MEDICAL PHYSIOLOGY

PHYSIOLOGY

CENTRAL NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which cells provide structural support and help regulate nutrients and ions in tissue?
A
Astrocytes
B
Ependymal
C
Oligodendrocytes
D
Schwann cells
Explanation: 

Detailed explanation-1: -They are thought to have a similar role to astrocytes in the central nervous system (CNS). They supply nutrients to the surrounding neurons and also have some structural function.

Detailed explanation-2: -Astrocytes: provide nutrients and other substances to neurons, regulate the concentrations of ions and chemicals in the extracellular fluid, and provide structural support for synapses; also form the blood-brain barrier, which blocks entrance of toxic substances into the brain.

Detailed explanation-3: -Astrocytes regulate synaptic transmission and play a role in the formation of new memories, long-term potentiation (LTP), and functional synaptic plasticity. Specifically, astroglial release of glutamate, ATP, and cytokines likely alters the survivability and functioning of newly formed connections.

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