Question

Filum terminale of Frog is located in
A. Skull
B. Pelvic girdle
C. Urostyle
D. Pectoral girdle

Answer 1

Hint: The Filum terminale is a part of the nervous system, or more precisely, the spinal cord in humans. The Filum terminale extends from the terminal end of the spinal cord to the tailbone of the frog.

Step by step answer:The spinal cord lies in the neural canal of the vertebral column. It extends from the medulla oblongata of the brain to almost the end of the backbone. It makes up the peripheral nervous system or PNS. The end part of the spinal cord is known as the Conus medullaris. The conus medullaris is bounded by the innermost layer of the spinal cord known as the pia mater by fibrum terminal.
Thus, the Filum terminale is an extension of the pia mater. It extends from the terminal end of the spinal cord to the tailbone. The basic function of the filum terminale is to anchor the spinal cord in the position.

The spinal cord of a frog is a short and flattened structure. It widens anteriorly and tapers into the posterior. The posterior end into which the spinal cord tapers is known as the Urostyle. Here, it is known as the filum terminale.

Thus, the Filum terminale of the frog is located in the urostyle.
Hence, option (C) is the correct answer

Note: The urostyle is a long, unsegmented bone that is formed from the fused vertebrae at the posterior part of the base of the vertebral column. It is seen in lower vertebrates like some fishes and amphibians like frogs and toads.