Examkin

Soru

Zorluk: OrtaAnimal Nutrition and Digestive System

The tapeworm (*Taenia solium*) lives as an endoparasite in the human small intestine and completely lacks a mouth and digestive tract. Which of the following best describes how the tapeworm obtains its nutrients?

  1. Absorbing already digested soluble nutrients across its general body surface from the host's intestinal fluidCevap
  2. B
    Secreting extracellular digestive enzymes into the host intestine to decompose complex organic matter before absorption
  3. C
    Ingesting solid food particles through microscopic surface pores via phagocytosis
  4. D
    Synthesizing organic nutrients internally using inorganic substances absorbed from host blood

Cevap

Absorbing already digested soluble nutrients across its general body surface from the host's intestinal fluid
The correct answer highlights that tapeworms are structurally adapted for parasitic absorption. Since they inhabit the host's small intestine where food is already digested into soluble forms like glucose and amino acids, they absorb these nutrients directly across their permeable tegument without needing a digestive tract.

Adım Adım Çözüm

1
Analyze the anatomical adaptation of the tapeworm
Recognize that Taenia solium lacks a mouth, gut, or digestive glands.
Structural absence of an alimentary canal indicates that the organism cannot ingest solid food or secrete digestive enzymes.
2
Determine the mode of nutrition and site of residence
The tapeworm resides in the ileum/jejunum where the host has already broken down complex foods into soluble end-products.
Living surrounded by digested chyme allows direct absorption across the microvilli-like projections (microtriches) of its tegument.

Anahtar Kavram

Parasitic Digestive Adaptations
Bu soruyu puanla

Konular

Animal Nutrition and Digestive System

Bu konudan daha fazla soru