BIOS 256 Exam 1
Anatomy & Physiology IV With Lab
Competency Assessment
2026/2027 Academic Year
Exact Official Question Count: 50 Multiple-Choice Questions (MCQ)
Format: Single-Best-Answer with Four Options (A, B, C, D)
Testing Time: 75 Minutes
Passing Score: 75–80% (38–40/50 Correct)
Aligned with HAPS Curriculum Standards
Core Assessment Domains
1. Endocrine System Structure & Function (Q1–Q10)
2. Special Senses Anatomy & Physiology (Q11–Q18)
3. Cardiovascular System: Heart Anatomy (Q19–Q25)
4. Cardiac Physiology & Electrophysiology (Q26–Q32)
5. Blood Vessels & Hemodynamics (Q33–Q38)
6. Lymphatic & Immune System Foundations (Q39–Q45)
7. Laboratory Skills & Histology Correlation (Q46–Q50)
,Abstract
This document presents the BIOS 256 Exam 1 competency assessment for the 2026/2027
academic year, comprising 50 multiple-choice questions aligned with undergraduate health
sciences curriculum standards for Anatomy & Physiology IV with Lab. The examination covers
seven core domains: endocrine system structure and function, including hormone classification,
hypothalamic-pituitary axis regulation, and pancreatic islet counterregulation; special senses
anatomy and physiology, encompassing olfaction, gustation, vision, hearing, and equilibrium
transduction pathways; cardiovascular heart anatomy, including pericardial layers, chamber
structures, valve mechanics, and coronary circulation; cardiac physiology and electrophysiology,
addressing autorhythmicity, action potential phases, conduction system sequencing, ECG
correlation, and cardiac output determinants; blood vessels and hemodynamics, covering vessel
classification, capillary exchange dynamics, baroreceptor reflexes, and the renin-angiotensin-
aldosterone system; lymphatic and immune system foundations, including lymphoid organ
function, innate and adaptive immunity mechanisms, and antigen presentation pathways; and
laboratory skills with histology correlation, focusing on microscopy, tissue identification, and
physiological data interpretation. Each question includes a detailed rationale explaining the
anatomical and physiological basis for the correct answer, promoting conceptual understanding
over rote memorization.
Keywords: BIOS 256, Anatomy and Physiology, Endocrine System, Special Senses,
Cardiovascular System, Cardiac Electrophysiology, Hemodynamics, Lymphatic System,
Immune System, Histology, Competency Assessment, HAPS Standards
Examination Instructions
• This examination consists of 50 multiple-choice questions. Select the single best answer for
each question unless otherwise indicated as Select-All-That-Apply (SATA).
• Each question has four options (A, B, C, D). Mark only one answer per question.
• The total testing time is 75 minutes. Pace yourself accordingly (approximately 1.5 minutes
per question).
• Correct answers are highlighted in bold purple. Detailed rationales are provided in italic
text with a lavender background following each question.
• A passing score of 75–80% (38–40 correct answers out of 50) is typically required per
undergraduate health sciences program policy.
• This assessment is aligned with Human Anatomy and Physiology Society (HAPS) learning
outcomes and current anatomy and physiology textbook standards (Marieb/Hoehn,
Saladin).
BIOS 256 Exam 1 — 50 Multiple-Choice Questions
Domain 1: Endocrine System Structure & Function (Q1–Q10)
1. Which of the following hormones is classified as a peptide hormone?
A) Cortisol
B) Insulin
C) Aldosterone
D) Testosterone
Rationale: Insulin is a peptide hormone composed of 51 amino acids arranged in two chains (A
and B) connected by disulfide bonds. Peptide hormones are synthesized as larger precursor
molecules (preproinsulin) that undergo post-translational modification, are stored in secretory
vesicles, and bind to cell-surface receptors to initiate intracellular second-messenger cascades.
In contrast, cortisol, aldosterone, and testosterone are steroid hormones derived from
, cholesterol that cross the plasma membrane and bind intracellular receptors to directly
modulate gene transcription.
2. The hypothalamic-hypophyseal portal system carries releasing and inhibiting
hormones from the hypothalamus directly to which structure?
A) Posterior pituitary
B) Anterior pituitary
C) Thyroid gland
D) Adrenal cortex
Rationale: The hypothalamic-hypophyseal portal system is a specialized capillary network that
transports hypothalamic releasing and inhibiting hormones (e.g., GHRH, TRH, CRH, GnRH,
somatostatin, dopamine) directly from the median eminence of the hypothalamus to the
anterior pituitary (adenohypophysis) without first entering the systemic circulation. This portal
arrangement ensures that these hormones reach their target cells in the anterior pituitary at
high concentrations. The posterior pituitary (neurohypophysis) receives direct neuronal
projections from the supraoptic and paraventricular nuclei rather than blood-borne signals via
this portal system.
3. Which anterior pituitary hormone stimulates the adrenal cortex to secrete
glucocorticoids?
A) Thyroid-stimulating hormone (TSH)
B) Growth hormone (GH)
C) Adrenocorticotropic hormone (ACTH)
D) Follicle-stimulating hormone (FSH)
Rationale: Adrenocorticotropic hormone (ACTH), also known as corticotropin, is produced by
corticotroph cells of the anterior pituitary under the stimulatory control of hypothalamic
corticotropin-releasing hormone (CRH). ACTH acts on the adrenal cortex—specifically the zona
fasciculata—to stimulate the synthesis and secretion of glucocorticoids, principally cortisol. TSH
targets the thyroid gland, GH targets the liver and other tissues to produce IGFs, and FSH
targets the gonads to promote gametogenesis.
4. Antidiuretic hormone (ADH) is synthesized in the hypothalamus but released
from the posterior pituitary. Which hypothalamic nuclei produce ADH?
A) Arcuate nucleus and ventromedial nucleus
B) Supraoptic nucleus and paraventricular nucleus
C) Dorsomedial nucleus and preoptic area
D) Suprachiasmatic nucleus and mammillary body
Rationale: Antidiuretic hormone (ADH, vasopressin) is synthesized by neurosecretory cells in
the supraoptic and paraventricular nuclei of the hypothalamus. These neurons extend their
axons down the hypothalamo-hypophyseal tract to terminate in the posterior pituitary
(neurohypophysis), where ADH is stored in Herring bodies and released into the bloodstream in
response to increased plasma osmolarity (detected by osmoreceptors) or decreased blood
volume (detected by baroreceptors). The posterior pituitary does not synthesize ADH; it merely
stores and releases it.
5. Which of the following best describes the mechanism of thyroid hormone
synthesis involving thyroglobulin?
Anatomy & Physiology IV With Lab
Competency Assessment
2026/2027 Academic Year
Exact Official Question Count: 50 Multiple-Choice Questions (MCQ)
Format: Single-Best-Answer with Four Options (A, B, C, D)
Testing Time: 75 Minutes
Passing Score: 75–80% (38–40/50 Correct)
Aligned with HAPS Curriculum Standards
Core Assessment Domains
1. Endocrine System Structure & Function (Q1–Q10)
2. Special Senses Anatomy & Physiology (Q11–Q18)
3. Cardiovascular System: Heart Anatomy (Q19–Q25)
4. Cardiac Physiology & Electrophysiology (Q26–Q32)
5. Blood Vessels & Hemodynamics (Q33–Q38)
6. Lymphatic & Immune System Foundations (Q39–Q45)
7. Laboratory Skills & Histology Correlation (Q46–Q50)
,Abstract
This document presents the BIOS 256 Exam 1 competency assessment for the 2026/2027
academic year, comprising 50 multiple-choice questions aligned with undergraduate health
sciences curriculum standards for Anatomy & Physiology IV with Lab. The examination covers
seven core domains: endocrine system structure and function, including hormone classification,
hypothalamic-pituitary axis regulation, and pancreatic islet counterregulation; special senses
anatomy and physiology, encompassing olfaction, gustation, vision, hearing, and equilibrium
transduction pathways; cardiovascular heart anatomy, including pericardial layers, chamber
structures, valve mechanics, and coronary circulation; cardiac physiology and electrophysiology,
addressing autorhythmicity, action potential phases, conduction system sequencing, ECG
correlation, and cardiac output determinants; blood vessels and hemodynamics, covering vessel
classification, capillary exchange dynamics, baroreceptor reflexes, and the renin-angiotensin-
aldosterone system; lymphatic and immune system foundations, including lymphoid organ
function, innate and adaptive immunity mechanisms, and antigen presentation pathways; and
laboratory skills with histology correlation, focusing on microscopy, tissue identification, and
physiological data interpretation. Each question includes a detailed rationale explaining the
anatomical and physiological basis for the correct answer, promoting conceptual understanding
over rote memorization.
Keywords: BIOS 256, Anatomy and Physiology, Endocrine System, Special Senses,
Cardiovascular System, Cardiac Electrophysiology, Hemodynamics, Lymphatic System,
Immune System, Histology, Competency Assessment, HAPS Standards
Examination Instructions
• This examination consists of 50 multiple-choice questions. Select the single best answer for
each question unless otherwise indicated as Select-All-That-Apply (SATA).
• Each question has four options (A, B, C, D). Mark only one answer per question.
• The total testing time is 75 minutes. Pace yourself accordingly (approximately 1.5 minutes
per question).
• Correct answers are highlighted in bold purple. Detailed rationales are provided in italic
text with a lavender background following each question.
• A passing score of 75–80% (38–40 correct answers out of 50) is typically required per
undergraduate health sciences program policy.
• This assessment is aligned with Human Anatomy and Physiology Society (HAPS) learning
outcomes and current anatomy and physiology textbook standards (Marieb/Hoehn,
Saladin).
BIOS 256 Exam 1 — 50 Multiple-Choice Questions
Domain 1: Endocrine System Structure & Function (Q1–Q10)
1. Which of the following hormones is classified as a peptide hormone?
A) Cortisol
B) Insulin
C) Aldosterone
D) Testosterone
Rationale: Insulin is a peptide hormone composed of 51 amino acids arranged in two chains (A
and B) connected by disulfide bonds. Peptide hormones are synthesized as larger precursor
molecules (preproinsulin) that undergo post-translational modification, are stored in secretory
vesicles, and bind to cell-surface receptors to initiate intracellular second-messenger cascades.
In contrast, cortisol, aldosterone, and testosterone are steroid hormones derived from
, cholesterol that cross the plasma membrane and bind intracellular receptors to directly
modulate gene transcription.
2. The hypothalamic-hypophyseal portal system carries releasing and inhibiting
hormones from the hypothalamus directly to which structure?
A) Posterior pituitary
B) Anterior pituitary
C) Thyroid gland
D) Adrenal cortex
Rationale: The hypothalamic-hypophyseal portal system is a specialized capillary network that
transports hypothalamic releasing and inhibiting hormones (e.g., GHRH, TRH, CRH, GnRH,
somatostatin, dopamine) directly from the median eminence of the hypothalamus to the
anterior pituitary (adenohypophysis) without first entering the systemic circulation. This portal
arrangement ensures that these hormones reach their target cells in the anterior pituitary at
high concentrations. The posterior pituitary (neurohypophysis) receives direct neuronal
projections from the supraoptic and paraventricular nuclei rather than blood-borne signals via
this portal system.
3. Which anterior pituitary hormone stimulates the adrenal cortex to secrete
glucocorticoids?
A) Thyroid-stimulating hormone (TSH)
B) Growth hormone (GH)
C) Adrenocorticotropic hormone (ACTH)
D) Follicle-stimulating hormone (FSH)
Rationale: Adrenocorticotropic hormone (ACTH), also known as corticotropin, is produced by
corticotroph cells of the anterior pituitary under the stimulatory control of hypothalamic
corticotropin-releasing hormone (CRH). ACTH acts on the adrenal cortex—specifically the zona
fasciculata—to stimulate the synthesis and secretion of glucocorticoids, principally cortisol. TSH
targets the thyroid gland, GH targets the liver and other tissues to produce IGFs, and FSH
targets the gonads to promote gametogenesis.
4. Antidiuretic hormone (ADH) is synthesized in the hypothalamus but released
from the posterior pituitary. Which hypothalamic nuclei produce ADH?
A) Arcuate nucleus and ventromedial nucleus
B) Supraoptic nucleus and paraventricular nucleus
C) Dorsomedial nucleus and preoptic area
D) Suprachiasmatic nucleus and mammillary body
Rationale: Antidiuretic hormone (ADH, vasopressin) is synthesized by neurosecretory cells in
the supraoptic and paraventricular nuclei of the hypothalamus. These neurons extend their
axons down the hypothalamo-hypophyseal tract to terminate in the posterior pituitary
(neurohypophysis), where ADH is stored in Herring bodies and released into the bloodstream in
response to increased plasma osmolarity (detected by osmoreceptors) or decreased blood
volume (detected by baroreceptors). The posterior pituitary does not synthesize ADH; it merely
stores and releases it.
5. Which of the following best describes the mechanism of thyroid hormone
synthesis involving thyroglobulin?
