XI Chap 21 Neural Control & Coordination Flashcards
________________ is the process through which 2 or more organs interact and complement the functions of one another
Coordination
Physical exercises is an example of coordination. T or F?
True
Functions of muscles, lungs, heart, blood vessels, kidney and other organs are coordinated while performing physical activity. T or F?
True
The __________ system and the __________ system jointly coordinate and integrate all activities of the organs.
neural, endocrine
Neural system provides an organised network of __________ for quick coordination
point-to-point connections
Endocrine system provides chemical integration through __________
hormones
Neural system of ALL animals is composed of neurons. T or F?
True
__________ are highly specialised cells which can detect, receive and transmit different kinds of stimuli.
Neurons
Neural organisation is very __________ (simple / complex) in lower invertebrates.
very simple
In Hydra, neural system is composed of __________
a network of neurons
Neural system is better organised in insects than lower invertebrates, where a __________ is present along with __________ and __________
brain, ganglia, neural tissues
Human neural system is divided into 2 parts:
CNS (central)
PNS (peripheral)
CNS includes the __________ and the __________
brain, spinal cord
CNS is the site of __________
information processing and control
PNS comprises of ALL the nerves in the body associated with CNS. T or F?
True
Nerve fibres of PNS are of 2 types:
afferent, efferent
Afferent vs efferent fibres
Afferent - impluses from tissues/organs to CNS
Efferent - regulatory impulses from CNS to peripheral tissues/organs
PNS is divided into 2 divisions:
somatic neural system
autonomic neural system
Somatic neural system vs Autonomic neural system?
Somatic - relays impulses from CNS to skeletal muscles
Autonomic - impulses from CNS to involuntary organs and smooth muscles
Autonomic neural system is further classified into:
sympathetic neural system
parasympathetic neural system
Visceral nervous system is part of __________ nervous system (central / peripheral)
peripheral
Visceral nervous system comprises of:
the whole complex of nerves, fibres, ganglia and plexuses by which impulses travel from CNS to viscera and from viscera to CNS
Neuron is a microscopic structure composed of 3 parts:
cell body, dendrites, axon
Cell body of neuron contains cytoplasm with __________ and certain granular bodies called __________
typical cell organelles, Nissl’s granules