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, NU 110 TEST 1 REVIEW | 2026 KEY CONCEPTS AND QUESTIONS | WITH
COMPLETE SOLUTIONS - GALEN.
SECTION 1: FOUNDATIONS & CHEMISTRY (Questions 1-20)
Question 1
What is the correct order of structural organization in the human body from simplest to most complex?
A) Tissue → Cell → Organ → System → Organism
B) Cell → Tissue → Organ → System → Organism
C) Organ → Tissue → Cell → System → Organism
D) Cell → Organ → Tissue → System → Organism
ANSWER: B – Cell → Tissue → Organ → System → Organism
Rationale:
• Option B is correct because the levels of structural organization progress from simplest to most
complex: Atoms → Molecules → Cells → Tissues → Organs → Systems → Organism.
• Option A is incorrect because cells come before tissues.
• Option C is incorrect because cells are the simplest level.
• Option D is incorrect because tissues come before organs.
Question 2
Which of the following represents the smallest level of structural organization?
A) Organ system
B) Tissue
C) Cell
D) Atom
ANSWER: D – Atom
Rationale:
• Option D is correct because atoms are the smallest level of structural organization. Atoms
combine to form molecules, which form cells—the smallest living units.
• Option C (cell) is the smallest living unit but not the smallest structural level.
, NU 110 TEST 1 REVIEW | 2026 KEY CONCEPTS AND QUESTIONS | WITH
COMPLETE SOLUTIONS - GALEN.
SECTION 1: FOUNDATIONS & CHEMISTRY (Questions 1-20)
Question 1
What is the correct order of structural organization in the human body from simplest to most complex?
A) Tissue → Cell → Organ → System → Organism
B) Cell → Tissue → Organ → System → Organism
C) Organ → Tissue → Cell → System → Organism
D) Cell → Organ → Tissue → System → Organism
ANSWER: B – Cell → Tissue → Organ → System → Organism
Rationale:
• Option B is correct because the levels of structural organization progress from simplest to most
complex: Atoms → Molecules → Cells → Tissues → Organs → Systems → Organism.
• Option A is incorrect because cells come before tissues.
• Option C is incorrect because cells are the simplest level.
• Option D is incorrect because tissues come before organs.
Question 2
Which of the following represents the smallest level of structural organization?
A) Organ system
B) Tissue
C) Cell
D) Atom
ANSWER: D – Atom
Rationale:
• Option D is correct because atoms are the smallest level of structural organization. Atoms
combine to form molecules, which form cells—the smallest living units.
• Option C (cell) is the smallest living unit but not the smallest structural level.
