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consider a properly functioning positive feedback system whose output variable is not equal to plateau at 100 am at 100 ama when the value of
in a properly functioning negative feedback systema value of the controlled variable will always be very close to the threshold value when the system
a new drug named antag-casr has been developed that is an antagonist at calcium-binding sites of casrs calcium-sensing receptors in the plasma
a new drug named agon-casr has been developed that is an agonist at calcium-binding sites of casrs calcium-sensing receptors in plasma membranes of
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 system with feedback either positive feedback or negative
which of the following serves as a sensor or as part of a sensor that functions in a positive feedback systema casrs calcium-sensing receptors
which of the following serves as an effector or as part of an effector that functions in a negative feedback systema nicotinic acetylcholine
which of the following serves as an actuating signal or as part of an actuating signal in a negative feedback systema action potentials in
which of the following is true for active hyperemia a local control mechanism within the circulatory systema there will be an increase in force
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
a decrease in parasympathetic discharge to the heart leads toa a decrease in the conductance of f-channels in sa node cellsb an increase in the
an increase in the calcium conductance of all sarcoplasmic reticulum membranes of a skeletal muscle with no external forces on it leads toa an
for a sarcomere of a skeletal muscle define the following terms a is the length of the a band h is the length of the h zone i is the total length of
illustrate the thin and think filaments in the muscle fibera healthy skeletal muscle fiber is isolated and has no external forces on it it has
atp is directly required in which of the following processes in musclea net flux of sodium ions from intracellular space to extracellular spaceb
define the skeletal musclea binding of calcium ion to its receptor site on the actin molecule blocks the attachment of the head of the tropomyosin
healthy person x is walking on level ground which of the following is true for the knee extensor muscle of xs right leg during the step cyclea
state about membrane- ning molecule neuron a is a healthy neuron with all the usual ion channels and with all the usual intracellular and
what is neurotransmitter consider neuron b in the frog central nervous system whose plasma membrane has a previously unknown channel that is
determine the change in the amount of intracellular chloridecomplete motor neuron is removed from a frog and placed in a large volume of normal
illustrate nernst equilibrium potential for potassium ions a complete motor neuron is removed from a frog and placed in normal physiological saline
what is frog central nervous systemconsider neuron b in the frog central nervous system whose plasma membrane has a newly discovered ligand-gated
right-handed adult patient x with a complete transection of the corpus callosum is presented with a simple written question in xs right visual field
z is a healthy adult female who ovulates in each menstrual cycle z is not pregnant during zs menstrual cycle high blood plasma levels of