PNS - EXAM 2 with 100% correct answers 2024

The spinal cord is part of what nervous system - answer-CNS Parts of the Spinal Cord - answer-8 Cervical 12 Thoracic 5 Lumbar 5 Sacral 1 Coccygeal What surrounds/protects the spinal cord - answer-the three maters of the brain go down the spinal cord Dorsal Root Ganglion - answer-carries sensory information through sensory unipolar neurons AFFERENT Ventral Root Ganglion - answer-motor multipolar neurons EFFERENT 2 Types of nerves - answer-1. spinal- majority of PNS nerves 2. cranial nerves- 12 Cranial nerve 1 - answer-Olfactory -sensory Cranial Nerve 2 - answer-Optic -sensory Cranial Nerve 3 - answer-Oculomotor -motor and sensory Cranial Nerve 4 - answer-Trochlear -motor and sensory Cranial Nerve 5 - answer-Trigeminal -motor and sensory Cranial Nerve 6 - answer-Abducens -motor and sensory Cranial Nerve 7 - answer-Facial -motor and sensory Cranial Nerve 8 - answer-Vestibulocochlear -sensory Cranial Nerve 9 - answer-Glossopharyngeal -motor and sensory Cranial Nerve 10 - answer-Vagus -motor and sensory Cranial Nerve 11 - answer-Accessory -motor and sensory Cranial Nerve 12 - answer-Hypoglossal -motor and sensory What is the number of the cranial nerves based on - answer-most anterior nerve to posterior nerve function of occulomotor nerve - answer-serves muscles of the eye function of the trochlear nerve - answer-serves the superior oblique eye muscle function of trigeminal nerve - answer--sensory from face to mouth -motor to muscles of chewing function of the abducens nerve - answer-serves the lateral rectus of the eye function of the facial nerve - answer-serves the muscles of facial expression, lacrimal glands and salivary glands function of vestibulocochlear nerve - answer-equilibrium and hearing function of glossopharyngeal nerve - answer-serves the pharynx for swallowing, posterior third of the tongue, parotid salivary gland function of the vagus nerve - answer-sensations from internal organs and parasympathetic motor regulation of internal organs function of the accessory nerve - answer-serves the muscles that move head, neck and shoulders function of hypoglossal nerve - answer-serves muscles of the tongue 2 parts of autonomic nervous system - answer-sympathetic and parasympathetic What do parasympathetic nerves do? - answer-rest and digest -constrict pupils -stimulate saliva -decrease heart beat -constrict airways -stimulate stomach and intestines and gallbladder -inhibit release of glucose -contract bladder What do sympathetic nerves do? - answer-fight or flight -dilate pupils -inhibit saliva -increase heart beat -relax airways -inhibit stomach and intestines and gallbladder -stimulate release of glucose *secrete epinephrine and norepinephrine -relax bladder