BJU Life Science CH. 11C

How does a non-sessile organism without any muscular system move around?

• passive locomotion

• active locomotion

What are the electrical signals that are used to control an animal’s actions?

• nerve impulses

• nerve net

• brain

• legs

Which support system is a rigid covering that supports an animal from outside its

body?

• hydroskeleton

• exoskeleton

• endoskeleton

Which animal uses a muscular siphon to move quickly through the water?

• clam

• octopus

• man o' war

• shark

Match the correct skeletal structure

• rely on fluid pressure to support

• exoskeleton

• inside; bone and/or cartilage

• hydroskeleton

• rigid covering that supports

• endoskeleton

Endoskeletons can support more weight than exoskeletons can.

• True

• False

Some animals, such as sponges, are _______, meaning that they remain in one place.

_______ locomotion means an animal allows their environment to move them.

Most animals, though, actively work to get around, and this work is the job of what system?

• muscular

• skeletal

• excretory

• circulatory

Match the correct methods of control.

• Simple nerve nets/no brains

• Cnidarians and Echinoderms

• Spinal cord and brain

• Sponges

• No nervous system

• Vertebrates