Principles of Biology II: Organisms, Ecology, and Diversity Final Exam,1 Key
(Principles of Biology II Organisms, Ecology, and Diversity Final Exam, KeyConcepts: 2026-2027 )
Concepts
Study online at https://quizlet.com/_igekr7
1. Animal Behavior Animal behavior and communication refer to the ways animals act and interact
and Communica- with each other and their environment. Behavior includes all observable actions,
tion while communication is the process by which animals send and receive signals,
such as sounds, scents, or body movements, to share information with others.
2. Animal En- Animal endocrine glands are organs that release hormones directly into the
docrine Glands bloodstream. These glands, such as the pituitary, thyroid, and adrenal glands,
help regulate activities like growth, metabolism, and reproduction by controlling
the release of specific hormones.
3. Animal Hor- Animal hormones can be classified based on their chemical structure, such as
mone Classifica- peptides, steroids, or amines. Their production, release, and action are tightly
tion and Regula- regulated by feedback mechanisms, ensuring proper balance of physiological
tion processes within the body.
4. Hypothalamus-Pi- The hypothalamus-pituitary axis is the system connecting the hypothalamus and
tuitary Axis the pituitary gland. It regulates the release of hormones that control growth,
stress, reproduction, and metabolism in animals.
5. Releasing Hor- A releasing hormone is a hormone secreted by the hypothalamus that signals the
mone pituitary gland to produce and release specific hormones.
6. Coelom A coelom is a fluid-filled body cavity that is completely lined with tissue derived
from the mesoderm.
7. Osmoregulation Osmoregulation is the process by which aquatic animals regulate the balance of
water and salts in their bodies to maintain homeostasis.
8. Muscular System The muscular system is made up of muscles that contract to produce movement,
maintain body posture, and support adaptation to life on land.
9. Skeletal Support Skeletal support refers to structures in animals, such as bones or exoskeletons,
that provide body shape, protect internal organs, and aid in movement on land.
3/31/2026, 11:41:53 AM 3/31/2026, 11:41:55 AM 3/31/2026, 11:41:51 AM
, Principles of Biology II: Organisms, Ecology, and Diversity Final Exam,2 Key
(Principles of Biology II Organisms, Ecology, and Diversity Final Exam, KeyConcepts: 2026-2027 )
Concepts
Study online at https://quizlet.com/_igekr7
10. Temperature Temperature regulation is the process by which animals maintain a stable internal
Regulation body temperature despite changes in the environment.
11. Animal Physiolo- Animal physiology and internal regulation involves the processes and mecha-
gy and Internal nisms by which animals perform their vital functions, such as circulation, diges-
Regulation tion, and breathing, and maintain stable internal conditions (homeostasis).
12. Circulatory Sys- Circulatory system types refer to the different ways animals transport fluids
tem Types and through their bodies, such as open and closed systems. Open circulatory systems
Components use hemolymph that bathes organs directly in body cavities, while closed circula-
tory systems circulate blood through a continuous system of vessels. Components
of these systems include the heart, blood or hemolymph, vessels, and sometimes
specialized organs for filtration or gas exchange.
13. Gas Exchange Gas exchange is the process by which animals take in oxygen from their surround-
and Transport ings and release carbon dioxide. This usually happens across specialized surfaces
such as gills or lungs. Gas transport refers to the movement of these gases by the
circulatory system, where oxygen is carried from the lungs or gills to body tissues
and carbon dioxide is carried from the tissues back to the respiratory surfaces to
be expelled.
14. Oxygen Trans- Oxygen transport is the process by which oxygen is carried from the respiratory
port organs to body tissues, primarily through the blood using respiratory pigments
such as hemoglobin or hemocyanin.
15. Animal Metabo- Animal metabolism and thermoregulation refer to the chemical processes that
lism and Ther- maintain life and the mechanisms animals use to regulate their body temperature.
moregulation This field examines how animals produce and use energy and how they maintain
a stable internal temperature.
16. Thermal Toler-
ance Limits
3/31/2026, 11:41:53 AM 3/31/2026, 11:41:55 AM 3/31/2026, 11:41:51 AM
, Principles of Biology II: Organisms, Ecology, and Diversity Final Exam,3 Key
(Principles of Biology II Organisms, Ecology, and Diversity Final Exam, KeyConcepts: 2026-2027 )
Concepts
Study online at https://quizlet.com/_igekr7
Thermal tolerance limits are the highest and lowest temperatures at which an
animal can maintain normal function before experiencing physiological stress,
loss of viability, or health decline.
17. Acid-Base Regu- Acid-base regulation is the process by which the kidneys maintain the pH of body
lation fluids by excreting hydrogen ions and reabsorbing bicarbonate.
18. Aldosterone Aldosterone is a hormone that increases sodium reabsorption and potassium
secretion in the kidneys, helping to regulate blood pressure and fluid balance.
19. Renin-An- The renin-angiotensin-aldosterone system is a hormone system that regulates
giotensin-Aldos- blood pressure and fluid balance by controlling sodium and water reabsorption
terone System in the kidneys.
20. Muscle Structure Muscle structure refers to the arrangement of muscle fibers, connective tissue,
and Contraction blood vessels, and nerves that make up a muscle. Muscle contraction is the
process by which muscle fibers shorten and generate force, usually in response
to signals from the nervous system. This process depends on the interaction
between actin and myosin proteins within muscle cells, enabling movement and
support in animals.
21. Excitation-Con- Excitation-contraction coupling is the sequence of events that links the electrical
traction Coupling stimulation of a muscle fiber to the mechanical process of contraction.
22. Myosin Myosin is a thick protein filament in muscle cells that binds to actin to produce
muscle contraction. Its heads attach to actin and use energy from ATP to generate
movement.
23. Sarcomere A sarcomere is the basic contractile unit of striated muscle, consisting of repeating
segments of actin and myosin filaments. It is located between two Z lines and is
responsible for generating muscle contraction.
24.
3/31/2026, 11:41:53 AM 3/31/2026, 11:41:55 AM 3/31/2026, 11:41:51 AM
, Principles of Biology II: Organisms, Ecology, and Diversity Final Exam,4 Key
(Principles of Biology II Organisms, Ecology, and Diversity Final Exam, KeyConcepts: 2026-2027 )
Concepts
Study online at https://quizlet.com/_igekr7
Neuromuscular Neuromuscular control is the coordination between the nervous system and mus-
Control and cles to produce and regulate movement. It involves the transmission of electrical
Movement signals from nerves to muscles, causing them to contract or relax as needed.
Regulation Movement regulation ensures that muscles work together in a controlled manner,
enabling animals to perform precise and adaptive movements.
25. Muscle Contrac- Muscle contraction is the process in which muscle fibers shorten or generate
tion tension in response to stimulation, resulting in movement or force.
26. Animal Repro- Animal reproduction and development involves the processes through which an-
duction and De- imals produce offspring and how these offspring grow and mature into adults. It
velopment includes mechanisms such as gamete production, fertilization, embryonic growth,
and development.
27. Animal Repro- Animal reproductive strategies refer to the evolutionary methods and behaviors
ductive Strate- animals use to produce offspring. These strategies include the number of off-
gies spring produced, the amount of parental care given, timing of reproduction, and
mating systems. The goal is to maximize offspring survival and ensure species
continuation.
28. Parental Invest- Parental investment refers to the time, energy, and resources that parents allocate
ment to their offspring to enhance their development and increase chances of survival.
29. Zygote Zygote is the single cell formed when a sperm fertilizes an egg, marking the start
of a new organism's development.
30. Modes of Repro- Modes of reproduction in animals refer to the different ways animals produce
duction in Ani- offspring, including sexual and asexual reproduction. In sexual reproduction,
mals offspring are formed through the union of male and female gametes, while
in asexual reproduction, offspring are produced from a single parent without
gamete fusion.
3/31/2026, 11:41:53 AM 3/31/2026, 11:41:55 AM 3/31/2026, 11:41:51 AM
(Principles of Biology II Organisms, Ecology, and Diversity Final Exam, KeyConcepts: 2026-2027 )
Concepts
Study online at https://quizlet.com/_igekr7
1. Animal Behavior Animal behavior and communication refer to the ways animals act and interact
and Communica- with each other and their environment. Behavior includes all observable actions,
tion while communication is the process by which animals send and receive signals,
such as sounds, scents, or body movements, to share information with others.
2. Animal En- Animal endocrine glands are organs that release hormones directly into the
docrine Glands bloodstream. These glands, such as the pituitary, thyroid, and adrenal glands,
help regulate activities like growth, metabolism, and reproduction by controlling
the release of specific hormones.
3. Animal Hor- Animal hormones can be classified based on their chemical structure, such as
mone Classifica- peptides, steroids, or amines. Their production, release, and action are tightly
tion and Regula- regulated by feedback mechanisms, ensuring proper balance of physiological
tion processes within the body.
4. Hypothalamus-Pi- The hypothalamus-pituitary axis is the system connecting the hypothalamus and
tuitary Axis the pituitary gland. It regulates the release of hormones that control growth,
stress, reproduction, and metabolism in animals.
5. Releasing Hor- A releasing hormone is a hormone secreted by the hypothalamus that signals the
mone pituitary gland to produce and release specific hormones.
6. Coelom A coelom is a fluid-filled body cavity that is completely lined with tissue derived
from the mesoderm.
7. Osmoregulation Osmoregulation is the process by which aquatic animals regulate the balance of
water and salts in their bodies to maintain homeostasis.
8. Muscular System The muscular system is made up of muscles that contract to produce movement,
maintain body posture, and support adaptation to life on land.
9. Skeletal Support Skeletal support refers to structures in animals, such as bones or exoskeletons,
that provide body shape, protect internal organs, and aid in movement on land.
3/31/2026, 11:41:53 AM 3/31/2026, 11:41:55 AM 3/31/2026, 11:41:51 AM
, Principles of Biology II: Organisms, Ecology, and Diversity Final Exam,2 Key
(Principles of Biology II Organisms, Ecology, and Diversity Final Exam, KeyConcepts: 2026-2027 )
Concepts
Study online at https://quizlet.com/_igekr7
10. Temperature Temperature regulation is the process by which animals maintain a stable internal
Regulation body temperature despite changes in the environment.
11. Animal Physiolo- Animal physiology and internal regulation involves the processes and mecha-
gy and Internal nisms by which animals perform their vital functions, such as circulation, diges-
Regulation tion, and breathing, and maintain stable internal conditions (homeostasis).
12. Circulatory Sys- Circulatory system types refer to the different ways animals transport fluids
tem Types and through their bodies, such as open and closed systems. Open circulatory systems
Components use hemolymph that bathes organs directly in body cavities, while closed circula-
tory systems circulate blood through a continuous system of vessels. Components
of these systems include the heart, blood or hemolymph, vessels, and sometimes
specialized organs for filtration or gas exchange.
13. Gas Exchange Gas exchange is the process by which animals take in oxygen from their surround-
and Transport ings and release carbon dioxide. This usually happens across specialized surfaces
such as gills or lungs. Gas transport refers to the movement of these gases by the
circulatory system, where oxygen is carried from the lungs or gills to body tissues
and carbon dioxide is carried from the tissues back to the respiratory surfaces to
be expelled.
14. Oxygen Trans- Oxygen transport is the process by which oxygen is carried from the respiratory
port organs to body tissues, primarily through the blood using respiratory pigments
such as hemoglobin or hemocyanin.
15. Animal Metabo- Animal metabolism and thermoregulation refer to the chemical processes that
lism and Ther- maintain life and the mechanisms animals use to regulate their body temperature.
moregulation This field examines how animals produce and use energy and how they maintain
a stable internal temperature.
16. Thermal Toler-
ance Limits
3/31/2026, 11:41:53 AM 3/31/2026, 11:41:55 AM 3/31/2026, 11:41:51 AM
, Principles of Biology II: Organisms, Ecology, and Diversity Final Exam,3 Key
(Principles of Biology II Organisms, Ecology, and Diversity Final Exam, KeyConcepts: 2026-2027 )
Concepts
Study online at https://quizlet.com/_igekr7
Thermal tolerance limits are the highest and lowest temperatures at which an
animal can maintain normal function before experiencing physiological stress,
loss of viability, or health decline.
17. Acid-Base Regu- Acid-base regulation is the process by which the kidneys maintain the pH of body
lation fluids by excreting hydrogen ions and reabsorbing bicarbonate.
18. Aldosterone Aldosterone is a hormone that increases sodium reabsorption and potassium
secretion in the kidneys, helping to regulate blood pressure and fluid balance.
19. Renin-An- The renin-angiotensin-aldosterone system is a hormone system that regulates
giotensin-Aldos- blood pressure and fluid balance by controlling sodium and water reabsorption
terone System in the kidneys.
20. Muscle Structure Muscle structure refers to the arrangement of muscle fibers, connective tissue,
and Contraction blood vessels, and nerves that make up a muscle. Muscle contraction is the
process by which muscle fibers shorten and generate force, usually in response
to signals from the nervous system. This process depends on the interaction
between actin and myosin proteins within muscle cells, enabling movement and
support in animals.
21. Excitation-Con- Excitation-contraction coupling is the sequence of events that links the electrical
traction Coupling stimulation of a muscle fiber to the mechanical process of contraction.
22. Myosin Myosin is a thick protein filament in muscle cells that binds to actin to produce
muscle contraction. Its heads attach to actin and use energy from ATP to generate
movement.
23. Sarcomere A sarcomere is the basic contractile unit of striated muscle, consisting of repeating
segments of actin and myosin filaments. It is located between two Z lines and is
responsible for generating muscle contraction.
24.
3/31/2026, 11:41:53 AM 3/31/2026, 11:41:55 AM 3/31/2026, 11:41:51 AM
, Principles of Biology II: Organisms, Ecology, and Diversity Final Exam,4 Key
(Principles of Biology II Organisms, Ecology, and Diversity Final Exam, KeyConcepts: 2026-2027 )
Concepts
Study online at https://quizlet.com/_igekr7
Neuromuscular Neuromuscular control is the coordination between the nervous system and mus-
Control and cles to produce and regulate movement. It involves the transmission of electrical
Movement signals from nerves to muscles, causing them to contract or relax as needed.
Regulation Movement regulation ensures that muscles work together in a controlled manner,
enabling animals to perform precise and adaptive movements.
25. Muscle Contrac- Muscle contraction is the process in which muscle fibers shorten or generate
tion tension in response to stimulation, resulting in movement or force.
26. Animal Repro- Animal reproduction and development involves the processes through which an-
duction and De- imals produce offspring and how these offspring grow and mature into adults. It
velopment includes mechanisms such as gamete production, fertilization, embryonic growth,
and development.
27. Animal Repro- Animal reproductive strategies refer to the evolutionary methods and behaviors
ductive Strate- animals use to produce offspring. These strategies include the number of off-
gies spring produced, the amount of parental care given, timing of reproduction, and
mating systems. The goal is to maximize offspring survival and ensure species
continuation.
28. Parental Invest- Parental investment refers to the time, energy, and resources that parents allocate
ment to their offspring to enhance their development and increase chances of survival.
29. Zygote Zygote is the single cell formed when a sperm fertilizes an egg, marking the start
of a new organism's development.
30. Modes of Repro- Modes of reproduction in animals refer to the different ways animals produce
duction in Ani- offspring, including sexual and asexual reproduction. In sexual reproduction,
mals offspring are formed through the union of male and female gametes, while
in asexual reproduction, offspring are produced from a single parent without
gamete fusion.
3/31/2026, 11:41:53 AM 3/31/2026, 11:41:55 AM 3/31/2026, 11:41:51 AM
