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NCCAOM BIOMEDICINE BOARD
EXAM PRACTICE QUESTIONS WITH
VERIFIED ANSWERS & COMPLETE
RATIONALES
## SECTION 1: WESTERN ANATOMY & PHYSIOLOGY
**1. A patient presents with chest pain radiating to the left arm,
shortness of breath, and diaphoresis. Which structure is most
likely involved in the pain pathway?**
A. Vagus nerve
B. Phrenic nerve
C. Sympathetic chain ganglia
D. Intercostal nerves
**Correct answer:** C. Sympathetic chain ganglia
**Rationale:** Cardiac pain (angina/MI) is transmitted via
visceral afferent fibers that travel with sympathetic nerves. Pain
from the heart is referred to the left arm and jaw because these
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visceral afferents enter the same spinal cord segments (T1-T4)
as somatic afferents from those areas.
---
**2. A patient reports dizziness and lightheadedness when
standing up quickly. This is most likely due to dysfunction of
which system?**
A. Vestibular system
B. Autonomic nervous system
C. Cerebellum
D. Somatosensory system
**Correct answer:** B. Autonomic nervous system
**Rationale:** Orthostatic hypotension, characterized by
dizziness upon standing, results from a failure of the autonomic
nervous system to appropriately constrict blood vessels and
increase heart rate in response to gravity-induced blood pooling
in the lower extremities.
---
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**3. A patient with a history of smoking presents with a non-
healing ulcer on the lower lip. Which layer of the skin is most
directly involved in this condition?**
A. Stratum corneum
B. Epidermis
C. Dermis
D. Subcutaneous tissue
**Correct answer:** C. Dermis
**Rationale:** Squamous cell carcinoma, which often presents
as a non-healing ulcer on sun-exposed areas, arises from
keratinocytes in the epidermis but invades the dermis as it
progresses. The epidermis is the outermost layer, but the
dermis is involved in ulceration.
---
**4. A 29-year-old patient complains of hypochondriac pain and
fullness for several months. Which organ system is most
directly implicated?**
A. Cardiovascular
B. Respiratory
C. Hepatobiliary
NCCAOM BIOMEDICINE BOARD
EXAM PRACTICE QUESTIONS WITH
VERIFIED ANSWERS & COMPLETE
RATIONALES
## SECTION 1: WESTERN ANATOMY & PHYSIOLOGY
**1. A patient presents with chest pain radiating to the left arm,
shortness of breath, and diaphoresis. Which structure is most
likely involved in the pain pathway?**
A. Vagus nerve
B. Phrenic nerve
C. Sympathetic chain ganglia
D. Intercostal nerves
**Correct answer:** C. Sympathetic chain ganglia
**Rationale:** Cardiac pain (angina/MI) is transmitted via
visceral afferent fibers that travel with sympathetic nerves. Pain
from the heart is referred to the left arm and jaw because these
,2 | Page
visceral afferents enter the same spinal cord segments (T1-T4)
as somatic afferents from those areas.
---
**2. A patient reports dizziness and lightheadedness when
standing up quickly. This is most likely due to dysfunction of
which system?**
A. Vestibular system
B. Autonomic nervous system
C. Cerebellum
D. Somatosensory system
**Correct answer:** B. Autonomic nervous system
**Rationale:** Orthostatic hypotension, characterized by
dizziness upon standing, results from a failure of the autonomic
nervous system to appropriately constrict blood vessels and
increase heart rate in response to gravity-induced blood pooling
in the lower extremities.
---
, 3 | Page
**3. A patient with a history of smoking presents with a non-
healing ulcer on the lower lip. Which layer of the skin is most
directly involved in this condition?**
A. Stratum corneum
B. Epidermis
C. Dermis
D. Subcutaneous tissue
**Correct answer:** C. Dermis
**Rationale:** Squamous cell carcinoma, which often presents
as a non-healing ulcer on sun-exposed areas, arises from
keratinocytes in the epidermis but invades the dermis as it
progresses. The epidermis is the outermost layer, but the
dermis is involved in ulceration.
---
**4. A 29-year-old patient complains of hypochondriac pain and
fullness for several months. Which organ system is most
directly implicated?**
A. Cardiovascular
B. Respiratory
C. Hepatobiliary
