Nervous System Basics

It is the chief control and coordinating system of the body. It adjusts the body to its surrounding and regulates all body activities both Voluntary and Involuntary. The basic structural and functional unit of the nervous system is nerve cell which is also called ______.

Information processing in the nervous systems takes place through exchange of ______ (Action Potentials).

CENTRAL NERVOUS SYSTEM - CNS Integrates and correlates incoming sensory information. Source of thoughts, emotions and memories. Most motor signals originate in CNS. Consists of ______ and Spinal Cord.

PERIPHERAL NERVOUS SYSTEM - PNS Nerve fibers that carry information between CNS and other parts of body at periphery. I. Afferent Division (Sensory) –carry information to CNS II. Efferent Division (Motor) – which carry information from CNS to muscle and glands. Efferent (Motor) division of PNS further divide into  Somatic Nervous System  it is under our voluntary control E.g. Nerve fibers of motor neuron that supply skeletal ______.

Enteric Nervous System is a local network of nerves in the GIT controlling the secretory and motor activities of GIT and under influence of ______

Autonomic Nervous System  it is not under our control (involuntary) and supplies smooth ______ and glands.

Neurons in the peripheral nervous system transmit signals between the Receptors and CNS or CNS and Effectors in the body. In Peripheral Nervous System, there are … 12 pairs of ______ Nerves

The Autonomic Nervous System (ANS) supplies cardiac muscle, smooth muscle, and ______

Glial cells support the neurons physically, metabolically, and ______

The human nervous system contains about 10^12 ______