Neural Control and Coordination
CBSE · Class 11 · Biology
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What is coordination and why is it essential for maintaining homeostasis in the human body?
Answer
Coordination is the process through which two or more organs interact and complement each other's functions to maintain homeostasis. It is essential because all organ systems must work together in a s…
What are the two main systems that coordinate body functions? How do they differ?
Answer
The two main coordinating systems are: 1) Neural System - provides point-to-point connections for quick coordination through electrical impulses, and 2) Endocrine System - provides chemical integratio…
What are the two main divisions of the human neural system?
Answer
The human neural system is divided into: 1) Central Neural System (CNS) - includes brain and spinal cord, site of information processing and control, and 2) Peripheral Neural System (PNS) - comprises …
Differentiate between afferent and efferent nerve fibres in the PNS.
Answer
Afferent nerve fibres transmit impulses FROM tissues/organs TO the CNS (sensory information - 'arriving' at CNS). Efferent nerve fibres transmit regulatory impulses FROM the CNS TO peripheral tissues/…
What are the two divisions of the PNS and their functions?
Answer
The PNS has two divisions: 1) Somatic Neural System - relays impulses from CNS to skeletal muscles (voluntary movements), and 2) Autonomic Neural System - transmits impulses from CNS to involuntary or…
Describe the three major parts of a neuron and their functions.
Answer
A neuron has three major parts: 1) Cell Body - contains cytoplasm, organelles, and Nissl's granules, 2) Dendrites - short, branched fibres that transmit impulses TOWARDS the cell body, and 3) Axon - l…
What are Nissl's granules and synaptic knobs?
Answer
Nissl's granules are granular bodies found in the cell body and dendrites of neurons. Synaptic knobs are bulb-like structures at the terminal ends of axon branches that contain synaptic vesicles fille…
Classify neurons based on the number of axons and dendrites.
Answer
Based on axon and dendrite number, neurons are: 1) Multipolar - one axon and two or more dendrites (found in cerebral cortex), 2) Bipolar - one axon and one dendrite (found in retina), and 3) Unipolar…
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- National Education Policy 2020 — education.gov.in
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