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Zorluk: OrtaKingdom Protista: Protozoa and Unicellular Algae

Arrange the following sequential stages of holozoic nutrition and intracellular digestion in *Amoeba proteus* from the initial capture of food to the elimination of waste.

  1. 1Extension of pseudopodia to surround and capture the food particle
  2. 2Enclosure of the food particle within a pinched-off intracellular food vacuole
  3. 3Discharge of hydrolytic digestive enzymes into the food vacuole by lysosomes
  4. 4Absorption of soluble nutrients across the vacuolar membrane into the cytoplasm
  5. 5Exocytosis of insoluble residual waste through the cell membrane to the exterior

Cevap

The correct chronological sequence of holozoic nutrition in *Amoeba proteus* is: Extension of pseudopodia to capture food → Enclosure of food within a food vacuole → Discharge of hydrolytic enzymes by lysosomes → Absorption of soluble nutrients into cytoplasm → Exocytosis of insoluble residual waste.
Holozoic nutrition in *Amoeba* follows a strict sequence: pseudopodia surround the food, a food vacuole forms around it, lysosomes release digestive enzymes into the vacuole, digested soluble nutrients are absorbed into the cytoplasm, and finally undigested waste is egested via exocytosis.

Adım Adım Çözüm

1
Identify the initial contact and engulfment phase.
Pseudopodia extend to encapsulate the prey item.
Phagocytosis in Amoeba relies on pseudopodial engulfment.
2
Identify the vacuole formation phase.
The food particle is enclosed in a food vacuole.
Membrane fusion isolates the ingested prey inside the cell cytoplasm.
3
Identify the chemical digestion phase.
Lysosomes release hydrolytic enzymes into the food vacuole.
Enzymatic hydrolysis degrades complex organic matter into simpler solutes.
4
Identify the nutrient assimilation phase.
Soluble nutrients diffuse into the cytoplasm.
Digested simple nutrients must be absorbed into the cytoplasm for cellular growth and metabolism.
5
Identify the egestion phase.
Insoluble waste is expelled by exocytosis.
Undigested materials are removed by fusing the vacuole membrane with the plasma membrane.

Anahtar Kavram

Holozoic Nutrition and Intracellular Digestion in Amoeba
Tahmini Süre:1m 30s
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