BIOS 252 STUDY GUIDE 2026 MASTER SOLUTION DIGEST

BIOS 252 STUDY GUIDE 2026 MASTER
SOLUTION DIGEST


◉_______ cells function as immune/phagocytic cells within the
central nervous system


A. Ependymal
B. Astrocytes
C. Microglial
D. Schwann
E. Oligodendrogital. Answer: C. Microglial


◉The myelin sheaths that surround the axons of some of the
neurons in the centra nervous system are formed by


A. Astrocytes
B. Oligodendrocytes
C. Microglia
D. Ependymal cells
E. Schwann cells. Answer: B. Oligodendrocytes

, ◉A muscle that provides the major force of producing a specific
movement is called


A. An antagonist
B. An agonist
C. A synergist
D. A fixation
E. A sidekick. Answer: B. An agonist


◉During inhalation, ________ muscles contract to elevate the ribs.
During forced exhalation, _______ muscles contract to depress the ribs


A. External intercostals ; internal intercostals
B. Transverse abdominis ; diaphragm
C. Diaphragm ; transverse abdominis
D. Internal intercostals ; external intercostals
E. Rectus abdominis ; external obliques. Answer: A. External
intercostals ; internal intercostals


◉Which of the following are functions of various neuroglial cells


A. Forming myelin sheaths on axons