Nervous System and Neurons

In retina, bipolar neurons are present.

A wave of electrochemical disturbance that passes along the elements of nervous system during the conduction of an excitation is called nerve impulse.

A narrow intercellular space present between two neurons in the region of synapse is known as synaptic cleft.

Axons of neurons covered by non-nervous cells are called glia.

Vitamin E deficiency causes nerve problems due to poor conduction of electrical impulses along nerves due to changes in the nerve membrane structure and function.

Glycerophospholipids, also referred to as phospholipids, are ubiquitous in nature and are key components of the lipid bilayer of cells, as well as being involved in metabolism and cell signaling. Neural tissue (including the brain) contains relatively high amounts of glycerophospholipids, and alterations in their composition has been implicated in various neurological disorders.

The brain is the centre of the nervous system in all vertebrate and most invertebrate animals. In vertebrates the brain is located in the head, protected by the skull and close to the primary sensory apparatus of vision, hearing, balance, taste and smell.

In human anatomy, the sacral plexus is a nerve plexus which provides motor and sensory nerves for the posterior thigh, most of the lower leg, the entire foot and part of the pelvis. It is part of the lumbosacral plexus and emerges from the sacral vertebrae (S2-S4).

The vestibular nerve ganglion also called Scarpa's ganglion is the ganglion of the vestibular nerve. It contains the cell bodies of the bipolar primary afferent neurons whose peripheral processes form synaptic contact with hair cells of the vestibular sensory end organs.

A Schwann cell wraps around the axon many times, forming a spiral of membrane. The myelin sheath serves as an insulator for individual axons, allows the signals to move faster along the axon and can help in the repair of a damaged axon.

It is an enzyme that catalyses the breakdown of acetylcholine and of some other choline esters that function as neurotransmitters.

The insulating envelope of myelin surrounds the core of a nerve fibre or axon and facilitates the transmission of nerve impulses, formed from the cell membrane of the Schwann cell in the peripheral nervous system and from oligodendroglia cells. It is also called medullary sheath.

Correct Answer: 5^th

Correct Answer: -70

Correct Answer: sympathetic nervous system