Glossary 4.1

The glossary provides definitions and explanations of key terms and concepts essential to understand the topic in the lesson. Be sure to familiarize yourself with each term before attempting the lesson glossary quiz.

Browse the glossary using this index

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A

Afferent System

the component of the peripheral nervous system that receives input through receptors and transmits the input to the central nervous system

Autonomic System

a subdivision of the efferent system (within the PNS); regulates the internal environment

B

Blood-Brain Barrier

a barrier formed by tight junctions between endothelial cells in the capillaries in the brain that blocks the movement of most substances into the brain via the bloodstream

C

Central Nervous System (CNS)

the body's coordinating centre for mechanical and chemical action; made up of the brain and spinal cord

Cerebellum

the hindbrain region that is involved in muscle movement and balance

Cerebral Cortex

the outermost layer of the cerebral hemispheres

Cerebrospinal Fluid

circulating fluid that surrounds the membranes of the brain and spinal cord; provides neural connection to the endocrine system

Cerebrum

the brain region that is involved in motor activities and sensory information; the largest and most developed region of the brain

E

Efferent System

the component of the peripheral nervous system that carries signals away to the effectors (muscles and glands)

G

Grey Matter

the tissue of the brain and spinal cord where the cell bodies and dendrites of neurons are located

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