Introduction to Pseudocoelomates Quiz

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Questions and Answers

What is the function of the pseudocoel in pseudocoelomates?

  • To aid in hydrostatic support like a skeleton
  • To store waste throughout the body for processing
  • To provide a space for the development of sophisticated structures
  • To facilitate fluid circulation for waste storage (correct)

How does the nematode exhibit uniformity in its external anatomy?

  • By having a high-pressure hydrostatic internal skeleton
  • By having a multilayer hypodermis (correct)
  • By lacking longitudinal muscles but having circular ones
  • By having alternating contractions for locomotion

What drives the movement of nematodes?

  • Circular muscles
  • Undulating contractions of longitudinal muscles (correct)
  • Cilia
  • External segmentation

How do parasitic nematodes exist?

<p>By returning pressurized pseudocoel body to normal shape (A)</p> Signup and view all the answers

In what way do pseudocoelomates differ from animals with a true coelom?

<p>They possess a fluid-filled pseudocoel instead of a true coelom (B)</p> Signup and view all the answers

What is the role of the cuticle in nematodes?

<p>To cover and protect the body, preventing desiccation (C)</p> Signup and view all the answers

What is a characteristic of parasitic nematodes?

<p>They have extensive migrations within vertebrates. (D)</p> Signup and view all the answers

What is a common pathology associated with parasitic nematodes?

<p>Ground itch (C)</p> Signup and view all the answers

What is the reproductive capacity of parasitic nematodes in comparison to other animals?

<p>Greater than non-parasitic sponges. (D)</p> Signup and view all the answers

What is the significance of parasitic intestinal-nematodes like American Hookworm?

<p>Infect billions of people worldwide. (A)</p> Signup and view all the answers

Which condition is associated with parasitic filarial nematodes like Wuchereria bancrofti?

<p>Swelling of subcutaneous tissue caused by drainage issues. (B)</p> Signup and view all the answers

Where do adult parasitic nematodes primarily reside within their hosts?

<p>Small intestine (A)</p> Signup and view all the answers

Flashcards

Function of the Pseudocoel?

Facilitates fluid circulation for waste storage.

Nematode External Anatomy

Nematodes exhibit uniformity through a multilayer hypodermis.

Nematode Movement

Driven by undulating contractions of longitudinal muscles.

Parasitic Nematode Existence

Returning pressurized pseudocoel body to normal shape

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Pseudocoelomates vs. Coelomates

Possess a fluid-filled pseudocoel instead of a true coelom.

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Role of Cuticle in Nematodes

Covers and protects the body, preventing desiccation.

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Parasitic Nematode Characteristic

They have extensive migrations within vertebrates.

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Ground Itch

A skin condition caused by hookworm larvae.

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Reproductive Capacity

Greater than non-parasitic sponges.

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American Hookworm Significance

Infect billions of people worldwide.

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Wuchereria bancrofti Condition

Swelling of subcutaneous tissue caused by drainage issues.

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Adult Parasitic Nematode Location

Small intestine.

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