BIO 100 Exam 4 Study Guide Overview
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Animal Body Hierarchy - CORRECT ANSWER - Cells -> Tissues -> Organs -> Organ
Systems -> Organism
Homeostasis - CORRECT ANSWER - Homeostasis is the body's ability to maintain a
stable internal environment, even when external conditions change.
Negative Feedback Loop - CORRECT ANSWER - A process that reduces or shuts down a
response to bring the body back to balance. Example: When body temperature rises, the body
sweats to cool down.
Thermoregulation - CORRECT ANSWER - Endothermic animals generate their own heat
internally (e.g., humans). Ectothermic animals rely on external sources to regulate temperature
(e.g., reptiles).
Homeotherms vs. Heterotherms - CORRECT ANSWER - Homeotherms keep a constant
internal body temperature. Heterotherms allow their body temperature to vary with the
environment.
Function of the Digestive System - CORRECT ANSWER - Breaks down food, absorbs
nutrients, and eliminates waste.
Pathway of Food in Digestion - CORRECT ANSWER - Mouth -> Esophagus -> Stomach
-> Small Intestine -> Large Intestine -> Rectum -> Anus
Where Absorption Happens - CORRECT ANSWER - Most nutrient absorption occurs in
the small intestine.
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Animal Body Hierarchy - CORRECT ANSWER - Cells -> Tissues -> Organs -> Organ
Systems -> Organism
Homeostasis - CORRECT ANSWER - Homeostasis is the body's ability to maintain a
stable internal environment, even when external conditions change.
Negative Feedback Loop - CORRECT ANSWER - A process that reduces or shuts down a
response to bring the body back to balance. Example: When body temperature rises, the body
sweats to cool down.
Thermoregulation - CORRECT ANSWER - Endothermic animals generate their own heat
internally (e.g., humans). Ectothermic animals rely on external sources to regulate temperature
(e.g., reptiles).
Homeotherms vs. Heterotherms - CORRECT ANSWER - Homeotherms keep a constant
internal body temperature. Heterotherms allow their body temperature to vary with the
environment.
Function of the Digestive System - CORRECT ANSWER - Breaks down food, absorbs
nutrients, and eliminates waste.
Pathway of Food in Digestion - CORRECT ANSWER - Mouth -> Esophagus -> Stomach
-> Small Intestine -> Large Intestine -> Rectum -> Anus
Where Absorption Happens - CORRECT ANSWER - Most nutrient absorption occurs in
the small intestine.
