am there is
an increase in the calcium conductance of all sarcoplasmic reticulum membranes of a skeletal muscle with no external forces on it leads toa increased
when the overlap between the thin and thick filaments of a sarcomere in a skeletal muscle is decreasing thea total length of the i band minus the
which of the following is true in a skeletal musclea movement of the cross-bridge occurs only when the myosin head is detached from the actin