WGU D755 OA Study Prep

WGU C458 Health, Fitness and Wellness


UNIT 1: PHYSICAL HEALTH — Module 1: Body Systems (Questions 1-
25)
1. The adult human skeleton usually consists of _____ bones.
A) 206
B) 208
C) 204
D) 210
Answer: A) 206
Rationale: The adult human skeleton typically contains 206 bones. The
axial skeleton (80 bones) includes the skull, vertebral column, and rib
cage; the appendicular skeleton (126 bones) includes the limbs and
girdles .
2. Which is NOT one of the four classifications of bones?
A) Long bones
B) Medium bones
C) Short bones
D) Irregular bones
Answer: B) Medium bones
Rationale: The four classifications of bones are long, short, flat, and
irregular. "Medium bones" is not a recognized classification in anatomy .

,3. The point where two or more bones meet is called a(n):
A) Ligament
B) Tendon
C) Joint
D) Cartilage
Answer: C) Joint
Rationale: A joint (or articulation) is the location where two or more
bones come together. Joints can be classified by their structure (fibrous,
cartilaginous, synovial) and function (immovable, slightly movable,
freely movable) .
4. The three categories of joints based on range of motion are:
A) Fibrous, cartilaginous, synovial
B) Immovable, slightly movable, freely movable
C) Hinge, ball-and-socket, pivot
D) Suture, symphysis, condyloid
Answer: B) Immovable, slightly movable, freely movable
Rationale: Based on their range of motion, joints are classified as
immovable (synarthrosis), slightly movable (amphiarthrosis), and freely
movable (diarthrosis) .
5. Which type of tissue covers the ends of bones in freely movable
joints?
A) Ligament
B) Tendon
C) Synovial membrane
D) Cartilage
Answer: D) Cartilage
Rationale: Cartilage is a tough but flexible tissue that covers the ends of

,bones in freely movable joints, protecting bones by preventing them
from rubbing directly against each other .
6. Where is smooth muscle primarily located?
A) Heart
B) Bones
C) Walls of internal organs
D) Tendons
Answer: C) Walls of internal organs
Rationale: Smooth muscle (visceral muscle) lines the walls of internal
organs such as the intestines, blood vessels, and bladder. It is
involuntary and non-striated .
7. Which muscle type is found only in the heart?
A) Striated muscle
B) Smooth muscle
C) Cardiac muscle
D) Skeletal muscle
Answer: C) Cardiac muscle
Rationale: Cardiac muscle is a unique type of muscle found exclusively
in the heart. It combines characteristics of both striated and smooth
muscle and contracts involuntarily .
8. The two major divisions of the nervous system are the:
A) Somatic and autonomic
B) Central and peripheral
C) Sympathetic and parasympathetic
D) Motor and sensory
Answer: B) Central and peripheral
Rationale: The nervous system is divided into the central nervous

, system (CNS: brain and spinal cord) and the peripheral nervous system
(PNS: all nerves outside the CNS) .
9. Which part of the nervous system includes only the brain and spinal
cord?
A) Peripheral Nervous System (PNS)
B) Autonomic Nervous System (ANS)
C) Central Nervous System (CNS)
D) Somatic Nervous System (SNS)
Answer: C) Central Nervous System (CNS)
Rationale: The Central Nervous System (CNS) consists solely of the brain
and spinal cord, which integrate and coordinate sensory information
and motor commands .
10. The Peripheral Nervous System (PNS) functions to:
A) Control only voluntary movements
B) Relay messages between the CNS and other body areas
C) Regulate heart rate without external input
D) Control only the brain's internal functions
Answer: B) Relay messages between the CNS and other body areas
Rationale: The Peripheral Nervous System (PNS) consists of all nerves
outside the brain and spinal cord. It relays messages between the CNS
and other areas of the body .
11. Which structure is part of the upper respiratory tract?
A) Trachea
B) Primary bronchi
C) Pharynx
D) Lungs
Answer: C) Pharynx