PHYS 261 Combined Quizzes 28/160
WEST COAST UNIVERSITY
PHYS 261 HUMAN PHYSIOLOGY
COMBINED QUIZZES 1-4 — 2026/2027 | 160 QUESTIONS | GRADED A+ | 100%
VERIFIED
160 Questions Quizzes 1-4 Comprehensive WCU Aligned
Chemistry & Cells Neurophysiology Muscle & Cardiac Organ Systems
PHYS 261 Course Overview
Quiz Structure Core Domains
✓ Quiz 1 (Ch. 1-2): Intro & Chemistry ● Homeostasis & Chemistry
✓ Quiz 2 (Ch. 4-5): Cell Physiology ● Cell Membrane & Transport
✓ Quiz 3 (Ch. 8-10): Nervous System ● Neurophysiology & Sensory
✓ Quiz 4 (Ch. 7, 22-23): Muscle & Organ Systems ● Muscular & Cardiac Physiology
✓ Total: 160 Questions ● Cardiovascular & Respiratory
✓ Multiple-Choice Format ● Renal & Digestive Systems
Introduction: PHYS 261 provides a comprehensive exploration of the fundamental principles governing human body function, from
cellular mechanisms to integrated organ system physiology. Mastery of this content is essential for students pursuing careers in nursing,
health sciences, and other healthcare professions.
Answer Format
All questions are presented in bold text for clear distinction and readability.
All correct answers are presented in bold and lime green, followed by clearly defined, physiologically accurate rationales
in italic format that reinforce homeostatic mechanisms, organ system functions, cellular processes, and clinical correlations
required for PHYS 261 quiz success.
Quiz 1: Introduction & Chemistry (Questions 1-40)
Quiz 1: Intro & Chemistry
1
Homeostasis is best defined as:
A) The ability to grow
B) The maintenance of a stable internal environment
, C) The process of reproduction
D) The ability to move
Correct Answer: B) The maintenance of a stable internal environment
Rationale: Homeostasis is the maintenance of a stable internal environment despite external changes.
Quiz 1: Intro & Chemistry
2
Negative feedback loops function to:
A) Amplify changes
B) Reverse changes to maintain set point
C) Create instability
D) Increase deviation
Correct Answer: B) Reverse changes to maintain set point
Rationale: Negative feedback reverses a deviation from the set point to maintain homeostasis.
Quiz 1: Intro & Chemistry
3
An example of positive feedback is:
A) Body temperature regulation
B) Blood glucose regulation
C) Childbirth (labor contractions)
D) Blood pressure regulation
Correct Answer: C) Childbirth (labor contractions)
Rationale: Childbirth involves positive feedback where contractions intensify until delivery occurs.
Quiz 1: Intro & Chemistry
4
The smallest living unit of structure and function is:
A) Atom
B) Molecule
C) Cell
D) Organ
Correct Answer: C) Cell
Rationale: The cell is the smallest unit of life capable of independent function.
Quiz 1: Intro & Chemistry
5
, An ion with a positive charge is called a:
A) Anion
B) Cation
C) Neutron
D) Isotope
Correct Answer: B) Cation
Rationale: Cations are positively charged ions (e.g., Na+, K+). Anions are negative.
Quiz 1: Intro & Chemistry
6
A covalent bond involves:
A) Transfer of electrons
B) Sharing of electrons
C) Attraction of opposites
D) Hydrogen bonding
Correct Answer: B) Sharing of electrons
Rationale: Covalent bonds involve the sharing of electron pairs between atoms.
Quiz 1: Intro & Chemistry
7
A pH of 3 indicates:
A) Neutral
B) Basic
C) Acidic
D) Alkaline
Correct Answer: C) Acidic
Rationale: pH < 7 is acidic. pH 3 is strongly acidic.
Quiz 1: Intro & Chemistry
8
The primary structure of a protein is determined by:
A) Hydrogen bonds
B) Sequence of amino acids
C) Folding
D) Disulfide bonds
Correct Answer: B) Sequence of amino acids
, Rationale: Primary structure is the specific linear sequence of amino acids.
Quiz 1: Intro & Chemistry
9
ATP functions as:
A) Genetic material
B) Energy currency of the cell
C) Structural protein
D) Enzyme
Correct Answer: B) Energy currency of the cell
Rationale: ATP (Adenosine Triphosphate) is the primary energy carrier in cells.
Quiz 1: Intro & Chemistry
10
DNA is composed of nucleotides containing:
A) Ribose
B) Deoxyribose
C) Glucose
D) Fructose
Correct Answer: B) Deoxyribose
Rationale: DNA contains deoxyribose sugar. RNA contains ribose.
Quiz 1: Intro & Chemistry
11
Triglycerides are composed of:
A) 3 fatty acids + glycerol
B) 2 fatty acids + glycerol
C) Amino acids
D) Nucleotides
Correct Answer: A) 3 fatty acids + glycerol
Rationale: Triglycerides consist of three fatty acids attached to a glycerol backbone.
Quiz 1: Intro & Chemistry
12
Steroids are a type of:
A) Protein
B) Lipid
WEST COAST UNIVERSITY
PHYS 261 HUMAN PHYSIOLOGY
COMBINED QUIZZES 1-4 — 2026/2027 | 160 QUESTIONS | GRADED A+ | 100%
VERIFIED
160 Questions Quizzes 1-4 Comprehensive WCU Aligned
Chemistry & Cells Neurophysiology Muscle & Cardiac Organ Systems
PHYS 261 Course Overview
Quiz Structure Core Domains
✓ Quiz 1 (Ch. 1-2): Intro & Chemistry ● Homeostasis & Chemistry
✓ Quiz 2 (Ch. 4-5): Cell Physiology ● Cell Membrane & Transport
✓ Quiz 3 (Ch. 8-10): Nervous System ● Neurophysiology & Sensory
✓ Quiz 4 (Ch. 7, 22-23): Muscle & Organ Systems ● Muscular & Cardiac Physiology
✓ Total: 160 Questions ● Cardiovascular & Respiratory
✓ Multiple-Choice Format ● Renal & Digestive Systems
Introduction: PHYS 261 provides a comprehensive exploration of the fundamental principles governing human body function, from
cellular mechanisms to integrated organ system physiology. Mastery of this content is essential for students pursuing careers in nursing,
health sciences, and other healthcare professions.
Answer Format
All questions are presented in bold text for clear distinction and readability.
All correct answers are presented in bold and lime green, followed by clearly defined, physiologically accurate rationales
in italic format that reinforce homeostatic mechanisms, organ system functions, cellular processes, and clinical correlations
required for PHYS 261 quiz success.
Quiz 1: Introduction & Chemistry (Questions 1-40)
Quiz 1: Intro & Chemistry
1
Homeostasis is best defined as:
A) The ability to grow
B) The maintenance of a stable internal environment
, C) The process of reproduction
D) The ability to move
Correct Answer: B) The maintenance of a stable internal environment
Rationale: Homeostasis is the maintenance of a stable internal environment despite external changes.
Quiz 1: Intro & Chemistry
2
Negative feedback loops function to:
A) Amplify changes
B) Reverse changes to maintain set point
C) Create instability
D) Increase deviation
Correct Answer: B) Reverse changes to maintain set point
Rationale: Negative feedback reverses a deviation from the set point to maintain homeostasis.
Quiz 1: Intro & Chemistry
3
An example of positive feedback is:
A) Body temperature regulation
B) Blood glucose regulation
C) Childbirth (labor contractions)
D) Blood pressure regulation
Correct Answer: C) Childbirth (labor contractions)
Rationale: Childbirth involves positive feedback where contractions intensify until delivery occurs.
Quiz 1: Intro & Chemistry
4
The smallest living unit of structure and function is:
A) Atom
B) Molecule
C) Cell
D) Organ
Correct Answer: C) Cell
Rationale: The cell is the smallest unit of life capable of independent function.
Quiz 1: Intro & Chemistry
5
, An ion with a positive charge is called a:
A) Anion
B) Cation
C) Neutron
D) Isotope
Correct Answer: B) Cation
Rationale: Cations are positively charged ions (e.g., Na+, K+). Anions are negative.
Quiz 1: Intro & Chemistry
6
A covalent bond involves:
A) Transfer of electrons
B) Sharing of electrons
C) Attraction of opposites
D) Hydrogen bonding
Correct Answer: B) Sharing of electrons
Rationale: Covalent bonds involve the sharing of electron pairs between atoms.
Quiz 1: Intro & Chemistry
7
A pH of 3 indicates:
A) Neutral
B) Basic
C) Acidic
D) Alkaline
Correct Answer: C) Acidic
Rationale: pH < 7 is acidic. pH 3 is strongly acidic.
Quiz 1: Intro & Chemistry
8
The primary structure of a protein is determined by:
A) Hydrogen bonds
B) Sequence of amino acids
C) Folding
D) Disulfide bonds
Correct Answer: B) Sequence of amino acids
, Rationale: Primary structure is the specific linear sequence of amino acids.
Quiz 1: Intro & Chemistry
9
ATP functions as:
A) Genetic material
B) Energy currency of the cell
C) Structural protein
D) Enzyme
Correct Answer: B) Energy currency of the cell
Rationale: ATP (Adenosine Triphosphate) is the primary energy carrier in cells.
Quiz 1: Intro & Chemistry
10
DNA is composed of nucleotides containing:
A) Ribose
B) Deoxyribose
C) Glucose
D) Fructose
Correct Answer: B) Deoxyribose
Rationale: DNA contains deoxyribose sugar. RNA contains ribose.
Quiz 1: Intro & Chemistry
11
Triglycerides are composed of:
A) 3 fatty acids + glycerol
B) 2 fatty acids + glycerol
C) Amino acids
D) Nucleotides
Correct Answer: A) 3 fatty acids + glycerol
Rationale: Triglycerides consist of three fatty acids attached to a glycerol backbone.
Quiz 1: Intro & Chemistry
12
Steroids are a type of:
A) Protein
B) Lipid
