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biology test ch 28
| Question | Answer |
|---|---|
| What is the basic body plan of all arthropods? | segmented body, tough exoskeleton, and jointed appendages. |
| a tough body wall that protects and supports the body of arthropods is called a(an)________ | exoskeleton. |
| What is chitin | it is made from protein and carbohydrates and it is what the arthropod exoskeleton is made up of. |
| What are appendages? | structures like legs and antennae that extend from the body wall. |
| What are two ways in which arthropods have evolved since they first appeared | fewer body segments and specialized appendages |
| network of branching tubes through which arthropods breathe | tracheal tube |
| organs through which horseshoe crabs respire | book lungs |
| small openings on the side of the body through which air enters and leaves tracheal tubes. | spiracles |
| layers of respiratory tissue stacked like the pages of a book through which spiders respire. | book gills |
| saclike organs that extract waste from the blood and add them to feces. | malpighian tubules |
| how do aquatic arthropods carry out excretion | diffusion moves cellular waste from the arthropods body into the surrounding water. |
| how do arthropods move | using groups of muscles that are coordinated and controlled by the nervous system |
| When do arthropods undergo periods of molting? | when they outgrow their exoskeleton |
| what occurs in arthropods during molting? | An arthropod sheds its entire exoskeleton and manufactures a larger one to take its place. |
| What characteristics do biologist use to classify arthropods? | based on the number and structure of their body segments and appendages |
| What are the three major groups of arthropods | crustaceans, spiders, insects |
| lies just behind the head and houses most of the internal organs. | thorax |
| fusion of the head with the thorax | cephalothorax |
| posterior part of the body. | abdomen |
| the part of the exoskeleton that covers the cephalothorax | carapace |
| mouthpart adapted for biting and grinding food. | mandible |
| first pair of legs in decapods which bear large claws | cheliped |
| flipper like appendages used for swimming | swimmerets |
| horseshoe crabs, spiders, ticks, and scorpions are grouped as | chelicerates |
| What is the function of the chelicerae? | contain fangs and are used to stab and paralyze prey |
| the appendages near the mouth that are usually modified to grab prey are called | pedipalps. |
| how do spiders respire? | air enters through spiracles and then circulates across the surface of the book lung. |
| what arthropods do arachnids include? | spiders, mites, ticks, and scorpions. |
| how are horse shoe crabs like and unlike crabs? | they are heavily armored like crabs but they have anatomy closer to that of a spider. |
| Scorpions have pedipalps that are enlarged into | claws |
| What do ticks transmit that cause rocky mountain spotted fever and lyme disease? | they carry bacteria that cause this disease. |
| centipedes, millipedes, and insects are all groped as | uniramians |
| Why are centipedes restricted to moist or humid areas? | they lack a waterproof coating on their exoskeleton. their bodies lose water easy. |
| how many pairs of legs does each body segment of most centipedes have? | one pair of legs |
| how many pairs of legs does each body segment of most millipede have? | 2 pairs per segment. |
Created by:
EmmaRoseDavis