On exposing palm wine to air for some days, it becomes sour owing to the conversion of
On exposing palm wine to air for some days, it becomes sour owing to the conversion of
Explanation
The nervous system coordinates body activities. Central nervous system (CNS): brain and spinal cord. Peripheral nervous system: nerves connecting CNS to rest of body.
Neurons transmit signals: sensory (from receptors to CNS), motor (from CNS to muscles/glands), relay (connect neurons). Signal travels as electrical impulse along neuron, chemical at synapse.
Reflex arc: stimulus → receptor → sensory neuron → relay neuron → motor neuron → effector → response. Reflexes are fast, automatic, protective. Brain involved in conscious decisions and complex processing.