Bio 251 Exam 2 77 Questions And Correct Answers Latest (Verified Answers)

varicosities {Ans: released in response to action potential in postganglionic neuron}What phase of the cardiac cycle is the heart in when ventricular pressure is building but is not yet great enough to push the blood out of the ventricles {Ans: isovolumetric contraction}two major types of photoreceptors in the retina {Ans: rods and cones}which type of autonomic neuron originates in the CNS {Ans: preganglionic}afferent neurons {Ans: carry impulse towards CNS. senses}b2 adrenergic receptors {Ans: located in some blood vessels and sooth muscle usually, inhibitory greater affinity for epinephrine than norepinephrine}