{"id":1764,"date":"2020-07-11T09:45:33","date_gmt":"2020-07-11T09:45:33","guid":{"rendered":"https:\/\/murreeroad.org\/Biology10\/?p=1764"},"modified":"2020-07-12T14:30:11","modified_gmt":"2020-07-12T14:30:11","slug":"q-6-explain-peripheral-nervous-system-pns-in-detail","status":"publish","type":"post","link":"https:\/\/murreeroad.org\/Biology10\/q-6-explain-peripheral-nervous-system-pns-in-detail\/","title":{"rendered":"Q.6 Explain Peripheral Nervous System (PNS) in detail."},"content":{"rendered":"

Q.6 Explain Peripheral Nervous System (PNS) in detail.<\/strong>
\nAnswer:<\/strong>
\nPERIPHERAL NERVOUS SYSTEM (PNS) Components of PNS: <\/strong>
\nThe PNS is composed of nerves and ganglia.
\nGanglia <\/strong>
\nGanglia are the clusters of neuron cell bodies outside the nervous system.
\nNumber of cranial and spinal nerves. <\/strong>
\nHumans have 12 pairs of cranial nerves and 31 pairs of spinal nerves.”
\nTypes of nerves <\/strong>
\nSome cranial nerves are sensory, some are motor and some are mixed. On the other hand, all spinal nerves are mixed nerves.
\nPathways in PNS formed by Nerves <\/strong>
\nThe cranial and spinal nerves make two pathways: Sensory pathway which conducts impulses from receptors to CNS.
\nMotor pathway which conducts impulses from CNS to effectors. Systems of Motor pathway:
\nMotor Pathway makes two systems:
\n1. Somatic Nervous system <\/strong>
\nIt is responsible for the conscious and voluntary actions. It includes all of the motor neurons that conduct impulses from CNS to skeletal muscles.
\n2. Autonomic Nervous System <\/strong>
\nIt is responsible for the activities, which are not under conscious control. It consists of motor neurons that send impulses to cardiac muscles, smooth muscle and glands. Types of autonomic Nervous system .
\nAutonomic nervous system comprises of sympathetic system and parasympathetic system.<\/p>\n

(i) Sympathetic nervous system<\/strong>
\nThis system prepares body to deal with emergency situations. This is often called the fight or flight responses. During an emergency situation, this system takes necessary actions. For example; it dilates pupils, accelerates heartbeat, increases breathing rate and inhibits digestion.<\/p>\n

(ii) Parasympathetic nervous system <\/strong>
\nWhen stress ends, the parasympathetic nervous system takes action and normalizes all the functions. It causes pupil to contract, promotes digestion, and slows the rate of heartbeat and breathing rate.<\/p>\n

\"brain<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Q.6 Explain Peripheral Nervous System (PNS) in detail. Answer: PERIPHERAL NERVOUS SYSTEM (PNS) Components of PNS: The PNS is composed of nerves and ganglia. Ganglia Ganglia are the clusters of neuron cell bodies outside the nervous system. Number of cranial and spinal nerves. Humans have 12 pairs of cranial nerves and 31 pairs of spinal… Read More »Q.6 Explain Peripheral Nervous System (PNS) in detail.<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[23],"tags":[],"_links":{"self":[{"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/posts\/1764"}],"collection":[{"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/comments?post=1764"}],"version-history":[{"count":6,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/posts\/1764\/revisions"}],"predecessor-version":[{"id":1779,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/posts\/1764\/revisions\/1779"}],"wp:attachment":[{"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/media?parent=1764"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/categories?post=1764"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/tags?post=1764"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}