BIO 253 EXAM 1 EXAM PREP QUESTIONS AND
ANSWERS 2026 PRACTICE SOLUTION
VERIFIED RESULTS
◉ Physiology.
Answer: function of the body
◉ Homeostasis.
Answer: Maintenance of stable internal environment.
◉ positive feedback loop..
Answer: Enhances change in a system. (Child birth, contractions)
◉ Negative Feedback Loop..
Answer: Reduces change to maintain stability. (Blood pressure,
glucose have to do intervention)
◉ Element.
Answer: Matter with specific chemical properties.
◉ Atom.
, Answer: Smallest unit of an element with chemical properties.
◉ Atomic Structure.
Answer: Protons and neutrons in nucleus; electrons orbit.
◉ Ionic Bond.
Answer: Electrical attraction between oppositely charged ions.
◉ Covalent Bond.
Answer: Sharing of electrons between atoms.
◉ Hydrogen Bond.
Answer: Weak bond between polar molecules.
◉ pH Scale.
Answer: Measures acidity or alkalinity of a solution.
◉ Acids.
Answer: Substances that donate protons in solution.
◉ Bases.
Answer: Substances that accept protons in solution.
ANSWERS 2026 PRACTICE SOLUTION
VERIFIED RESULTS
◉ Physiology.
Answer: function of the body
◉ Homeostasis.
Answer: Maintenance of stable internal environment.
◉ positive feedback loop..
Answer: Enhances change in a system. (Child birth, contractions)
◉ Negative Feedback Loop..
Answer: Reduces change to maintain stability. (Blood pressure,
glucose have to do intervention)
◉ Element.
Answer: Matter with specific chemical properties.
◉ Atom.
, Answer: Smallest unit of an element with chemical properties.
◉ Atomic Structure.
Answer: Protons and neutrons in nucleus; electrons orbit.
◉ Ionic Bond.
Answer: Electrical attraction between oppositely charged ions.
◉ Covalent Bond.
Answer: Sharing of electrons between atoms.
◉ Hydrogen Bond.
Answer: Weak bond between polar molecules.
◉ pH Scale.
Answer: Measures acidity or alkalinity of a solution.
◉ Acids.
Answer: Substances that donate protons in solution.
◉ Bases.
Answer: Substances that accept protons in solution.
