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Chapter 24: Problem 3

What is the term for a hard covering or shell that provides protection and muscle attachment? a. apodeme b. fusiform c. exoskeleton d. endotherm

Short Answer

Expert verified
The correct answer is 'c. exoskeleton.'

Step by step solution

01

Title - Understand the Question

Read the question carefully. It asks for a term that describes a hard covering or shell providing protection and muscle attachment.
02

Title - Examine the Options

Consider each of the provided options one by one: a. apodeme b. fusiform c. exoskeleton d. endotherm
03

Title - Eliminate Incorrect Options

Eliminate the options that do not describe a hard shell or covering. - Apodeme: A structure for muscle attachment within arthropods but not a covering. - Fusiform: Describes a spindle-like shape, not a hard covering. - Endotherm: An organism capable of internal heat generation, not related to a hard shell.
04

Title - Confirm the Correct Answer

The remaining option is 'c. exoskeleton.' An exoskeleton is a hard outer structure that provides both protection and muscle attachment for many invertebrates.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Protection in Invertebrates
Invertebrates, such as insects and crustaceans, often have a unique way of protecting their bodies. Instead of having bones inside their bodies like vertebrates, they have a hard outer covering called an exoskeleton. This exoskeleton acts as a shield, safeguarding their soft internal tissues from injuries, predators, and environmental hazards.

The exoskeleton provides:
  • Defense against predators
  • Limitation to excessive water loss
  • Support for their structure and vital systems
Unlike soft-bodied organisms, invertebrates with exoskeletons can thrive in various environments. This protection allows them to be efficient and resilient predators or prey in their ecosystems.
Muscle Attachment
The exoskeleton is not just a protective shell; it also plays a critical role in muscle attachment. Within these exterior coatings, invertebrates have leverage points for muscle attachment, ensuring they can move efficiently.

The exoskeleton features:
  • Points where muscles anchor
  • Support to increase the force generated by muscles
  • Flexibility at joints for movement
Understanding this dual purpose of the exoskeleton helps to appreciate the complexity of invertebrate movement. Essentially, it serves as both armor and the framework to which muscles are securely fixed, enabling precise and powerful movements.
Arthropod Anatomy
Arthropods are a diverse group of invertebrates that include insects, spiders, and crustaceans. They are characterized by their segmented bodies, jointed appendages, and exoskeletons. This exoskeleton is made up of chitin, a durable and flexible material that facilitates growth through a process called molting.

Key parts of arthropod anatomy:
  • Segmented body: Divided into different regions like head, thorax, and abdomen
  • Jointed legs: Enable versatile and adaptable movement
  • Exoskeleton: Provides both protection and structure
Exoskeletons are vital for their survival, aiding in maintaining their shape and providing places for muscle attachment. These features make arthropods some of the most robust and adaptable creatures in various ecosystems around the world.

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Most popular questions from this chapter

Maintaining body heat is important for maintaining body functions in animals. Which of the following statements provides an example of how an animal can actively generate body heat? a. Triglycerides are used to store energy for later use. b. An animal produces metabolic waste energy in the form of heat. c. An animal has insulation, which helps it maintain a constant body temperature. d. An animal eats a large amount of high-fat foods to produce adipose tissue.

The body sizes of organisms vary and tends to be correlated with the region in which the organisms are found. Why do organisms at different latitudes tend to have different body sizes, and what is the relationship between heat loss and body size in an organism? a. Temperature varies by latitude, and body size affects heat retention and loss. Smaller organisms lose heat at a slower rate than larger organisms because they have a smaller surface area for their mass. b. Temperature varies by latitude, and body size affects heat retention and loss. Smaller organisms lose heat at a faster rate than larger organisms because they have a greater surface area for their mass. c. Temperature varies by latitude, and body size affects heat retention and loss. Larger organisms lose heat at a faster rate than smaller organisms because they have a greater surface area for their mass. d. Temperature varies by latitude, and body size affects heat retention and loss. Smaller organisms lose heat at a faster rate than larger organisms because they have a smaller surface area for their mass.

Which of the following statements most directly supports the claim that different species of organisms use different metabolic strategies to meet their energy requirements for growth, reproduction, and homeostasis? a. During cold periods, pond-dwelling animals can increase the number of unsaturated fatty acids in their cell membranes, while some plants make antifreeze proteins to prevent ice crystal formation in tissues. b. Bacteria lack introns, while many eukaryotic genes contain many of these intervening sequences. c. Carnivores have more teeth that are specialized for grinding food. d. Plants generally use starch molecules for storage while animals use glycogen and fats for storage.

What are the roles of vasodilation and vasoconstriction in maintaining body temperature? a. Vasodilation allows for radiation and evaporative heat loss, and vasoconstriction brings blood to the core to conserve heat by vital organs. b. Vasodilation brings blood to the core to conserve heat by vital organs, and vasoconstriction results in radiation and evaporative heat loss. c. Vasodilation results in the formation of an insulating layer between skin and internal organs causing heat conservation and brings blood to the core to conserve heat. d. Vasodilation results in radiation and evaporative heat loss, and vasoconstriction transfers heat from arteries to veins to warm blood returning to the heart.

A friend sneaks up behind you and scares you, speeding up your heart rate. How and why did this event influence cardiac muscle contraction? a. Muscle contraction speed increases as the enteric nervous system responds to local conditions and makes muscle contraction speed up or slow down. b. Muscle contraction speed increases as the autonomic nervous system responds to local conditions and makes muscle contraction speed up or slow down. c. Muscle contraction speed increases as the somatic nervous system responds to local conditions and makes muscle contraction speed up or slow down. d. Muscle contraction speed increases as the central nervous system responds to local conditions and makes muscle contraction speed up or slow down.
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