BIO 201 Human Anatomy & Physiology
Final Exam – NAU Final Exam 2026:
Complete Exam Prep with Questions,
Answers & Detailed Explanations
Rapid diffusion of oxygen and carbon dioxide through the air sacs
(alveoli) of the lung takes place through ____________ epithelium.
A. simple squamous
B. simple cuboidal
C. simple columnar
D. keratinized stratified squamous
E. nonkeratinized stratifed squamous - ✔✔ANSWER ✔✔-A. simple
squamous
,Which of the following lists levels of human structure from the most
complex to the simplest?
A. Organelle, cell, tissue, organ, organ system
B. Organ system, organ, cell, tissue, organelle
C. Organ system, organelle, tissue, cell, organ
D. Organ system, organ, tissue, cell, organelle
E. Organ, organ system, tissue, cell, organelle - ✔✔ANSWER ✔✔-D.
Organ system, organ, tissue, cell, organelle
Metabolism is the sum of _________ and _________.
A. inhalation; exhalation
B. growth; differentiation
C. anabolism; catabolism
D. respiration; expiration - ✔✔ANSWER ✔✔-C. anabolism; catabolism
We live in an ever-changing environment outside of our body, yet our
internal conditions remain relatively stable. This is called_________.
A. Homeostasis
B. Metastasis
,C. Responsiveness
D. Adaptation
E.Evolution - ✔✔ANSWER ✔✔-A. Homeostasis
An educated speculation or a possible answer to a question that can be
tested is called a(n) _______.
A. Scientific Method
B. Theory
C. Law
D. Hypothesis
E. Fact - ✔✔ANSWER ✔✔-D. Hypothesis
Which of these has the highest H+ concentration?
A. stomach secretions, pH = 2.3
B. red wine, pH = 3.2
C. saliva, pH = 6.6
D. household ammonia, pH = 10.8 - ✔✔ANSWER ✔✔-A. stomach
secretions, pH = 2.3
Which of the following molecules is a buffer in your extracellular fluid?
, A. Cl-
B. HCO3-
C. Na+
D. K+ - ✔✔ANSWER ✔✔-B. HCO3-
What does the term hypernatremia mean?
A. low potassium concentration
B. high potassium concentration
C. low sodium concentration
D. high sodium concentration - ✔✔ANSWER ✔✔-D. high sodium
concentration
Which of the following is an example of positive feedback control?
A. a decrease in blood pressure after a decrease in heart rate
B. an increase in fluid excretion after drinking Coca Cola
C. an increase in uterine contractions from oxytocin secretion in labor
D. an increase in shivering after exposure to cold temperatures -
✔✔ANSWER ✔✔-C. an increase in uterine contractions from oxytocin
secretion in labor
Final Exam – NAU Final Exam 2026:
Complete Exam Prep with Questions,
Answers & Detailed Explanations
Rapid diffusion of oxygen and carbon dioxide through the air sacs
(alveoli) of the lung takes place through ____________ epithelium.
A. simple squamous
B. simple cuboidal
C. simple columnar
D. keratinized stratified squamous
E. nonkeratinized stratifed squamous - ✔✔ANSWER ✔✔-A. simple
squamous
,Which of the following lists levels of human structure from the most
complex to the simplest?
A. Organelle, cell, tissue, organ, organ system
B. Organ system, organ, cell, tissue, organelle
C. Organ system, organelle, tissue, cell, organ
D. Organ system, organ, tissue, cell, organelle
E. Organ, organ system, tissue, cell, organelle - ✔✔ANSWER ✔✔-D.
Organ system, organ, tissue, cell, organelle
Metabolism is the sum of _________ and _________.
A. inhalation; exhalation
B. growth; differentiation
C. anabolism; catabolism
D. respiration; expiration - ✔✔ANSWER ✔✔-C. anabolism; catabolism
We live in an ever-changing environment outside of our body, yet our
internal conditions remain relatively stable. This is called_________.
A. Homeostasis
B. Metastasis
,C. Responsiveness
D. Adaptation
E.Evolution - ✔✔ANSWER ✔✔-A. Homeostasis
An educated speculation or a possible answer to a question that can be
tested is called a(n) _______.
A. Scientific Method
B. Theory
C. Law
D. Hypothesis
E. Fact - ✔✔ANSWER ✔✔-D. Hypothesis
Which of these has the highest H+ concentration?
A. stomach secretions, pH = 2.3
B. red wine, pH = 3.2
C. saliva, pH = 6.6
D. household ammonia, pH = 10.8 - ✔✔ANSWER ✔✔-A. stomach
secretions, pH = 2.3
Which of the following molecules is a buffer in your extracellular fluid?
, A. Cl-
B. HCO3-
C. Na+
D. K+ - ✔✔ANSWER ✔✔-B. HCO3-
What does the term hypernatremia mean?
A. low potassium concentration
B. high potassium concentration
C. low sodium concentration
D. high sodium concentration - ✔✔ANSWER ✔✔-D. high sodium
concentration
Which of the following is an example of positive feedback control?
A. a decrease in blood pressure after a decrease in heart rate
B. an increase in fluid excretion after drinking Coca Cola
C. an increase in uterine contractions from oxytocin secretion in labor
D. an increase in shivering after exposure to cold temperatures -
✔✔ANSWER ✔✔-C. an increase in uterine contractions from oxytocin
secretion in labor
