Mader's Concepts in Biology, First Edition

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Sylvia S. Mader

Chapter 26

Question 1

All animals have a well defined head.

A. true

B. false

Question 2

Which of the following plays an important role in whether or not an organism has a head?

A. whether they fly or notB. whether they swim or notC. what is their lifestyle within a particular

environmentD. whether they are invertebrates or

vertebratesE. whether they run or not

Question 3

Of all the animals, which has the best developed forebrain?

A. amphibians

B. reptiles

C. fish

D. humans

E. birds

Question 4

Which of the following types of nervous system would be found in a sea anemone or a jellyfish?

A. a ladderlike nervous system

B. a ganglion nervous system

C. a nerve net

D. a ganglion with a dorsal nerve cord

E. a ganglion with a ventral nerve cord

Question 5

A ladderlike nervous system would be found in which of the following?

A. a flatworm

B. an earthworm

C. a sponge

D. a sea anemone

E. a crab

Question 6

You are dissecting a squid to determine what type of nervous system it has. Based on your dissection you conclude that it has:

A. a ladderlike nervous system

B. a ganglion nervous system

C. a nerve net

D. a ganglion with a dorsal nerve cord

E. a ganglion with a ventral nerve cord

Question 7

The concentration of nerve tissue and sensory receptors in the head region is referred to as:

A. autonomic

B. cephalization

C. neuromodulation

D. parasympathetic

E. diencephalon

Question 8

If you were studying the two parts of the central nervous system in vertebrates you would be studying:

A. a brain and nerve net

B. a ganglion and spinal cord

C. a ganglion and nerve net

D. a brain and spinal cord

E. a brain and ladderlike nervous system

Question 9

A biologist is studying the three main parts of the vertebrate brain. Based on this information you could conclude that he or she is studying the:

A. forebrain, midbrain, and spinal cordB. forebrain, midbrain, and medulla oblongataC. thalamus, midbrain, and hindbrainD. forebrain, midbrain, and hindbrainE. forebrain, hindbrain, and cerebellum

Question 10

Which of the following is the most ancient part of the vertebrate brain due to the fact that nearly all vertebrates have this part?

A. forebrain

B. cerebellum

C. hindbrain

D. cerebrum

E. midbrain

Question 11

If you were writing a paper on the part of the nervous system which picks up visceral and somatic information and which is attached to the skeletal muscle and glands, you would be writing on:

A. the central nervous system

B. the peripheral nervous system

C. the autonomic nervous system

D. the sympathetic nervous system

E. the parasympathetic nervous system

Question 12

Dendrites:

A. carry impulses away from a cell body

B. are always myelinated

C. are found only in the central nervous system

D. are solely responsible for nervous conduction

E. carry impulses toward a cell body

Question 13

Which of the following is not part of a motor neuron?

A. cell body

B. dendrite

C. Schwann cells

D. ganglion

E. axon

Question 14

If you were studying the cells which provide support and nourishment to neurons you would be studying:

A. neuroglia cells

B. Schwann cells

C. interneurons

D. myelin cells

E. Ranvier cells

Question 15

The type of neuron which carries impulses away from the central nervous system to a muscle or a gland is referred to as:

A. an afferent neuron

B. an interneuron

C. an efferent neuron

D. a terminal neuron

E. a sensory neuron

Question 16

A biologist is studying the type of neuron which takes nervous impulses from sensory receptors to the central nervous system for integration. Based on this information you would conclude that he or she is studying which of the following?

A. an interneuron

B. an afferent neuron

C. a ganglion neuron

D. an efferent neuron

E. a motor neuron

Question 17

Which statement is not true about the development of an action potential?

A. there is a rapid change in polarity from about -65mV to about +40mV

B. it can be produced by an electric shock or sudden pH change

C. the action potential ends when the polarity across the membrane reaches +40 mV

D. depolarization occurs when sodium gates open and allow sodium ions to enter the cell

E. potassium gates open after the sodium gates and allow potassium ions to leave the cell

Question 18

When the action potential "jumps" from node to node, thus increasing the speed of the nerve impulses, it is referred to as:

A. refractory conduction

B. depolarization conduction

C. synapse conduction

D. saltatory conduction

E. repolarization conduction

Question 19

When an axon is not conducting a nerve impulse and there is more sodium outside the axon and more potassium inside the axon it is referred to as:

A. an action potentialB. an autonomic potentialC. a resting potentialD. a somatic potentialE. a threshold potential

Question 20

If you were studying a rapid change in polarity across the axonal membrane as the nerve impulses occur, you would be studying:

A. an action potential

B. an autonomic potential

C. a resting potential

D. a somatic potential

E. a threshold potential

Answer Key – Chapter 261. B2. C3. D4. C5. A6. E7. B8. D9. D10. C

11. B12. E13. D14. A15. C16. B17. C18. D19. C20. A