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Chapter 25

BIOL 1010 Chapter 25: Topic 25.4

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Biological Sciences
BIOL 1010
Emily A.Mc Kinnon

OD88729 Bio 1010 Herbivores: eat mainly autrotrophs(plant and algae) ex: cattlem gorillas, sea urchins & snails Carnivores: mostly eat animals eX: lions, spiders, hawks and whales Omnivores: consume both plant and animals ex: humans, crows, cockroaches, and raccooons Suspension feeders: filter small organisms or food particles from water ex: humpback whale, clams and oysters Substrate feeders: live in or on their food source and eat their way through it ex: caterpillars, maggots Fluid feeders: suck nutrient-rich fluids from a living host. Ex: mosquitoes, ticks Bulk feeders: ingest large pieces of food using utensils such as tentacles pincers, claws, fangs, jaws, teeth to kill its prey and tear off pieces of meat or vegetation. eX: sharks, lions, etc Ingestion: act of eating, first of 4 main stages of food processing Digesting: breaking down of food into molecules small enough for body to absorb Occurs in 2 phases: First food is mechanically broken down into smaller pieces often by chewing, tearing Chemical breakdown process called hydrolysis . Catalyzed by specific enzyes hyrdrolysis breaks the chemical bonds in food molecules by adding water to them Digestion breaks down carbs, fats and proteins nuceleic acids into monomers (monosaccharides, fats aren’t polyemers but are split into glycerol and fatty acids, and nucleic acids) Absorption: cells lining dig tract absorb the products of digestion—small molecules such as amino ac
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