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BIOS 252 COMPREHENSIVE EXAM
QUESTIONS WITH CORRECT ANSWERS
2026\2027 UPDATE
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 CORRECT 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 CORRECT ANSWER: A.
External intercostals ; internal intercostals
Which of the following are functions of various neuroglial cells
A. Forming myelin sheaths on axons
B. Secreting cerebrospinal fluid
C. Transmitting electrical impulses to the spinal cord
D. Storing episodic memories
E. Acting as phagocytes CORRECT ANSWER: A. Forming myelin sheaths on
axons, B. Secreting cerebrospinal fluid, E. Acting as phagocytes
During active muscle contraction, the myosin heads will bind to which
protein?
, 2
A. Dystrophin
B. Actin
C. Titan
D. Troponin
E. Tropomyosin CORRECT ANSWER: B. Actin
Which of the following glial cells are NOT found in the Central Nervous
System?
A. Astrocytes
B. Schwann cells
C. Oligodendrocytes
D. Ependymal cells
E. Microglial cells CORRECT ANSWER: B. Schwann cells
Which of the following would increase the conduction velocity of an action
potential?
A. Myelin sheath covering the axon
B. Colder temperatures
C. Longer axon length
D. Increased intensity of the action potential
E. Higher (less negative) resting membrane potential CORRECT
ANSWER: A. Myelin sheath covering the axon
Which of the following is described as the most important function of the
Reticular Activating System (RAS)?
A. Coordination of fine motor movement and balance
B. Maintenance of consciousness
C. Visual processing
D. Formation of speech motor patterns
E. Linking psychological states to psychological states CORRECT
ANSWER: B. Maintenance of consciousness
The term posterior means
A. Nearer to or at the front of the body
B. Nearer to or at the back of the body
C. Further from the attachment of a limb
D. Nearer front he attachment of the limb
BIOS 252 COMPREHENSIVE EXAM
QUESTIONS WITH CORRECT ANSWERS
2026\2027 UPDATE
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 CORRECT 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 CORRECT ANSWER: A.
External intercostals ; internal intercostals
Which of the following are functions of various neuroglial cells
A. Forming myelin sheaths on axons
B. Secreting cerebrospinal fluid
C. Transmitting electrical impulses to the spinal cord
D. Storing episodic memories
E. Acting as phagocytes CORRECT ANSWER: A. Forming myelin sheaths on
axons, B. Secreting cerebrospinal fluid, E. Acting as phagocytes
During active muscle contraction, the myosin heads will bind to which
protein?
, 2
A. Dystrophin
B. Actin
C. Titan
D. Troponin
E. Tropomyosin CORRECT ANSWER: B. Actin
Which of the following glial cells are NOT found in the Central Nervous
System?
A. Astrocytes
B. Schwann cells
C. Oligodendrocytes
D. Ependymal cells
E. Microglial cells CORRECT ANSWER: B. Schwann cells
Which of the following would increase the conduction velocity of an action
potential?
A. Myelin sheath covering the axon
B. Colder temperatures
C. Longer axon length
D. Increased intensity of the action potential
E. Higher (less negative) resting membrane potential CORRECT
ANSWER: A. Myelin sheath covering the axon
Which of the following is described as the most important function of the
Reticular Activating System (RAS)?
A. Coordination of fine motor movement and balance
B. Maintenance of consciousness
C. Visual processing
D. Formation of speech motor patterns
E. Linking psychological states to psychological states CORRECT
ANSWER: B. Maintenance of consciousness
The term posterior means
A. Nearer to or at the front of the body
B. Nearer to or at the back of the body
C. Further from the attachment of a limb
D. Nearer front he attachment of the limb
