BIO 155 - Chapter 3 Actual study set with
Questions and correct/verified Answers
Atoms - ANSWER-smallest unit of matter
Molecule - ANSWER-are two atoms bonded together by chemical bonds
Macromolecules - ANSWER-repeating molecules joined by chemical bonds
Organelles - ANSWER-Collections of macromolecules inside the cell that have a particular function
o Nucleus - job is to house, protect, and use our genetic material or DNA
o Mitochondria - responsible for breaking down proteins, carbs into a useable form of energy, this
process is called aerobic cellular respiration
Cells - ANSWER-smallest unit of life
Tissues - ANSWER-collection of cells working together to preform a function
o Connective Tissue - fat, muscle, nervous, and blood tissue
o Organs - formed from tissues that have a special job
Organ Systems - ANSWER-Organ come together to form these
o Digestive system
Organism - ANSWER-bunch of organ systems form this
Metabolism - ANSWER-sum of all chemical reactions in the body
Anabolism - ANSWER-you take a simple starting product and combine them together to make something
more complex; requires energy
Catabolism - ANSWER-start with something complex and break it down into simple products; this
releases energy (we gain energy)
Gastrointestinal Tract (GI tract) or Alimentary Canal - ANSWER-Organs which food travels, is broken
down, and absorbed
Accessory Structure - ANSWER-o Examples include the liver, gallbladder, and pancreas
o These organs make stuff for the digestive system
Functions of the Digestive System - ANSWER-· Secretion
· Ingestion
· Mechanical & Chemical Digestion
· Motility
· Absorption of Nutrients
· Elimination
Questions and correct/verified Answers
Atoms - ANSWER-smallest unit of matter
Molecule - ANSWER-are two atoms bonded together by chemical bonds
Macromolecules - ANSWER-repeating molecules joined by chemical bonds
Organelles - ANSWER-Collections of macromolecules inside the cell that have a particular function
o Nucleus - job is to house, protect, and use our genetic material or DNA
o Mitochondria - responsible for breaking down proteins, carbs into a useable form of energy, this
process is called aerobic cellular respiration
Cells - ANSWER-smallest unit of life
Tissues - ANSWER-collection of cells working together to preform a function
o Connective Tissue - fat, muscle, nervous, and blood tissue
o Organs - formed from tissues that have a special job
Organ Systems - ANSWER-Organ come together to form these
o Digestive system
Organism - ANSWER-bunch of organ systems form this
Metabolism - ANSWER-sum of all chemical reactions in the body
Anabolism - ANSWER-you take a simple starting product and combine them together to make something
more complex; requires energy
Catabolism - ANSWER-start with something complex and break it down into simple products; this
releases energy (we gain energy)
Gastrointestinal Tract (GI tract) or Alimentary Canal - ANSWER-Organs which food travels, is broken
down, and absorbed
Accessory Structure - ANSWER-o Examples include the liver, gallbladder, and pancreas
o These organs make stuff for the digestive system
Functions of the Digestive System - ANSWER-· Secretion
· Ingestion
· Mechanical & Chemical Digestion
· Motility
· Absorption of Nutrients
· Elimination
