28 Assessment

28.1 Response

Understand Key Concepts

  1. Information received from the environment that causes an organism to respond is called a

    1. response.

    2. stimulus.

    3. reaction.

    4. trigger.

  2. The simplest nervous systems are called

    1. cephalopods.

    2. motor neurons.

    3. nerve nets.

    4. sensory neurons.

  3. In vertebrates, the part of the brain that coordinates body movements is the

    1. olfactory lobe.

    2. optic lobe.

    3. cerebrum.

    4. cerebellum.

  4. The arrows in this diagram are pointing to which structures?

    Nervous system of an Anthropod - Straight structure with arrows pointing towards dots in the straight structure.

    1. ganglia

    2. brains

    3. nerve nets

    4. motor neurons

  5. What two major trends in the evolution of the nervous system do invertebrates exhibit?

  6. In general, how do the brains of mammals compare with the brains of other vertebrates? What is the significance of that difference?

  7. What kinds of environmental stimuli are some animals capable of sensing that humans cannot sense?

Think Critically
  1. Compare and Contrast List the three major types of neuron and compare their roles.

  2. Apply Concepts Suppose a pet dog is having difficulty coordinating its movements. Why might a veterinarian X-ray the dog's brain?

28.2 Movement and Support

Understand Key Concepts

  1. Which of the following animals uses a hydrostatic skeleton to move?

    1. arthropod

    2. sponge

    3. fish

    4. annelid

  2. An arthropod's exoskeleton performs all of the following functions EXCEPT

    1. production of gametes.

    2. protection of internal organs.

    3. support of the animal's body.

    4. prevention of loss of body water.

  3. Vertebrates have endoskeletons made of

    1. chitin.

    2. cartilage and/or bone.

    3. calcium carbonate.

    4. bone only.

  4. Muscles generate force

    1. only when they lengthen.

    2. only when they shorten.

    3. when they lengthen or shorten.

    4. all the time.

  5. How do a fish's muscles function when the fish swims?

Think Critically
  1. Compare and Contrast List two advantages and two disadvantages of exoskeletons and endoskeletons.

  2. Apply Concepts The diagrams below show a type of skeletal system found in invertebrates. What is the name for this type of skeleton? Describe how it functions.

    Skeleton system of two invertebrates are illustrated as below:
 With circular muscles contracted.
 With longitudinal muscles contracted.


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Table of Contents

Miller & Levine Biology UNIT 1 The Nature of Life UNIT 2 Ecology UNIT 3 Cells UNIT 4 Genetics UNIT 5 Evolution UNIT 6 From Microorganisms to Plants UNIT 7 Animals UNIT 8 The Human Body A Visual Guide to The Diversity of Life Appendices Glossary Index Credits