CBSE/NCERT/Notes/Class_11_Biology
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Created by Titas Mallick
Biology Teacher • M.Sc. Botany • B.Ed. • CTET (CBSE) • CISCE Examiner
Note on Neural Control and Coordination
Coordination is the process where two or more organs interact and complement each other. The neural system provides an organized network for quick point-to-point connections, while the endocrine system provides chemical integration through hormones.
The human neural system is divided into two parts:
A neuron consists of three main parts:
Saltatory Conduction In myelinated axons, the nerve impulse 'jumps' from one node of Ranvier to the next. This is called saltatory conduction, and it is significantly faster than continuous conduction in unmyelinated fibers.
Resting Potential Maintenance The resting membrane potential is maintained by the active transport of ions by the Na+/K+ pump, which transports 3 outwards for 2 into the cell at the cost of one ATP.
Transmission occurs at a synapse (pre-synaptic and post-synaptic neurons separated by a synaptic cleft).
The brain is protected by the skull and three cranial meninges (dura mater, arachnoid, and pia mater).
Corpus Callosum The two cerebral hemispheres are connected by a large tract of nerve fibers called the corpus callosum, which allows communication and coordination between the left and right sides of the brain.
/CBSE/NCERT/Notes/Class_11_Biology/Chapter_18_Neural_Control_and_Coordination.mdx