Unit 9: Human Regulation and Reproduction
Learning Aim-A: Understand the interrelationship and nervous control of the
cardiovascular and respiratory systems
TITLE-Regulation of the cardiovascular and respiratory systems
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The nervous system
The spinal cord, brain, and a network of neurones make up the nervous system. The brain and spinal
cord are the central nervous system's two principal organs, receiving, transmitting, and processing
information from the entire body. Sensory cells in the peripheral nervous system assist the central
nervous system in relaying information about the environment and internal organs to the central
nervous system. The motor cells receive information from the central nervous system and transmit it
to the muscles, glands, and organs.
The central nervous system and the peripheral nervous system are the two main components of the
human nervous system. The brain and spinal cord make up the central nervous system. The
peripheral nervous system, on the other hand, is made up of nerves that send and receive signals
from the central nervous system.
There are 3 main functions of the nervous system:
1.
Sensory input- The various sensory receptors that monitor changes both inside and outside
the body provide sensory input. Sensory input is the whole sum of the information acquired
by these receptors. Sensory input is processed and interpreted by the neurological system,
which then determines what actions should be taken. Motor output is a reaction that occurs
when the nervous system activates effector organs such as muscles and glands.
2.
Motor response- Once the response has been engaged, the nervous system transmits
messages to muscles or glands via motor output to start the response. The nervous system's
sophistication in humans allows for language, abstract representation of concepts, cultural
transmission, and many other aspects of society that would not otherwise exist.
3.
Integration- On a more integrative level, the nervous system's fundamental role is to control
and communicate information throughout the body. It achieves it by exploiting sensory
receptors to extract data from the surroundings. The central nervous system receives this
sensory data and decides on an appropriate reaction.
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The nervous system structure