WSU Bio 251 Old Exam 1 Complete Exam Review | Verified & Updated 2025–2026

WSU BIO 251 OLD EXAM 1 COMPLETE EXAM REVIEW |
VERIFIED & UPDATED 2025–2026
Which of the following accurately represents the levels of organization for the human body,
from least to most complex?

A. organ systems, cells, tissues, organs

B. tissues, cells, organs, organ systems

C. cells, tissues, organs, organ systems

D. cells, tissues, organ systems, organs

E. organ systems, organs, cells, tissues - correct answer -C



What are the two major extracellular fluid (ECF) compartments of the body?

A. intracellular fluid and interstitial fluid

B. intracellular fluid and plasma

C. intracellular fluid and intra-ocular (eye) fluid

D. interstitial fluid and plasma

E. intracellular fluid and joint fluid - correct answer -D



Which type of chemical messenger is released from one cell and communicates with nearby
neighboring cells?

A. autocrine

B. paracrine

C. endocrine

D. neurohormone

E. none of the above - correct answer -B

, Actin is found in what type of cytoskeleton filament?

A. microfilament

B. intermediate filament

C. microtubule

D. trabecular filament

E. none of the above - correct answer -A



The body fluid compartment with a high sodium (Na+) concentration is ______________.

A. nuclear fluid

B. intracellular fluid (ICF)

C. extracellular fluid (ECF)

D. intracellular and extracellular fluid are equal in sodium concentration

E. all of the above - correct answer -C



Which of the following compartments contains most of the water found in humans?

A. plasma

B. extracellular fluid

C. intracellular fluid (cytosol)

D. lumen of intestines

E. interstitial fluid - correct answer -C



Which of the following is NOT a primary tissue in the body?

A. epithelial

B. muscle

C. connective