What Internal Structure Is Indicated by Arrows on This Figure

question 27

Multiple Choice

What internal structure is indicated by arrows on this figure?

• A) cilia
• B) flagella
• C) mitochondria
• D) nucleus

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Definitions:

Serum Calcium

The concentration of calcium in the blood, important for bone health and muscle function, among other physiological processes.

Astrocytes

Star-shaped glial cells in the brain and spinal cord that support neurons, participate in the blood-brain barrier, and help regulate synaptic function.

Microglia

Phagocytic glial cells found in the CNS.

Ependymal Cells

Glial cells positioned along the brain's ventricles and the spinal cord's central canal, contributing to cerebrospinal fluid generation.