Peripheral Nervous System (PNS)
Peripheral Nervous System
- Peripheral nervous system (PNS) includes all those Sympathetic nervous system: It controls nerve cells and nerve fibers that connect central nervous system to out body parts. Peripheral nervous system is divided into somatic nervous system (SNS) and autonomic nervous system (ANS). Autonomic nervous system is further divided into sympathetic and parasympathetic nervous system. PNS connects central nervous system and different parts of our body. It receives information from sense organs and sends it to brain and carries back the motor responses to muscles, glands and related body parts.
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Important Points of Human Behavior :-
- “Inthis chapter, the relation of human behavior and biology is described.”
- The cell is the basic unit of human body. Many cells form tissue, many tissue to organ, many organs to organ systems are formed. These organ systems perform specific functions of our body. Nerve cell is the basic and smallest unit of nervous system. It is also called neuron.
- Nerve cells are of three types on the basis of functions: Sensory, motor and association neurons.
- Nerve cells perform the function of transmitting information in our body.
- Nervous system is of two types: Central Nervous System and Peripheral Nervous System.
- Central Nervous system consists of brain and spinal cord.
- Peripheral nervous system is divided in two parts somatic nervous system and autonomic nervous system.
Human Behavior Questions and Answers
1. Which part of nerve cell contains nucleus?
A Axon
B. Soma
C. Myelin Sheath
D. Nodes of Ranvier
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Answer :- ( B )
2. Which part of nerve cell increases the speed of nerve conduction?
A Myelin Sheath
B. Dendrites
C. Thalamus
D. Pons
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Answer :- ( A )
“3. Which part of brain controls activities like eating, drinking, sleeping, temperature regulation and sexual arousal?”
A Pons
B. Cerebellum
C. Hypothalamus
D. Thalamus
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Answer :- ( C )
4. How many pairs of cranial nerves are there in human brain?
A. 6
B. 10
C. 12
D. 31
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Answer :- ( C )