1
Ivy Tech APHY 101 Final Exam Actual Exam
2025/2026 – Complete Exam-Style Questions
with Detailed Rationales | 100% Verified |
Pass Guaranteed – A+ Graded
[SECTION 1: Introduction to A&P, Homeostasis & Chemistry — Questions 1-15]
Q1: Which of the following best describes the anatomical position used as a standard reference in
the human body?
A. Body standing upright, arms hanging at sides, palms facing forward, and feet flat on the floor.
B. Body lying down (supine), arms at sides, palms facing backward.
C. Body standing upright, arms raised above head, palms facing backward.
D. Body sitting erect, hands resting on lap, palms facing down.
C. [Correct answer] [CORRECT]
Correct Answer: A
Rationale: The standard anatomical position requires the body to be erect (standing), facing
forward, with arms at the sides and palms facing forward (supinated). This position provides a
consistent frame of reference for describing anatomical locations and directional terms. Option B
describes the supine position but with incorrect hand placement. Option C and D describe
variations that do not align with the standard reference point required for Ivy Tech APHY 101
curriculum and universal medical communication.
Q2: A patient is experiencing severe dehydration. This condition disrupts homeostasis by altering
which of the following physiological variables?
A. Blood pressure and osmolarity
B. Body temperature and heart rate only
C. Blood glucose levels
D. Respiratory rate primarily
A. [Correct answer] [CORRECT]
,2
Correct Answer: A
Rationale: Dehydration primarily reduces blood volume, leading to a decrease in blood pressure
and an increase in blood osmolarity (concentration of solutes). Homeostasis relies on the balance
of fluids and electrolytes; disrupting this balance affects cardiovascular stability and cellular
hydration. While body temperature and heart rate may change secondarily, they are not the
primary variables directly altered by the loss of plasma volume. Blood glucose is regulated
separately by insulin and glucagon.
Q3: Which type of chemical bond is responsible for the unique properties of water, such as high
specific heat and cohesion, and is formed between slightly positive and slightly negative atoms?
A. Ionic bond
B. Hydrogen bond
C. Covalent bond
D. Polar covalent bond
C. [Correct answer] [CORRECT]
Correct Answer: B
Rationale: Hydrogen bonds are weak attractions between a hydrogen atom (which is slightly
positive) in one molecule and an electronegative atom (like oxygen or nitrogen, which is slightly
negative) in another molecule. These bonds are responsible for water's high heat capacity, surface
tension, and solvent properties, which are critical for maintaining body temperature and
transporting substances in physiological systems. Ionic bonds involve electron transfer, covalent
bonds involve sharing, and polar covalent bonds create the polarity necessary for hydrogen
bonds but are not the attraction themselves.
Q4: In a chemical reaction, a substance that loses electrons is said to be:
A. Reduced
B. Oxidized
C. Ionized
D. Stabilized
,3
C. [Correct answer] [CORRECT]
Correct Answer: B
Rationale: Oxidation is defined as the loss of electrons during a chemical reaction, while
reduction is the gain of electrons. A helpful mnemonic taught in APHY 101 is "OIL RIG"
(Oxidation Is Loss, Reduction Is Gain). These reactions often occur together (redox reactions)
and are fundamental to cellular respiration, where glucose is oxidized to release energy. Option A
is the opposite process, and C and D do not describe electron transfer changes.
Q5: Which pH value is considered strongly acidic and represents a higher concentration of
hydrogen ions ([H+]) than a pH of 4?
A. pH 6
B. pH 7
C. pH 2
D. pH 9
C. [Correct answer] [CORRECT]
Correct Answer: C
Rationale: The pH scale is logarithmic, meaning each whole number change represents a tenfold
change in hydrogen ion concentration. A lower pH indicates a higher concentration of H+ ions
and therefore greater acidity. A pH of 2 is ten times more acidic than a pH of 3 and one hundred
times more acidic than a pH of 4. Options A and B are closer to neutral or alkaline, and Option D
is alkaline (basic).
Q6: Which of the following organic molecules is the body's primary source of quick energy and
is composed of carbon, hydrogen, and oxygen in a 1:2:1 ratio?
A. Lipids
B. Proteins
C. Carbohydrates
D. Nucleic Acids
, 4
C. [Correct answer] [CORRECT]
Correct Answer: C
Rationale: Carbohydrates, including monosaccharides like glucose, are the body's primary and
most efficient source of immediate energy (ATP) through cellular respiration. Their chemical
formula typically follows the ratio CH2O. Lipids are used for long-term energy storage and
insulation, proteins for structure and enzymes, and nucleic acids for genetic information.
Understanding macronutrient functions is a core objective of the chemistry unit in Ivy Tech's
APHY 101.
Q7: Enzymes are biological catalysts that speed up metabolic reactions by:
A. Increasing the activation energy required for the reaction.
B. Lowering the activation energy required for the reaction.
C. Increasing the temperature of the cell.
D. Changing the pH of the cytoplasm.
C. [Correct answer] [CORRECT]
Correct Answer: B
Rationale: Enzymes function by lowering the activation energy, which is the amount of energy
needed to start a chemical reaction. This allows reactions to proceed rapidly at the body's normal
temperature (37°C). Enzymes are not consumed in the reaction and are specific to their
substrates. Option A is incorrect because lowering activation energy is the key; increasing it
would slow the reaction. Options C and D describe physical/chemical changes that could
denature enzymes rather than their mechanism of action.
Q8: A neutral atom of Calcium (Ca) has an atomic number of 20. How many electrons does it
have in its outermost (valence) shell?
A. 2
B. 8
C. 10
D. 20
Ivy Tech APHY 101 Final Exam Actual Exam
2025/2026 – Complete Exam-Style Questions
with Detailed Rationales | 100% Verified |
Pass Guaranteed – A+ Graded
[SECTION 1: Introduction to A&P, Homeostasis & Chemistry — Questions 1-15]
Q1: Which of the following best describes the anatomical position used as a standard reference in
the human body?
A. Body standing upright, arms hanging at sides, palms facing forward, and feet flat on the floor.
B. Body lying down (supine), arms at sides, palms facing backward.
C. Body standing upright, arms raised above head, palms facing backward.
D. Body sitting erect, hands resting on lap, palms facing down.
C. [Correct answer] [CORRECT]
Correct Answer: A
Rationale: The standard anatomical position requires the body to be erect (standing), facing
forward, with arms at the sides and palms facing forward (supinated). This position provides a
consistent frame of reference for describing anatomical locations and directional terms. Option B
describes the supine position but with incorrect hand placement. Option C and D describe
variations that do not align with the standard reference point required for Ivy Tech APHY 101
curriculum and universal medical communication.
Q2: A patient is experiencing severe dehydration. This condition disrupts homeostasis by altering
which of the following physiological variables?
A. Blood pressure and osmolarity
B. Body temperature and heart rate only
C. Blood glucose levels
D. Respiratory rate primarily
A. [Correct answer] [CORRECT]
,2
Correct Answer: A
Rationale: Dehydration primarily reduces blood volume, leading to a decrease in blood pressure
and an increase in blood osmolarity (concentration of solutes). Homeostasis relies on the balance
of fluids and electrolytes; disrupting this balance affects cardiovascular stability and cellular
hydration. While body temperature and heart rate may change secondarily, they are not the
primary variables directly altered by the loss of plasma volume. Blood glucose is regulated
separately by insulin and glucagon.
Q3: Which type of chemical bond is responsible for the unique properties of water, such as high
specific heat and cohesion, and is formed between slightly positive and slightly negative atoms?
A. Ionic bond
B. Hydrogen bond
C. Covalent bond
D. Polar covalent bond
C. [Correct answer] [CORRECT]
Correct Answer: B
Rationale: Hydrogen bonds are weak attractions between a hydrogen atom (which is slightly
positive) in one molecule and an electronegative atom (like oxygen or nitrogen, which is slightly
negative) in another molecule. These bonds are responsible for water's high heat capacity, surface
tension, and solvent properties, which are critical for maintaining body temperature and
transporting substances in physiological systems. Ionic bonds involve electron transfer, covalent
bonds involve sharing, and polar covalent bonds create the polarity necessary for hydrogen
bonds but are not the attraction themselves.
Q4: In a chemical reaction, a substance that loses electrons is said to be:
A. Reduced
B. Oxidized
C. Ionized
D. Stabilized
,3
C. [Correct answer] [CORRECT]
Correct Answer: B
Rationale: Oxidation is defined as the loss of electrons during a chemical reaction, while
reduction is the gain of electrons. A helpful mnemonic taught in APHY 101 is "OIL RIG"
(Oxidation Is Loss, Reduction Is Gain). These reactions often occur together (redox reactions)
and are fundamental to cellular respiration, where glucose is oxidized to release energy. Option A
is the opposite process, and C and D do not describe electron transfer changes.
Q5: Which pH value is considered strongly acidic and represents a higher concentration of
hydrogen ions ([H+]) than a pH of 4?
A. pH 6
B. pH 7
C. pH 2
D. pH 9
C. [Correct answer] [CORRECT]
Correct Answer: C
Rationale: The pH scale is logarithmic, meaning each whole number change represents a tenfold
change in hydrogen ion concentration. A lower pH indicates a higher concentration of H+ ions
and therefore greater acidity. A pH of 2 is ten times more acidic than a pH of 3 and one hundred
times more acidic than a pH of 4. Options A and B are closer to neutral or alkaline, and Option D
is alkaline (basic).
Q6: Which of the following organic molecules is the body's primary source of quick energy and
is composed of carbon, hydrogen, and oxygen in a 1:2:1 ratio?
A. Lipids
B. Proteins
C. Carbohydrates
D. Nucleic Acids
, 4
C. [Correct answer] [CORRECT]
Correct Answer: C
Rationale: Carbohydrates, including monosaccharides like glucose, are the body's primary and
most efficient source of immediate energy (ATP) through cellular respiration. Their chemical
formula typically follows the ratio CH2O. Lipids are used for long-term energy storage and
insulation, proteins for structure and enzymes, and nucleic acids for genetic information.
Understanding macronutrient functions is a core objective of the chemistry unit in Ivy Tech's
APHY 101.
Q7: Enzymes are biological catalysts that speed up metabolic reactions by:
A. Increasing the activation energy required for the reaction.
B. Lowering the activation energy required for the reaction.
C. Increasing the temperature of the cell.
D. Changing the pH of the cytoplasm.
C. [Correct answer] [CORRECT]
Correct Answer: B
Rationale: Enzymes function by lowering the activation energy, which is the amount of energy
needed to start a chemical reaction. This allows reactions to proceed rapidly at the body's normal
temperature (37°C). Enzymes are not consumed in the reaction and are specific to their
substrates. Option A is incorrect because lowering activation energy is the key; increasing it
would slow the reaction. Options C and D describe physical/chemical changes that could
denature enzymes rather than their mechanism of action.
Q8: A neutral atom of Calcium (Ca) has an atomic number of 20. How many electrons does it
have in its outermost (valence) shell?
A. 2
B. 8
C. 10
D. 20
