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#	Question	Answer
1	Which two systems jointly coordinate and integrate body activities?	The neural system and the endocrine system jointly coordinate and integrate body activities.
2	Into which two parts is the human neural system divided?	The human neural system is divided into the central neural system (CNS) and peripheral neural system (PNS).
3	What is the function of efferent nerve fibres?	Efferent nerve fibres transmit regulatory impulses from the CNS to the concerned peripheral tissues/organs.
4	What is the visceral nervous system?	It is a part of the peripheral nervous system comprising nerves, fibres, ganglia and plexuses connecting the CNS and viscera.
5	What do synaptic vesicles contain?	Synaptic vesicles contain chemicals called neurotransmitters.
6	What is a unipolar neuron?	A unipolar neuron has a cell body with one axon only and is usually found in the embryonic stage.
7	Where are unmyelinated nerve fibres commonly found?	They are commonly found in autonomous and somatic neural systems.
8	How is nerve impulse conducted along the axon?	Current flow reverses polarity at adjacent sites, generating action potentials sequentially along the axon.
9	Why is transmission faster in electrical synapses?	Because electrical current flows directly from one neuron to another.
10	What happens when an impulse reaches the axon terminal?	Synaptic vesicles move towards the membrane and fuse with the plasma membrane.
11	What is the role of the brain in the body?	The brain is the central information processing organ and acts as the command and control system.
12	Which meningeal layer is in direct contact with brain tissue?	Pia mater.
13	What connects the two cerebral hemispheres?	The cerebral hemispheres are connected by corpus callosum.
14	What is the function of the thalamus?	Thalamus is a major coordinating centre for sensory and motor signalling.
15	What are the functions of the limbic system?	It is concerned with olfaction, autonomic responses, regulation of sexual behaviour, expression of emotional reactions, and motivation.
16	What is the function of pons?	Pons consists of fibre tracts that interconnect different regions of the brain.
17	What is resting potential?	The electrical potential difference across the resting neural membrane is called resting potential.