40) 40) Which of the following stimull will NOT initiate a response in the RAAS, or in vasopressin secretion, or in any

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40 40 Which Of The Following Stimull Will Not Initiate A Response In The Raas Or In Vasopressin Secretion Or In Any 1 (59.27 KiB) Viewed 44 times

40) 40) Which of the following stimull will NOT initiate a response in the RAAS, or in vasopressin secretion, or in any other feedback system designed to respond to low blood pressure? A) low atrial stretch (low blood volume) B) high osmolarity (above 300 mOsm) C) low osmolarity (below 280 mOsm) D) decreased baroreceptor signalling 5 41) 41) If a maximal efferent signal loaves the primary motor cortex and travels down the spinal cord into the ventral gray matter, which of the following motor units will likely be activated last? A) motor unit with the largest # of muscle fibers and a motor neuron with the highest threshold B) motor unit with the largest of muscle fibers and a motor neuron with the lowest threshold C) motor unit with the fewest # of muscle fibers and a motor neuron with the highest threshold D) motor unit with the fewest # of muscle fibers and a motor neuron with the lowest threshold 42) 42) Which of the following sequences accurately describes the process of ACh release at the NMI? A) Ca++ stimulates ACh vesicle exocytosis, Ca* diffuses into axon terminal Ach binds to the nicotinic Ach receptors at the motor end plate: Action potential in the motor neuron reaches the axon terminal voltage-gated Cat channels open B) ACh binds to the nicotinic ACh receptors at the motor end plate Cat* diffusos into axon terminal voltage-gated Ca*+ channels open: Action potential in the motor neuron reaches the axon terminal: Cat+ stimulates ACh vesicle exocytosis C) Ca++ diffuses into axon terminal; voltage-gated Cat channels open: Action potential in the motor neuron reaches the axon terminal Ca++ stimulates ACh vesicle exocytosis. Ach binds to the nicotinic ACh receptors at the motor end plate D) Action potential in the motor neuron reaches the axon terminal voltage-gated Cat+ channels open Cat+ diffuses into axon terminal Cat stimulates ACh vesicle exocytosis: Ach binds to the nicotinic ACh receptors at the motor end plate