BIOL 251: Human Anatomy & Physiology I w/Lab 2026 - 2027
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Module 4: Articulations
Complete Exam Review Questions with Verified Answers |
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Question 1
Which type of joint allows no movement?
A) Synovial
B) Cartilaginous
C) Fibrous
D) Diarthrosis
Correct Answer: C) Fibrous
Explanation: Fibrous joints are immovable (synarthroses). Examples
include sutures of the skull, which are held together by dense
connective tissue with no joint cavity. Synovial joints are freely
movable (diarthroses), and cartilaginous joints are slightly movable
(amphiarthroses). Fibrous joints provide stability and protection,
particularly in the skull where movement would be detrimental.
,Question 2
A joint that is slightly movable is called:
A) Diarthrosis
B) Amphiarthrosis
C) Synarthrosis
D) Synovial
Correct Answer: B) Amphiarthrosis
Explanation: Amphiarthrosis refers to a slightly movable joint.
Examples include intervertebral discs and the pubic symphysis.
Synarthrosis joints are immovable, while diarthrosis joints are
freely movable. Amphiarthroses provide limited movement
combined with strength and stability, making them ideal for
structures like the vertebral column that need some flexibility but
also support.
Question 3
What type of joint is the shoulder (glenohumeral joint)?
A) Hinge
B) Ball-and-socket
C) Pivot
D) Saddle
Correct Answer: B) Ball-and-socket
,Explanation: The shoulder is a ball-and-socket joint, allowing
movement in multiple planes. The head of the humerus (ball) fits into
the glenoid cavity of the scapula (socket). This joint type provides
the greatest range of motion, including flexion, extension, abduction,
adduction, rotation, and circumduction. The hip is also a ball-and-
socket joint but is more stable than the shoulder due to its deeper
socket.
Question 4
Which movement decreases the angle between two bones?
A) Extension
B) Flexion
C) Abduction
D) Adduction
Correct Answer: B) Flexion
Explanation: Flexion is the movement that decreases the angle
between two bones at a joint. For example, bending the elbow brings
the forearm closer to the upper arm. Extension increases the angle,
abduction moves away from the midline, and adduction moves
toward the midline. Flexion typically occurs in the sagittal plane and
is commonly seen in hinge joints like the elbow and knee.
, Question 5
Pointing the toes upward is called:
A) Plantarflexion
B) Dorsiflexion
C) Pronation
D) Supination
Correct Answer: B) Dorsiflexion
Explanation: Dorsiflexion is the movement that points the toes
upward (toward the shin). This movement decreases the angle
between the dorsum of the foot and the leg. Plantarflexion points the
toes downward (away from the shin). Dorsiflexion occurs at the
ankle joint and is important for walking, running, and maintaining
balance when moving forward.
Question 6
Moving a limb away from the midline is:
A) Adduction
B) Abduction
C) Circumduction
D) Rotation
Correct Answer: B) Abduction
Portage learning
Module 4: Articulations
Complete Exam Review Questions with Verified Answers |
LockDown Browser (GUARANTEED PASS)
Question 1
Which type of joint allows no movement?
A) Synovial
B) Cartilaginous
C) Fibrous
D) Diarthrosis
Correct Answer: C) Fibrous
Explanation: Fibrous joints are immovable (synarthroses). Examples
include sutures of the skull, which are held together by dense
connective tissue with no joint cavity. Synovial joints are freely
movable (diarthroses), and cartilaginous joints are slightly movable
(amphiarthroses). Fibrous joints provide stability and protection,
particularly in the skull where movement would be detrimental.
,Question 2
A joint that is slightly movable is called:
A) Diarthrosis
B) Amphiarthrosis
C) Synarthrosis
D) Synovial
Correct Answer: B) Amphiarthrosis
Explanation: Amphiarthrosis refers to a slightly movable joint.
Examples include intervertebral discs and the pubic symphysis.
Synarthrosis joints are immovable, while diarthrosis joints are
freely movable. Amphiarthroses provide limited movement
combined with strength and stability, making them ideal for
structures like the vertebral column that need some flexibility but
also support.
Question 3
What type of joint is the shoulder (glenohumeral joint)?
A) Hinge
B) Ball-and-socket
C) Pivot
D) Saddle
Correct Answer: B) Ball-and-socket
,Explanation: The shoulder is a ball-and-socket joint, allowing
movement in multiple planes. The head of the humerus (ball) fits into
the glenoid cavity of the scapula (socket). This joint type provides
the greatest range of motion, including flexion, extension, abduction,
adduction, rotation, and circumduction. The hip is also a ball-and-
socket joint but is more stable than the shoulder due to its deeper
socket.
Question 4
Which movement decreases the angle between two bones?
A) Extension
B) Flexion
C) Abduction
D) Adduction
Correct Answer: B) Flexion
Explanation: Flexion is the movement that decreases the angle
between two bones at a joint. For example, bending the elbow brings
the forearm closer to the upper arm. Extension increases the angle,
abduction moves away from the midline, and adduction moves
toward the midline. Flexion typically occurs in the sagittal plane and
is commonly seen in hinge joints like the elbow and knee.
, Question 5
Pointing the toes upward is called:
A) Plantarflexion
B) Dorsiflexion
C) Pronation
D) Supination
Correct Answer: B) Dorsiflexion
Explanation: Dorsiflexion is the movement that points the toes
upward (toward the shin). This movement decreases the angle
between the dorsum of the foot and the leg. Plantarflexion points the
toes downward (away from the shin). Dorsiflexion occurs at the
ankle joint and is important for walking, running, and maintaining
balance when moving forward.
Question 6
Moving a limb away from the midline is:
A) Adduction
B) Abduction
C) Circumduction
D) Rotation
Correct Answer: B) Abduction
