[STUDY GUIDE] • HIGH-YIELD PRACTICE & REVIEW EDITION
BIOS 255 Anatomy & Physiology III (A&P III
Review) Exam Questions & Answers,
Updated 2026/2027 Edition
Comprehensive Examination Question Bank • In-Depth Rationales • Concept Mapping
TOTAL QUESTIONS EXAM TOPICS RATIONALES
100 Questions 11 Modules 100% Verified
DOCUMENT OVERVIEW
This document contains 100 verified questions with correct answers and detailed rationales focusing on
human anatomy and physiology. It is suitable for exam preparation, course review, and certification
preparation, providing students with a comprehensive understanding of complex biological concepts and
physiological mechanisms.
EXAM BLUEPRINT & TOPIC DISTRIBUTION
Systematic breakdown of subject domains and exam coverage.
Topic Module Scope & Core Focus Questions Share (%)
This topic covers hormonal imbalances and related disorders
Endocrine System Disorders affecting metabolic functions. 10 Qs 10.0%
This topic addresses various cardiovascular diseases,
Cardiovascular Conditions including ischemic heart conditions and their presentations. 9 Qs 9.0%
Pulmonary Function and This topic explores respiratory diseases, pulmonary function
Disorders tests, and their clinical implications. 9 Qs 9.0%
Lymphatic and Immune This topic focuses on the lymphatic system, immune
Responses responses, and related disorders. 9 Qs 9.0%
This topic includes disorders affecting the gastrointestinal
Gastrointestinal Disorders system and their physiological impacts. 9 Qs 9.0%
This topic examines neurological disorders and their effects
Neurological Conditions on bodily functions. 9 Qs 9.0%
Metabolic and Nutritional This topic covers metabolic syndromes and nutritional
Disorders deficiencies related to various health conditions. 9 Qs 9.0%
Confidential • Student Study Edition • Practice & Review Guide Page 1 of 51
,STUDENT STUDY & MASTERY EDITION PRACTICE & REVIEW GUIDE
Hypertension and Vascular This topic discusses hypertension, its causes, and its effects
Health on vascular health. 9 Qs 9.0%
This topic focuses on reproductive health disorders and their
Reproductive Health Issues physiological implications. 9 Qs 9.0%
Chronic Diseases and Their This topic examines chronic diseases, their presentations,
Management and management strategies. 9 Qs 9.0%
This topic focuses on acute health conditions and their
Acute Health Conditions immediate clinical considerations. 9 Qs 9.0%
Total Exam Coverage 11 Integrated Topic Modules 100 Qs 100.0%
Confidential • Student Study Edition • Practice & Review Guide Page 2 of 51
,STUDENT STUDY & MASTERY EDITION PRACTICE & REVIEW GUIDE
TOPIC 1: ENDOCRINE SYSTEM DISORDERS
10 Questions • 10.0% of Exam • This topic covers hormonal imbalances and related disorders affecting metabolic functions.
QUESTION 1
An 32-year-old man presents with fatigue, weight gain, cold intolerance, and
constipation. Serum T4 is 0.6 ng/dL (low) and TSH is 12 mIU/L (elevated). The thyroid
gland fails to produce adequate hormone, prompting increased pituitary secretion.
Which feedback mechanism best explains the elevated TSH in this patient?
[A] Negative feedback by thyroxine on pituitary
[B] Positive feedback by TSH on thyroid
[C] Negative feedback by cortisol
[D] Positive feedback by T4 on pituitary
Correct Answer: Negative feedback by thyroxine on pituitary.
Rationale: TSH rises because low thyroid hormone fails to inhibit pituitary via negative feedback in the
hypothalamic-pituitary-thyroid axis.
QUESTION 2
A 58-year-old man reports progressive weight gain, purple striae, and easy bruising.
Serum cortisol is 48 µg/dL (normal 5-23) and ACTH is 4 pg/mL (normal 10-60). Imaging
reveals a 2-cm adrenal cortical adenoma. Which mechanism most likely accounts for
the low ACTH level?
[A] Negative feedback from excess cortisol
[B] Decreased CRH secretion
[C] Loss of POMC expression
[D] Inhibition of ACTH synthesis by adrenal tumor
Correct Answer: Negative feedback from excess cortisol.
Rationale: The tumor produces cortisol autonomously, suppressing pituitary ACTH via negative feedback.
Confidential • Student Study Edition • Practice & Review Guide Page 3 of 51
, STUDENT STUDY & MASTERY EDITION PRACTICE & REVIEW GUIDE
QUESTION 3
A 29-year-old woman presents with 6-month history of primary infertility and
amenorrhea. Her serum LH is 2 mIU/mL, FSH 6 mIU/mL, estradiol 30 pg/mL, and
transvaginal ultrasound shows no developing follicles. She has no ovarian response to
gonadotropins. Which mechanism best explains this hormonal pattern?
[A] Decreased GnRH pulse frequency leading to low LH and FSH.
[B] Increased GnRH pulse frequency causing high LH and FSH.
[C] Resistance to estradiol negative feedback at the pituitary.
[D] Excessive prolactin inhibiting GnRH secretion.
Correct Answer: Decreased GnRH pulse frequency leading to low LH and FSH.
Rationale: Low LH/FSH and estradiol indicate a reduced GnRH pulse frequency; estradiol feedback is insufficient in the
hypothalamus.
QUESTION 4
A 45-year-old man presents with progressive fatigue, unintentional weight gain, and
intolerance to cold over the last 3 months. Physical exam reveals dry skin and
bradycardia. Which hormone deficiency most likely explains these findings?
[A] T3
[B] T4
[C] ACTH
[D] GH
Correct Answer: T4.
Rationale: Low T4 causes hypothyroid symptoms such as fatigue, weight gain, and cold intolerance.
Confidential • Student Study Edition • Practice & Review Guide Page 4 of 51
BIOS 255 Anatomy & Physiology III (A&P III
Review) Exam Questions & Answers,
Updated 2026/2027 Edition
Comprehensive Examination Question Bank • In-Depth Rationales • Concept Mapping
TOTAL QUESTIONS EXAM TOPICS RATIONALES
100 Questions 11 Modules 100% Verified
DOCUMENT OVERVIEW
This document contains 100 verified questions with correct answers and detailed rationales focusing on
human anatomy and physiology. It is suitable for exam preparation, course review, and certification
preparation, providing students with a comprehensive understanding of complex biological concepts and
physiological mechanisms.
EXAM BLUEPRINT & TOPIC DISTRIBUTION
Systematic breakdown of subject domains and exam coverage.
Topic Module Scope & Core Focus Questions Share (%)
This topic covers hormonal imbalances and related disorders
Endocrine System Disorders affecting metabolic functions. 10 Qs 10.0%
This topic addresses various cardiovascular diseases,
Cardiovascular Conditions including ischemic heart conditions and their presentations. 9 Qs 9.0%
Pulmonary Function and This topic explores respiratory diseases, pulmonary function
Disorders tests, and their clinical implications. 9 Qs 9.0%
Lymphatic and Immune This topic focuses on the lymphatic system, immune
Responses responses, and related disorders. 9 Qs 9.0%
This topic includes disorders affecting the gastrointestinal
Gastrointestinal Disorders system and their physiological impacts. 9 Qs 9.0%
This topic examines neurological disorders and their effects
Neurological Conditions on bodily functions. 9 Qs 9.0%
Metabolic and Nutritional This topic covers metabolic syndromes and nutritional
Disorders deficiencies related to various health conditions. 9 Qs 9.0%
Confidential • Student Study Edition • Practice & Review Guide Page 1 of 51
,STUDENT STUDY & MASTERY EDITION PRACTICE & REVIEW GUIDE
Hypertension and Vascular This topic discusses hypertension, its causes, and its effects
Health on vascular health. 9 Qs 9.0%
This topic focuses on reproductive health disorders and their
Reproductive Health Issues physiological implications. 9 Qs 9.0%
Chronic Diseases and Their This topic examines chronic diseases, their presentations,
Management and management strategies. 9 Qs 9.0%
This topic focuses on acute health conditions and their
Acute Health Conditions immediate clinical considerations. 9 Qs 9.0%
Total Exam Coverage 11 Integrated Topic Modules 100 Qs 100.0%
Confidential • Student Study Edition • Practice & Review Guide Page 2 of 51
,STUDENT STUDY & MASTERY EDITION PRACTICE & REVIEW GUIDE
TOPIC 1: ENDOCRINE SYSTEM DISORDERS
10 Questions • 10.0% of Exam • This topic covers hormonal imbalances and related disorders affecting metabolic functions.
QUESTION 1
An 32-year-old man presents with fatigue, weight gain, cold intolerance, and
constipation. Serum T4 is 0.6 ng/dL (low) and TSH is 12 mIU/L (elevated). The thyroid
gland fails to produce adequate hormone, prompting increased pituitary secretion.
Which feedback mechanism best explains the elevated TSH in this patient?
[A] Negative feedback by thyroxine on pituitary
[B] Positive feedback by TSH on thyroid
[C] Negative feedback by cortisol
[D] Positive feedback by T4 on pituitary
Correct Answer: Negative feedback by thyroxine on pituitary.
Rationale: TSH rises because low thyroid hormone fails to inhibit pituitary via negative feedback in the
hypothalamic-pituitary-thyroid axis.
QUESTION 2
A 58-year-old man reports progressive weight gain, purple striae, and easy bruising.
Serum cortisol is 48 µg/dL (normal 5-23) and ACTH is 4 pg/mL (normal 10-60). Imaging
reveals a 2-cm adrenal cortical adenoma. Which mechanism most likely accounts for
the low ACTH level?
[A] Negative feedback from excess cortisol
[B] Decreased CRH secretion
[C] Loss of POMC expression
[D] Inhibition of ACTH synthesis by adrenal tumor
Correct Answer: Negative feedback from excess cortisol.
Rationale: The tumor produces cortisol autonomously, suppressing pituitary ACTH via negative feedback.
Confidential • Student Study Edition • Practice & Review Guide Page 3 of 51
, STUDENT STUDY & MASTERY EDITION PRACTICE & REVIEW GUIDE
QUESTION 3
A 29-year-old woman presents with 6-month history of primary infertility and
amenorrhea. Her serum LH is 2 mIU/mL, FSH 6 mIU/mL, estradiol 30 pg/mL, and
transvaginal ultrasound shows no developing follicles. She has no ovarian response to
gonadotropins. Which mechanism best explains this hormonal pattern?
[A] Decreased GnRH pulse frequency leading to low LH and FSH.
[B] Increased GnRH pulse frequency causing high LH and FSH.
[C] Resistance to estradiol negative feedback at the pituitary.
[D] Excessive prolactin inhibiting GnRH secretion.
Correct Answer: Decreased GnRH pulse frequency leading to low LH and FSH.
Rationale: Low LH/FSH and estradiol indicate a reduced GnRH pulse frequency; estradiol feedback is insufficient in the
hypothalamus.
QUESTION 4
A 45-year-old man presents with progressive fatigue, unintentional weight gain, and
intolerance to cold over the last 3 months. Physical exam reveals dry skin and
bradycardia. Which hormone deficiency most likely explains these findings?
[A] T3
[B] T4
[C] ACTH
[D] GH
Correct Answer: T4.
Rationale: Low T4 causes hypothyroid symptoms such as fatigue, weight gain, and cold intolerance.
Confidential • Student Study Edition • Practice & Review Guide Page 4 of 51
