Major topics
💠Neuron – Structure and function Generation of impulses
💠Brain -Structure and function
💠Spinal cord -Structure and function
💠Reflex actions
💠Autonomous nervous system – Sympathetic and Parasympathetic system
💠The diseases affecting nervous system
FOCUS AREA TOPICS
💠A nerve cell or neuron- diagram, functions of dendrite, dendron, axon, axonite, synaptic knob.
💠Peculiarities and functions of motor nerve, sensory nerve, and mixed nerves .
💠Brain-diagram, functions of cerebrum, cerebellum,medulla oblongata, thalamus, hypothalamus
💠Causes and symptom of Parkinson’s, Alzheimer’s, and Epilepsy
NEURON
💠Dendrite Branches of dendron. Part that receives impulses from the
adjacent neuron
💠Dendron-Carries impulses from dendrites to the cell body
💠Axon – Longest filament from the cell body. Carries impulses to the
axonite.
💠Axonite- Branches of axon. Carries impulses to the synaptic knob
💠Synaptic knob- Tip of axonite, secretes neurotransmitter
💠Different types of nerves – sensory nerve, motor nerve and mixed
nerve.
💠Characteristics of nerves
• Sensory nerves :Formed of sensory nerve fibres
• Motor nerves: Formed of motor nerve fibres
• Mixed nerves : Formed of sensory nerve fibres and motor nerve fibres
TYPES OF NERVES
💠Sensory nerve carries impulses from brain and spinal cord to various parts of the body,
💠Motor nerve carries impulses from various parts of the body to brain and spinal cord.
💠Mixed nerve-Carries impulses to and from the brain and spinal cord
Top 10 most important topics of sslc biology chapter
Brain -Structure and function
1 💠Cerebrum
• Centre of thought, intelligence, memory and imaginations.
• evokes sensations.
• controls voluntary movements.
2 💠Cerebellum
• Coordinates muscular actions.
• maintains equilibrium of the body.
3.💠Thalamus
• Act as relay station of impulses to and from the brain.
• Analyses the impulses from various parts of the body and sends the
important ones to the cerebrum.
4.💠Hypothalamus
• Maintains homeostasis. Medulla oblongata
• Controls involuntary actions like heart beat, breathing etc.
SSLC CHEMISTRY FOCUS AREA BASED NOTES;High yielding points of chapter 1
