Question 1

Statocysts contain cells that are

Accepted Answer

A) mechanoreceptors which function in orientation to gravity. 
B) chemoreceptors used in selecting migration routes. 
C) photoreceptors used in setting biological rhythms. 
D) thermoreceptors used in prey detection. 
E) chemoreceptors used in acid-base balance. 
A) mechanoreceptors which function in orientation to gravity. 
B) chemoreceptors used in selecting migration routes. 
C) photoreceptors used in setting biological rhythms. 
D) thermoreceptors used in prey detection. 
E) chemoreceptors used in acid-base balance.

Question 2

Compared to viewing a distant object,viewing an object held within 5 cm of the eye requires a lens that

Accepted Answer

A) has been flattened, as a result of contraction of the ciliary muscles. 
B) has been made more spherical, as a result of contraction of the ciliary muscles. 
C) has been flattened, as a result of relaxation of the ciliary muscles. 
D) has been made more spherical, as a result of relaxation of the ciliary muscles. 
E) does not change its shape. 
A) has been flattened, as a result of contraction of the ciliary muscles. 
B) has been made more spherical, as a result of contraction of the ciliary muscles. 
C) has been flattened, as a result of relaxation of the ciliary muscles. 
D) has been made more spherical, as a result of relaxation of the ciliary muscles. 
E) does not change its shape.

Question 3

Dizziness is a perceived sensation that can occur when

Accepted Answer

A) the hair cells in the cochlea move more than their normal limits. 
B) moving fluid in the semicircular canals encounters a stationary cupula. 
C) rods and cones provide information that does not correspond with information received by cochlear hair cells. 
D) the basilar membrane makes physical contact with the tectorial membrane. 
E) the utricle is horizontal but the saccule is vertical. 
A) the hair cells in the cochlea move more than their normal limits. 
B) moving fluid in the semicircular canals encounters a stationary cupula. 
C) rods and cones provide information that does not correspond with information received by cochlear hair cells. 
D) the basilar membrane makes physical contact with the tectorial membrane. 
E) the utricle is horizontal but the saccule is vertical.

Question 4

The muscle spindle is

Accepted Answer

A) an actin-myosin complex. 
B) a troponin-tropomyosin complex. 
C) axons wound around muscle fibres. 
D) a group of dendrite-encircled muscle fibres. 
E) a muscle cell that makes up a muscle group. 
A) an actin-myosin complex. 
B) a troponin-tropomyosin complex. 
C) axons wound around muscle fibres. 
D) a group of dendrite-encircled muscle fibres. 
E) a muscle cell that makes up a muscle group.

Question 5

An endoskeleton is the primary body support for the

Accepted Answer

A) annelids, including earthworms. 
B) insects, including beetles. 
C) cartilaginous fishes, including sharks. 
D) bivalves, including clams. 
E) crustaceans, including lobsters. 
A) annelids, including earthworms. 
B) insects, including beetles. 
C) cartilaginous fishes, including sharks. 
D) bivalves, including clams. 
E) crustaceans, including lobsters.

Question 6

During muscle contraction,
I.actin filaments cross the M line.
II.the Z lines move closer together.
III.myosin forms cross bridges with actin.
IV.actin and myosin coil around each other.

Accepted Answer

A) I, II, and IV 
B) I, II, and III 
C) I and II 
D) II only 
E) I only 
A) I, II, and IV 
B) I, II, and III 
C) I and II 
D) II only 
E) I only

Exam 50: Sensory and Motor Mechanisms

Statocysts contain cells that are

Compared to viewing a distant object,viewing an object held within 5 cm of the eye requires a lens that

Dizziness is a perceived sensation that can occur when

The muscle spindle is

An endoskeleton is the primary body support for the

During muscle contraction, I.actin filaments cross the M line. II.the Z lines move closer together. III.myosin forms cross bridges with actin. IV.actin and myosin coil around each other.

Introduction: Evolution and Themes of Biology

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

From Gene to Protein

Regulation of Gene Expression

Viruses

DNA Tools and Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Plant Structure,Growth,and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons,Synapses,and Signalling

Nervous Systems

Animal Behaviour

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

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