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BIOD 151 Essential Human Anatomy & Physiology I Final
Exam Version 1 | 2026 Update | Graded A+
1 Which of the following represents the correct hierarchical organization of structural levels in
the human body, from simplest to most complex?
A. Organ, Tissue, Cellular, Chemical, Organ System, Organismal
B. Chemical, Cellular, Tissue, Organ, Organ System, Organismal
C. Cellular, Chemical, Tissue, Organ, Organ System, Organismal
D. Chemical, Tissue, Cellular, Organ, Organ System, Organismal
Correct Answer: B
Explanation: The structural levels of organization, from simplest to most complex, are:
chemical level (atoms and molecules), cellular level (cells), tissue level (groups of similar cells),
organ level (two or more tissue types working together), organ system level (organs working
together), and organismal level (the entire living individual).
2 Which organ system is primarily responsible for regulating fluid and electrolyte balance, as
well as removing metabolic waste from the blood?
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A. Respiratory system
B. Digestive system
C. Urinary system
D. Endocrine system
Correct Answer: C
Explanation: The urinary system (kidneys, ureters, bladder, urethra) regulates fluid and
electrolyte balance, filters blood, and eliminates metabolic waste as urine. The respiratory
system removes carbon dioxide. The digestive system processes nutrients. The endocrine system
regulates body functions through hormones.
3 The body's ability to maintain a relatively stable internal environment despite changing
external conditions is known as:
A. Metabolism
B. Homeostasis
C. Responsiveness
D. Reproduction
Correct Answer: B
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Explanation: Homeostasis is the ability of the body to maintain a relatively stable internal
environment. Metabolism refers to all chemical reactions in the body. Responsiveness is the
ability to detect and respond to stimuli. Reproduction is the formation of new cells or organisms.
4 Which of the following is an example of a negative feedback mechanism?
A. Blood clotting following an injury
B. Uterine contractions during childbirth
C. Regulation of blood glucose levels by insulin
D. The release of oxytocin during labor
Correct Answer: C
Explanation: Negative feedback mechanisms reverse a change in a controlled condition
(e.g., high blood glucose triggers insulin release to lower glucose levels). Positive feedback
mechanisms amplify the change (e.g., blood clotting, uterine contractions, and oxytocin release
during labor).
5 In the anatomical position, the palms of the hands face:
A. Posteriorly
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B. Anteriorly
C. Medially
D. Laterally
Correct Answer: B
Explanation: In the anatomical position, the body is standing erect, feet together, arms at
the sides, and palms facing anteriorly (forward). The thumbs are pointed away from the body.
6 The term "proximal" means:
A. Farther from the point of attachment to the trunk
B. Closer to the point of attachment to the trunk
C. Toward the midline of the body
D. Away from the midline of the body
Correct Answer: B
Explanation: Proximal means closer to the point of attachment to the trunk (e.g., the elbow
is proximal to the wrist). Distal means farther from the point of attachment. Medial is toward
the midline, and lateral is away from the midline.
BIOD 151 Essential Human Anatomy & Physiology I Final
Exam Version 1 | 2026 Update | Graded A+
1 Which of the following represents the correct hierarchical organization of structural levels in
the human body, from simplest to most complex?
A. Organ, Tissue, Cellular, Chemical, Organ System, Organismal
B. Chemical, Cellular, Tissue, Organ, Organ System, Organismal
C. Cellular, Chemical, Tissue, Organ, Organ System, Organismal
D. Chemical, Tissue, Cellular, Organ, Organ System, Organismal
Correct Answer: B
Explanation: The structural levels of organization, from simplest to most complex, are:
chemical level (atoms and molecules), cellular level (cells), tissue level (groups of similar cells),
organ level (two or more tissue types working together), organ system level (organs working
together), and organismal level (the entire living individual).
2 Which organ system is primarily responsible for regulating fluid and electrolyte balance, as
well as removing metabolic waste from the blood?
,2
A. Respiratory system
B. Digestive system
C. Urinary system
D. Endocrine system
Correct Answer: C
Explanation: The urinary system (kidneys, ureters, bladder, urethra) regulates fluid and
electrolyte balance, filters blood, and eliminates metabolic waste as urine. The respiratory
system removes carbon dioxide. The digestive system processes nutrients. The endocrine system
regulates body functions through hormones.
3 The body's ability to maintain a relatively stable internal environment despite changing
external conditions is known as:
A. Metabolism
B. Homeostasis
C. Responsiveness
D. Reproduction
Correct Answer: B
,3
Explanation: Homeostasis is the ability of the body to maintain a relatively stable internal
environment. Metabolism refers to all chemical reactions in the body. Responsiveness is the
ability to detect and respond to stimuli. Reproduction is the formation of new cells or organisms.
4 Which of the following is an example of a negative feedback mechanism?
A. Blood clotting following an injury
B. Uterine contractions during childbirth
C. Regulation of blood glucose levels by insulin
D. The release of oxytocin during labor
Correct Answer: C
Explanation: Negative feedback mechanisms reverse a change in a controlled condition
(e.g., high blood glucose triggers insulin release to lower glucose levels). Positive feedback
mechanisms amplify the change (e.g., blood clotting, uterine contractions, and oxytocin release
during labor).
5 In the anatomical position, the palms of the hands face:
A. Posteriorly
, 4
B. Anteriorly
C. Medially
D. Laterally
Correct Answer: B
Explanation: In the anatomical position, the body is standing erect, feet together, arms at
the sides, and palms facing anteriorly (forward). The thumbs are pointed away from the body.
6 The term "proximal" means:
A. Farther from the point of attachment to the trunk
B. Closer to the point of attachment to the trunk
C. Toward the midline of the body
D. Away from the midline of the body
Correct Answer: B
Explanation: Proximal means closer to the point of attachment to the trunk (e.g., the elbow
is proximal to the wrist). Distal means farther from the point of attachment. Medial is toward
the midline, and lateral is away from the midline.
