Question

which type of neuroglial cells help regulate the composition of cerebrospinal fluid?
astrocytes
ependymal cells
oligodendrocytes
microglia
question 17
2 pts
what type of epithelium lines the urinary bladder and is capable of distention?
stratified squamous epithelium
stratified cuboidal epithelium
transitional epithelium
stratified columnar epithelium

Explanation:

• For the first question: Ependymal cells line the ventricles of the brain and central canal of the spinal cord. They have cilia that help circulate cerebrospinal fluid (CSF) and are involved in regulating its composition. Astrocytes have functions like forming the blood - brain barrier and providing nutrients to neurons. Oligodendrocytes form myelin sheaths in the central nervous system. Microglia are the immune cells of the central nervous system.
• For the second question: Transitional epithelium is specialized to stretch (distend). It lines organs like the urinary bladder. Stratified squamous epithelium is found in areas like the skin (protection). Stratified cuboidal epithelium is rare and found in some gland ducts. Stratified columnar epithelium is also relatively rare and found in some large gland ducts.

Answer:

• First question: Ependymal cells
• Second question: Transitional epithelium