Animal Life Processes

What happens to an arthropod during molting?

• It sheds its exoskeleton.
• It grows a new appendage.
• It replaces cartilage with bone.
• It contracts its muscles.

An endoskeleton is

• a hard outer covering
• a framework inside the body
• a skeleton without hard parts

Which of the following happens at a joint?

• muscle cells grow
• a new exoskeleton is formed
• spikelike structures are made in cells
• two parts of a skeleton meet

What is cartilage?

• a tissue that is harder than bone
• a tissue that is more flexible than bone
• plates that have calcium

What is the role of muscles?

• Muscles help animals move their body parts.
• Muscles are a framework that shapes and supports an animal.
• Muscles allow animals to detect, process, and react to environmental signals.

A signal that causes an animal to react in some way is called a

• response
• neuron
• stimulus
• impulse

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The most complex nervous systems have a nerve cord and

• brain
• eye spots
• nerve net

Sensory neurons are nerve cells that

• detect stimuli such as touch, sound, smell, and taste
• pass information between neurons
• carry response information to muscles and other organs
• are only found in mammals

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An animal that moves using a water vascular system is a

• sea star

• penguin

• squid

• shark

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Webbed feet are most useful for an animal to move

• on land
• in the air
• in water
• on ice