Hondros Bio 253 Exam 2 V1 (New 2024/ 2024 Update) Questions And Verified Answers| 100% Correct| Graded A

Cochlea {Ans: o Hearing organ o Coiled tube arising from anterior side of the vesituble o Contains three fluid filled canals separated by membranes}Tympanic Membrane {Ans: Ear Drum Suspended in ring shaped grove in temporal bone Vibrates freely in response to sound Very sensitive to pain}Glossopharyngeal nerve (CN IX) {Ans: -Sensory fibers to the tongue and carotid sinus -Somatic motor fibers to the pharynx -Parasympathetic fibers to the parotid salivary glands -Mixed}The middle, or vascular layer of the eyeball, is mostly made up of the choroid coat, a pigmented tissue that absorbs light so there is minimal internal reflection in the eyeball. The front of this layer contains the _________ which controls the size of the pupil, and the__________ which holds and shapes the lens for accommodation to near or distant vision. {Ans: iris,ciliary body}the spinal cord begins at the _________ ___________ of the skull and ends at the _________ ________________, around L1 or L2 vertebrae {Ans: foramen magnum, conus medullaris}Nerve impulse conduction {Ans: -The Na+ from the depolarization diffuses away from the site of entry, depolarizing adjacent regions -trigger voltage-gated Na+ channels in the next segment of the axon open -each set of