Question 1

Which of the following is true for actin?

Accepted Answer

A)  Portions of the actin molecule bend and move along myosin molecules. 
B)  Actin binds to myosin. 
C)  Actin uses up calcium ions. 
D)  Actin conducts the nerve impulse to the muscle cell. 
A)  Portions of the actin molecule bend and move along myosin molecules. 
B)  Actin binds to myosin. 
C)  Actin uses up calcium ions. 
D)  Actin conducts the nerve impulse to the muscle cell.

Question 2

Sense organs

Accepted Answer

A)  are responsible for perception. 
B)  detect stimuli. 
C)  change the activity of the endocrine system. 
D)  only respond to electrical changes. 
A)  are responsible for perception. 
B)  detect stimuli. 
C)  change the activity of the endocrine system. 
D)  only respond to electrical changes.

Question 3

Which is the normal direction in which the nerve impulse flows?

Accepted Answer

A)  axon-soma-dendrite 
B)  dendrite-soma-axon 
C)  soma-dendrite-axon 
D)  dendrite-synapse-axon 
A)  axon-soma-dendrite 
B)  dendrite-soma-axon 
C)  soma-dendrite-axon 
D)  dendrite-synapse-axon

Question 4

The pitch of sound is determined by the

Accepted Answer

A)  number of sound waves. 
B)  frequency of sound waves. 
C)  intensity of sound waves. 
D)  size of sound waves. 
A)  number of sound waves. 
B)  frequency of sound waves. 
C)  intensity of sound waves. 
D)  size of sound waves.

Question 5

The ____ nervous system consists of the brain and spinal cord and the ____ nervous system consists of nerves.

Accepted Answer

A)  sensory; motor 
B)  central; peripheral 
C)  peripheral; sensory 
D)  sensory; central 
A)  sensory; motor 
B)  central; peripheral 
C)  peripheral; sensory 
D)  sensory; central

Question 6

In which of the following ways are the nervous and endocrine systems similar?

Accepted Answer

A)  Both contain cells that carry impulses. 
B)  Both secrete molecules that attach to other cells. 
C)  Both typically are fast acting. 
D)  Both typically use the circulatory system to transport molecules. 
A)  Both contain cells that carry impulses. 
B)  Both secrete molecules that attach to other cells. 
C)  Both typically are fast acting. 
D)  Both typically use the circulatory system to transport molecules.

Question 7

In a case of positive feedback, an increase in the stimulus causes ______ in the response and does not result in homeostasis.

Accepted Answer

A)  a slight decrease 
B)  an increase 
C)  no change 
D)  a large decrease 
A)  a slight decrease 
B)  an increase 
C)  no change 
D)  a large decrease

Question 8

When __________ is uncovered and myosin can bind to it, contraction of a muscle can occur when ATP is utilized.

Accepted Answer

A)  actin 
B)  myosin 
C)  tropomyosin 
D)  troponin 
A)  actin 
B)  myosin 
C)  tropomyosin 
D)  troponin

Question 9

Responses that are the result of hormones generally require

Accepted Answer

A)  large quantities of hormones to be produced. 
B)  brief episodes of hormone release. 
C)  that hormones be released in small quantities over a period of time. 
D)  cells to increase their sensitivity to nervous stimulation. 
A)  large quantities of hormones to be produced. 
B)  brief episodes of hormone release. 
C)  that hormones be released in small quantities over a period of time. 
D)  cells to increase their sensitivity to nervous stimulation.

Question 10

Negative-feedback control involves which of the following?

Accepted Answer

A)  The product of a gland stimulates the gland to produce more product. 
B)  The product of gland A stimulates gland B to produce its hormone, which inhibits gland A 
C)  The hormone produced by gland A stimulates gland B 
D)  The hormone produced by gland A stimulates gland B to produce its hormone, which stimulates gland A 
A)  The product of a gland stimulates the gland to produce more product. 
B)  The product of gland A stimulates gland B to produce its hormone, which inhibits gland A 
C)  The hormone produced by gland A stimulates gland B 
D)  The hormone produced by gland A stimulates gland B to produce its hormone, which stimulates gland A

Question 11

Low-pitched, long-wavelength sounds are distinguished by stimulating

Accepted Answer

A)  the basilar membrane far from the base. 
B)  the semicircular canals. 
C)  the basilar membrane more vigorously. 
D)  only the vertical semicircular canals. 
A)  the basilar membrane far from the base. 
B)  the semicircular canals. 
C)  the basilar membrane more vigorously. 
D)  only the vertical semicircular canals.

Question 12

The space between the axon of one neuron and dendrite of the next is called the

Accepted Answer

A)  soma. 
B)  nerve. 
C)  synapse. 
D)  neurotransmitter. 
A)  soma. 
B)  nerve. 
C)  synapse. 
D)  neurotransmitter.

Question 13

Which of the following is true for the brain?

Accepted Answer

A)  All parts of the brain are the same in terms of the kinds of neurotransmitters that are used to store information. 
B)  Several kinds of neurotransmitters are used to store information. 
C)  Different parts of the brain are sensitive to different neurotransmitters. 
D)  Neurotransmitters are distributed to various parts of the brain. 
A)  All parts of the brain are the same in terms of the kinds of neurotransmitters that are used to store information. 
B)  Several kinds of neurotransmitters are used to store information. 
C)  Different parts of the brain are sensitive to different neurotransmitters. 
D)  Neurotransmitters are distributed to various parts of the brain.

Question 14

The behavior of animals is under the control of

Accepted Answer

A)  the endocrine system. 
B)  the nervous system. 
C)  both the nervous system and the endocrine system. 
D)  neither the nervous system nor the endocrine system. 
A)  the endocrine system. 
B)  the nervous system. 
C)  both the nervous system and the endocrine system. 
D)  neither the nervous system nor the endocrine system.

Question 15

Hormone messages are received by

Accepted Answer

A)  neurotransmitters. 
B)  receptor molecules on target cells. 
C)  dendrites. 
D)  all body cells. 
A)  neurotransmitters. 
B)  receptor molecules on target cells. 
C)  dendrites. 
D)  all body cells.

Question 16

Acetylcholine is a

Accepted Answer

A)  neurotransmitter. 
B)  hormone. 
C)  synthetic drug. 
D)  pigment. 
A)  neurotransmitter. 
B)  hormone. 
C)  synthetic drug. 
D)  pigment.

Question 17

After activation, these cells have the ability to move toward an enemy cell, press up against its surface, and make holes in it.

Accepted Answer

A)  cytotoxic T-cells 
B)  T-regulator cells 
C)  antigen-presenting cell (APCs) 
D)  B-cells 
A)  cytotoxic T-cells 
B)  T-regulator cells 
C)  antigen-presenting cell (APCs) 
D)  B-cells

Question 18

Which of the following is true of the sensory system?

Accepted Answer

A)  Sense organs interpret the information received. 
B)  Sense organs respond to hormonal stimulation. 
C)  Cells in sense organs depolarize and stimulate neurons. 
D)  Neurons send messages to sensory cells, to which the sensory cells respond. 
A)  Sense organs interpret the information received. 
B)  Sense organs respond to hormonal stimulation. 
C)  Cells in sense organs depolarize and stimulate neurons. 
D)  Neurons send messages to sensory cells, to which the sensory cells respond.

Question 19

Which of the following rows correctly identifies the structures of a nerve cell?

Accepted Answer

A)  Row 1 
B)  Row 2 
C)  Row 3 
D)  Row 4 
A)  Row 1 
B)  Row 2 
C)  Row 3 
D)  Row 4

Question 20

Muscles are in antagonistic sets because

Accepted Answer

A)  muscles cannot lengthen by themselves. 
B)  muscles push but cannot pull. 
C)  they do not like one another. 
D)  there is an increase in metabolic efficiency if they are present in antagonistic sets. 
A)  muscles cannot lengthen by themselves. 
B)  muscles push but cannot pull. 
C)  they do not like one another. 
D)  there is an increase in metabolic efficiency if they are present in antagonistic sets.

Exam 26: The Bodys Control Mechanisms and Immunity

Which of the following is true for actin?

Sense organs

Which is the normal direction in which the nerve impulse flows?

The pitch of sound is determined by the

The ____ nervous system consists of the brain and spinal cord and the ____ nervous system consists of nerves.

In which of the following ways are the nervous and endocrine systems similar?

In a case of positive feedback, an increase in the stimulus causes ______ in the response and does not result in homeostasis.

When __________ is uncovered and myosin can bind to it, contraction of a muscle can occur when ATP is utilized.

Responses that are the result of hormones generally require

Negative-feedback control involves which of the following?

Low-pitched, long-wavelength sounds are distinguished by stimulating

The space between the axon of one neuron and dendrite of the next is called the

Which of the following is true for the brain?

The behavior of animals is under the control of

Hormone messages are received by

Acetylcholine is a

After activation, these cells have the ability to move toward an enemy cell, press up against its surface, and make holes in it.

Which of the following is true of the sensory system?

Which of the following rows correctly identifies the structures of a nerve cell?

Muscles are in antagonistic sets because

What Is Biology

The Basics of Life: Chemistry

Organic Molecules: The Molecules of Life

Cell Structure and Function

Enzymes, Coenzymes, and Energy

Biochemical Pathways: Cellular Respiration

Biochemical Pathways: Photosynthesis

DNA and RNA: The Molecular Basis of Heredity

Cell Division: Proliferation and Reproduction

Patterns of Inheritance

Applications of Biotechnology

Diversity Within Species and Population Genetics

Evolution and Natural Selection

The Formation of Species and Evolutionary Change

Ecosystem Dynamics: The Flow of Energy and Matter

Community Interactions

Population Ecology

Evolutionary and Ecological Aspects of Behavior

The Origin of Life and the Evolution of Cells

The Classification and Evolution of Organisms

The Nature of Microorganisms

The Plant Kingdom

The Animal Kingdom

Materials Exchange in the Body

Nutrition: Food and Diet

Human Reproduction, Sex, and Sexuality

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The nervous system consists of the brain and spinal cord and the nervous system consists of nerves.