Exam 12: Smaller Ecdysozoans

Adult Ascaris worms are found in the host's ______________.

Nematodes have a fluid-filled pseudocoel that serves as a _____________ skeleton.

The nematodes are the most diverse of the pseudocoelomates and include many important human parasites.

One of the most studied nematodes,whose genome is now known by geneticists is __________________.

The Kinorhyncha are tiny marine worms.

A state in which metabolism is extremely low,and in which the water content of the body is reduced to a few percent,is called ___________.

Tardigrades

A nematomorph worm is responsible for causing river blindness in many tropical areas. Multiple Choice Questions

Heavy infections of hookworms in human adults cause _____________.

The entire forepart of the body of a loriciferan can be withdrawn into the ________________.

Filarial worms (Wuchereria and Brugia)are transmitted by _____________.

Nematodes only have _________________ muscles,which results in their characteristic thrashing movement.

Tiny marine worms that burrow through mud by extending the head and anchoring it by recurved spines are ________________.

The _____________ are burrowing marine worms with a proboscis,trunk,and usually one or two caudal appendages.

Onychophorans

The most common helminth parasite in the United States is the _______________.

Juvenile trichina worms cause the transformation of the host skeletal muscle cell into a _____________________ cell.

Nematodes

Most nematode worms are under 5 cm long,but some are over a meter in length.

Humans are infected with Trichinella spiralis by eating insufficiently cooked ____________.