Question

The seat proliferation of new proglottids in the body of Taenia is
A. Scolex
B. Strobila
C. Neck
D. The whole body

Answer 1

Hint: Taenia, tapeworm is a human gut parasite. It is also called an armed or solitary tapeworm. It keeps firmly attached to the intestinal wall by hooks and suckers. It has saprozoic nutrition and anaerobic respiration. It is hermaphrodite and undergoes self-fertilization.

Complete answer:
Taenia has a flat, white, ribbon-like body, about 4 mm x 6 mm. It consists of 3 regions: a small head or scolex with hooks and suckers for attachment, a short neck for forming new proglottids., and a very long strobila of some 850 proglottids. The last proglottids have a median excretory pore at the hind end. After detachment of these proglottids, the two excretory ducts open out independently. The proglottis are of three types: anterior immature proglottids that are wider than long and have developing sex organs, middle mature proglottides that are nearly squarish and contain fully formed sex organs, and posterior gravid proglottides which are longer than wide and packed with capsules. Each mature proglottid has a complete set of male and female sex organs. Gravid proglottids detach from the strobila (apolysis) and pass out in the host’s feces. They contain capsules.
A capsule is an egg and a yolk cell enclosed by a shell. The egg develops into an embryo.
So, the correct answer is option C, i.e., Neck

Note: Man gets infection by taking undercooked pork containing encysted larvae called cysticerci. There is generally a single tapeworm in one host. This may be due to the inability of the host to support more worms in its intestine. Tapeworm causes taeniasis in weak individuals.