Hondros BIO 253 Quiz 4 (2024/2025) Answered Correctly – Expert Verified | Latest Version

________ pairs of cranial nerves and _________ pairs of spinal nerves connect the central nervous system with body organs and tissues. - Twelve; 31 _________ results when light rays are focused in front of the retina - Nearsightedness ____________ form the linings of the cavities in the brain and spinal cord. - Ependymal cells . ________ are the sensory receptors for pain. - Free nerve endings . ________ fills the space between the arachnoid mater and the _________. - Cerebrospinal fluid; pia mater . A nerve impulse is formed when a neuron's _________ becomes permeable to _______ ions, and the sudden inflow of these ions depolarizes the neuron's plasma membrane. - plasma membrane; sodium A relatively short time after a woman applies her perfume she becomes unable to detect the scent. Why does this occur? - Olfactory receptors have become adapted and no longer form impulses. Chemoreceptors for taste are _________, which can only detect chemicals that are _________ in a liquid. - taste cells; dissolved