Question 1

Which of the following is TRUE of cardiac muscle?

Accepted Answer

A)  Its cells contain large numbers of mitochondria. 
B)  Its cells are tapered at each end. 
C)  It is not striated, like skeletal muscle. 
D)  It is under voluntary control. 
A)  Its cells contain large numbers of mitochondria. 
B)  Its cells are tapered at each end. 
C)  It is not striated, like skeletal muscle. 
D)  It is under voluntary control.

Question 2

List the steps in the process by which a bone heals.

Accepted Answer

A clot forms, osteoclasts eat

Question 3

When you break your leg, a thickened area forms around the outside of the bone. Over a period of time, this thickened area

Accepted Answer

A)  is digested by enzymes secreted by the muscles. 
B)  forms new tendons, ligaments, and/or muscles. 
C)  is dissolved by osteoclasts as osteoblasts add new bone. 
D)  moves to the skin surface and is shed as dead skin. 
E)  becomes a permanent part of the spongy bone. 
A)  is digested by enzymes secreted by the muscles. 
B)  forms new tendons, ligaments, and/or muscles. 
C)  is dissolved by osteoclasts as osteoblasts add new bone. 
D)  moves to the skin surface and is shed as dead skin. 
E)  becomes a permanent part of the spongy bone.

Question 4

The hard, outer shell of vertebrate bone

Accepted Answer

A)  is spongy bone. 
B)  is made of glucosamine. 
C)  does not contain osteons. 
D)  is compact bone. 
A)  is spongy bone. 
B)  is made of glucosamine. 
C)  does not contain osteons. 
D)  is compact bone.

Question 5

How does a muscle return to its extended condition after contracting?

Accepted Answer

It is pulled back to

Question 6

Some joints, such as those joining the bones of the skull, are immobile and do not allow the two bones involved to move.

Accepted Answer

A) True 
 B)False

Question 7

Earthworms and slugs move by

Accepted Answer

A)  stretching their longitudinal muscles and contracting their circular muscles. 
B)  contracting their cilia. 
C)  alternating contractions of longitudinal and circular muscles. 
D)  contracting extensor and flexor muscles attached to their endoskeleton. 
A)  stretching their longitudinal muscles and contracting their circular muscles. 
B)  contracting their cilia. 
C)  alternating contractions of longitudinal and circular muscles. 
D)  contracting extensor and flexor muscles attached to their endoskeleton.

Question 8

Arrange these muscle tissue groupings in order, from most inclusive to least inclusive: sarcomere, motor unit, thick and thin filaments, myofibril, muscle fiber.

Accepted Answer

motor unit, muscle f

Question 9

When lifting a heavy object, the strength of leg muscle contractions is determined by the

Accepted Answer

A)  number of thick and thin filaments involved in each sarcomere during contraction. 
B)  amount of ATP used by each active sarcomere during muscle contraction. 
C)  number of calcium ions released by the sarcoplasmic reticulum. 
D)  frequency of action potentials and number of muscle fibers stimulated. 
A)  number of thick and thin filaments involved in each sarcomere during contraction. 
B)  amount of ATP used by each active sarcomere during muscle contraction. 
C)  number of calcium ions released by the sarcoplasmic reticulum. 
D)  frequency of action potentials and number of muscle fibers stimulated.

Question 10

In skeletal and cardiac muscles, relaxation occurs as____________ ions are pumped back into the sarcoplasmic reticulum.

Accepted Answer

A)  potassium 
B)  chloride 
C)  sodium 
D)  calcium 
A)  potassium 
B)  chloride 
C)  sodium 
D)  calcium

Exam 41: Action and Support: the Muscles and Skeleton

Which of the following is TRUE of cardiac muscle?

List the steps in the process by which a bone heals.

When you break your leg, a thickened area forms around the outside of the bone. Over a period of time, this thickened area

The hard, outer shell of vertebrate bone

How does a muscle return to its extended condition after contracting?

Some joints, such as those joining the bones of the skull, are immobile and do not allow the two bones involved to move.

Earthworms and slugs move by

Arrange these muscle tissue groupings in order, from most inclusive to least inclusive: sarcomere, motor unit, thick and thin filaments, myofibril, muscle fiber.

When lifting a heavy object, the strength of leg muscle contractions is determined by the

In skeletal and cardiac muscles, relaxation occurs as____________ ions are pumped back into the sarcoplasmic reticulum.

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

DNA: The Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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