Biology

Vitex Peduncularis Plant

Vitex Peduncularis Plant

Vitex Peduncularis Plant Vitex is a genus of about 250 species of shrubs and trees from 1-35 m tall, native to tropical, subtropical and also warm temperature regions throughout the world. In the past widely included in the family Verbenaceae, it has recently been transferred to the family Lamiac.....

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Active Transport

Active Transport

Active Transport Definition Active transport is the movement of ions or molecules across a cell membrane in the direction opposite that of diffusion, that is, from an area of lower concentration to one of higher concentration. Active transport requires the assistance of a type of protein called a.....

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Potassium Channel

Potassium Channel

Potassium Channel Definition Potassium channels are designed to allow the flow of potassium ions across the membrane but to block the flow of other ions–in particular, sodium ions. They form potassium-selective pores that span cell membranes. Furthermore, potassium channels are found in mos.....

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Endothelium

Endothelium

Endothelium Definition The endothelium is a thin layer of flat cells lining the closed internal spaces of the body such as the inside of blood vessels and lymphatic vessels that convey the lymph, a milky fluid, and the heart. It is called endothelial cells. Endothelial cells in direct contact wit.....

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Microglia

Microglia

Microglia Definition Microglia is any of the small neuroglial cells of the central nervous system (CNS) having long processes and ameboid and phagocytic activity at sites of neural damage or inflammation. It is also called Hortega cell. Microglia account for 10–15% of all cells found within the.....

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Subthalamic Nucleus

Subthalamic Nucleus

Subthalamic Nucleus Definition Subthalamic nucleus is a circumscript nucleus that is located in the ventral part of the subthalamus, receives a massive projection from the lateral segment of the globus pallidus, and projects to both pallidal segments and to the mesencephalic tegmentum. In terms o.....

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Basal Ganglia

Basal Ganglia

Basal Ganglia Definition Basal ganglia are a region of the base of the brain that consists of three clusters of neurons that are responsible for involuntary movements such as tremors, athetosis, and chorea. It is also known as basal nuclei, which consists of the corpus stratium (major group of ba.....

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Striatum

Striatum

Striatum Definition Striatum is a subcortical part of the forebrain and a critical component of the reward system. It is also known as the neostriatum or striate nucleus. It is also called the striate body. The term striatum (striate) refers to the layered appearance of bands of gray matter that .....

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Premotor Cortex

Premotor Cortex

Premotor Cortex Definition Premotor cortex is an area of the brain located directly behind the prefrontal cortex that plays an important role in motor planning. It occupies part of Brodmann’s area 6. It has been studied mainly in primates, including monkeys and humans. It is also part of th.....

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Motor Cortex

Motor Cortex

Motor Cortex Definition Motor cortex is the region of the cerebral cortex influencing movements of the face, neck and trunk, and arm and leg. It is the region of the cerebral cortex involved in the planning, control, and execution of voluntary movements. It is located in the posterior part of the.....

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Corpus Callosum

Corpus Callosum

Corpus Callosum Definition Corpus callosum is the transverse band of nerve fibers that connects the right and left cerebral hemispheres. It is also called callosal commissure, which is a wide commissure, a flat bundle of commissural fibers, about 10 cm long beneath the cerebral cortex in the brai.....

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Brainstem

Brainstem

Brainstem Definition Brainstem is the part of the vertebrate brain located at the base of the brain and made up of the medulla oblongata, pons, and midbrain. The brainstem controls and regulates vital body functions, including respiration, heart rate, and blood pressure. It provides the main moto.....

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