10- A selective beta 1 antagonist used in emergency to reduce the hypertensive crisis is: a. Atropine b. Esmolol c. Acetylcholine d. Furosemide

12.  Magnesium only blocks the pore of the NMDA receptor when the neuron is very depolarized. a. True b. False

e. antigens. 57. As far as its role in negative feedback and maintaining homeostasis goes, the nervous system has the most in common with which of the following utilities a. Waste Management (which picks up garbage, compost, and recycling) b. AT&T (which ensures communication from your home to other locations) c. EBMUD (which delivers drinking water and treats wastewater) d. PG&E (which provides energy to your house) to We do Our to

8. Describe the differences between ionotropic and metabotropic signaling in the brain with respect to receptor properties and duration

3.single choice Which part of the nervous reflex is fatigable. A. synapse B. sensory receptors C. afferent neuron D. efferent neuron E. effector 4.multiple choice The factors that influence the AP conduction velocity on nerve fiber include A. thickness of the myelin shealth. B. myelinated or not C. diameter of the fiber D. temperature E. strength of the stimulation 5.single choice Which property could be destroyed by the local anesthetics procaine (普鲁卡因). A. physiological integrity B. structure integrity C. insulation D. infatigable 6.single choice Which of the following is not the chemical mediated signal transmission. A. gap junction B. neuro-muscular junction. C. hormone binding with the receptor on the target. D. classical synapse E. varicosity 7.single choice In the nerve reflex, the latency from the stimulation to the response is mainly dependent on A. the number of synapses in the central nervous system. B. the action potential…

18.  Studies have shown that oxytocin acts as an "anti-social" hormone in humans, promoting aggression and avoidance. a. True b. False

Please ASAP. Thank u. 1. What characterizes the difference between confirming an established hypothesis and opposing it? a. Opposing an established hypothesis is associated with pleasure and elicits dopamine b. Confirming an established hypothesis engages circuits in the amygdala c. Opposing an established hypothesis engages circuits in the reward part of the brain d. Confirming an established hypothesis engages circuits in the reward part of the brain   2. What is an example of irrational fear? a.Fear of salamanders b.Worry about having an automobile accident c.Fear of tornadoes d.Fear of getting sick

1%Y l. . " C O 1::YV A docs.google.com/forms/d/e c. Size of Fibers Stimulated d. Frequency of Stimulation e. Degree of Muscle Stretch Norepinephrine affect on smooth muscle * :and causes a. membrane potential becomes larger O b. increase tone c. Decrease tone d. increase intracellular calcium ion e. the spikes become more frequent f. a and c RBC are exposed to a series of saline (NaCI) .solutions with decreasing dilution True False In sustained contraction muscle runs out of

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3. One issue with a nACh receptor competitive antagonists like Curare is if they leak away from the site of injection, they can have side effects. One side effect is ganglionic block, where Curare is inhibiting autonomic ganglion function. 1. Explain why having Curare in the ganglion of the autonomic system would be a problem. In particular, it can cause low blood pressure which occurs when blood vessels of the body relax (vasodilate). 2. Explain how most blood vessels of the body normally keep their shape or contract and which division in particular of the autonomic system would be affected by Curare to cause low blood pressure.