BIO 253 EXAM 1 ACTUAL EXAM SCRIPT 2026
COMPLETE QUESTIONS AND SOLUTIONS
GRADED A+
◉ Physiology.
Answer: The study of the function of body parts.
◉ Structure determines function.
Answer: Every living organism's structures are organized in a
particular fashion in order to carry out a specific function.
◉ Atom.
Answer: The smallest particle of an element.
◉ Molecule.
Answer: A particle composed of 2 or more joined atoms.
◉ Macromolecule.
Answer: A large molecule.
◉ Organelle.
,Answer: A small organ of a cell that performs a particular function.
◉ Cell.
Answer: The basic unit of structure and function of living organisms.
◉ Tissue.
Answer: A group of similar cells that performs a specialized
function.
◉ Organ.
Answer: A structure consisting of a group of tissues that performs a
specialized function.
◉ Organ System.
Answer: A group of organs that act together to carry out a
specialized function.
◉ Human Organism.
Answer: The most complex level; an individual living thing.
◉ Homeostasis.
Answer: The tendency of an organism to maintain a relatively stable
internal environment despite external changes.
,◉ Homeostatic range.
Answer: Conditions kept compatible with life, near a 'set point'
value.
◉ Receptors.
Answer: Sense change in the environment (stimuli).
◉ Control Center.
Answer: Regulates the set point of the variables.
◉ Effectors.
Answer: Organs that act in response to changes.
◉ Integumentary System.
Answer: Includes skin, hair, nails, sweat glands, and sebaceous
glands; functions in protection, regulation of body temperature, and
synthesis of Vitamin D.
◉ Skeletal System.
Answer: Includes bones, tendons, ligaments, and cartilages;
functions in support, protection, movement, storage, and
hematopoiesis.
, ◉ Muscular System.
Answer: Includes skeletal muscles; functions in movement and heat
production.
◉ Nervous System.
Answer: Includes brain, spinal cord, and nerves; functions in
coordination of body parts and information processing.
◉ Cardiovascular System.
Answer: Includes heart and blood vessels; functions in transport of
nutrients and wastes.
◉ Respiratory System.
Answer: Includes nose, lungs, trachea, and alveoli; functions in
exchange of gases and maintenance of blood.
◉ Urinary System.
Answer: Includes kidneys, ureters, bladder, and urethra; functions in
excretion and maintenance of blood characteristics.
◉ Digestive System.
COMPLETE QUESTIONS AND SOLUTIONS
GRADED A+
◉ Physiology.
Answer: The study of the function of body parts.
◉ Structure determines function.
Answer: Every living organism's structures are organized in a
particular fashion in order to carry out a specific function.
◉ Atom.
Answer: The smallest particle of an element.
◉ Molecule.
Answer: A particle composed of 2 or more joined atoms.
◉ Macromolecule.
Answer: A large molecule.
◉ Organelle.
,Answer: A small organ of a cell that performs a particular function.
◉ Cell.
Answer: The basic unit of structure and function of living organisms.
◉ Tissue.
Answer: A group of similar cells that performs a specialized
function.
◉ Organ.
Answer: A structure consisting of a group of tissues that performs a
specialized function.
◉ Organ System.
Answer: A group of organs that act together to carry out a
specialized function.
◉ Human Organism.
Answer: The most complex level; an individual living thing.
◉ Homeostasis.
Answer: The tendency of an organism to maintain a relatively stable
internal environment despite external changes.
,◉ Homeostatic range.
Answer: Conditions kept compatible with life, near a 'set point'
value.
◉ Receptors.
Answer: Sense change in the environment (stimuli).
◉ Control Center.
Answer: Regulates the set point of the variables.
◉ Effectors.
Answer: Organs that act in response to changes.
◉ Integumentary System.
Answer: Includes skin, hair, nails, sweat glands, and sebaceous
glands; functions in protection, regulation of body temperature, and
synthesis of Vitamin D.
◉ Skeletal System.
Answer: Includes bones, tendons, ligaments, and cartilages;
functions in support, protection, movement, storage, and
hematopoiesis.
, ◉ Muscular System.
Answer: Includes skeletal muscles; functions in movement and heat
production.
◉ Nervous System.
Answer: Includes brain, spinal cord, and nerves; functions in
coordination of body parts and information processing.
◉ Cardiovascular System.
Answer: Includes heart and blood vessels; functions in transport of
nutrients and wastes.
◉ Respiratory System.
Answer: Includes nose, lungs, trachea, and alveoli; functions in
exchange of gases and maintenance of blood.
◉ Urinary System.
Answer: Includes kidneys, ureters, bladder, and urethra; functions in
excretion and maintenance of blood characteristics.
◉ Digestive System.
