BIOD 151 Essential Human Anatomy & Physiology I:
Endocrine System Exam 2026/2027 Modules 1–7
Portage Learning Cumulative Master Question Bank
Questions with Verified Answers & Full Rationales
(GUARANTEED PASS)
This BIOD 151 Endocrine System Exam is a comprehensive question
bank for
Module 1 – 7 of Portage Learning's Essential Human Anatomy &
Physiology I course . Covering all major endocrine organs—
pituitary, thyroid, parathyroid, adrenal, and pancreas—it includes
verified questions with detailed rationales on hormones, feedback
mechanisms, and clinical disorders to guarantee success on the
Module1 – 7 assessment. This updated 2026/2027 study guide
delivers 500 premium, multi-module multiple-choice questions
specifically engineered to ace the BIOD 151 Human Anatomy and
Physiology I exams. Every question contains a verified bold italicized
,answer and a high-yield physiological rationale breaking down
complex tissue systems, skeletal mechanics, and endocrine
pathways. It serves as the ultimate high-density resource for
maximizing test scores and boosting digital marketplace sales.
Module 1: Foundational Principles & Receptor Mechanics
Question 1
Which of the following cellular structures directly allows target
cells to recognize and respond to specific circulating hormones?
• A) Sodium-potassium pumps
• B) Plasma membrane or intracellular receptors
• C) Lysosomal hydrolytic enzymes
• D) Gap junction connexons
Correct Answer: B) Plasma membrane or intracellular
receptors
Rationale: Hormones circulate throughout the entire body via
the bloodstream, but they only affect specific target cells that
,express complementary receptors. Lipid-insoluble hormones
(like peptides and catecholamines) bind to extracellular plasma
membrane receptors, whereas lipid-soluble hormones (like
steroids and thyroid hormones) diffuse through the lipid
bilayer to bind to intracellular receptors.
Question 2
A patient is diagnosed with an endocrine tumor that hypersecretes
a hydrophilic peptide hormone. Which second messenger cascade is
most likely activated downstream in the target cells?
• A) Direct transcription factor binding
• B) Open nuclear pore transport
• C) Cyclic adenosine monophosphate (cAMP) production
• D) Intracellular cholesterol cleavage
Correct Answer: C) Cyclic adenosine monophosphate (cAMP)
production
Rationale: Hydrophilic peptide hormones cannot cross the
hydrophobic lipid bilayer. They must bind to extracellular G-
protein coupled receptors (GPCRs), which activate adenylate
, cyclase to convert ATP into cAMP, the classic intracellular
second messenger.
Question 3
How do lipophilic steroid hormones exert their physiological actions
within target tissues?
• A) By opening ligand-gated ion channels on the plasma
membrane
• B) By activating adenylate cyclase inside the cytoplasm
• C) By altering gene expression via binding to intracellular
receptors
• D) By generating cyclic GMP via nitric oxide activation
Correct Answer: C) By altering gene expression via binding to
intracellular receptors
Rationale: Lipophilic steroid hormones are derived from
cholesterol and easily diffuse directly through cell membranes.
Once inside, they bind to cytosolic or nuclear receptors,
forming a hormonereceptor complex that acts as a
transcription factor to alter protein synthesis.
Endocrine System Exam 2026/2027 Modules 1–7
Portage Learning Cumulative Master Question Bank
Questions with Verified Answers & Full Rationales
(GUARANTEED PASS)
This BIOD 151 Endocrine System Exam is a comprehensive question
bank for
Module 1 – 7 of Portage Learning's Essential Human Anatomy &
Physiology I course . Covering all major endocrine organs—
pituitary, thyroid, parathyroid, adrenal, and pancreas—it includes
verified questions with detailed rationales on hormones, feedback
mechanisms, and clinical disorders to guarantee success on the
Module1 – 7 assessment. This updated 2026/2027 study guide
delivers 500 premium, multi-module multiple-choice questions
specifically engineered to ace the BIOD 151 Human Anatomy and
Physiology I exams. Every question contains a verified bold italicized
,answer and a high-yield physiological rationale breaking down
complex tissue systems, skeletal mechanics, and endocrine
pathways. It serves as the ultimate high-density resource for
maximizing test scores and boosting digital marketplace sales.
Module 1: Foundational Principles & Receptor Mechanics
Question 1
Which of the following cellular structures directly allows target
cells to recognize and respond to specific circulating hormones?
• A) Sodium-potassium pumps
• B) Plasma membrane or intracellular receptors
• C) Lysosomal hydrolytic enzymes
• D) Gap junction connexons
Correct Answer: B) Plasma membrane or intracellular
receptors
Rationale: Hormones circulate throughout the entire body via
the bloodstream, but they only affect specific target cells that
,express complementary receptors. Lipid-insoluble hormones
(like peptides and catecholamines) bind to extracellular plasma
membrane receptors, whereas lipid-soluble hormones (like
steroids and thyroid hormones) diffuse through the lipid
bilayer to bind to intracellular receptors.
Question 2
A patient is diagnosed with an endocrine tumor that hypersecretes
a hydrophilic peptide hormone. Which second messenger cascade is
most likely activated downstream in the target cells?
• A) Direct transcription factor binding
• B) Open nuclear pore transport
• C) Cyclic adenosine monophosphate (cAMP) production
• D) Intracellular cholesterol cleavage
Correct Answer: C) Cyclic adenosine monophosphate (cAMP)
production
Rationale: Hydrophilic peptide hormones cannot cross the
hydrophobic lipid bilayer. They must bind to extracellular G-
protein coupled receptors (GPCRs), which activate adenylate
, cyclase to convert ATP into cAMP, the classic intracellular
second messenger.
Question 3
How do lipophilic steroid hormones exert their physiological actions
within target tissues?
• A) By opening ligand-gated ion channels on the plasma
membrane
• B) By activating adenylate cyclase inside the cytoplasm
• C) By altering gene expression via binding to intracellular
receptors
• D) By generating cyclic GMP via nitric oxide activation
Correct Answer: C) By altering gene expression via binding to
intracellular receptors
Rationale: Lipophilic steroid hormones are derived from
cholesterol and easily diffuse directly through cell membranes.
Once inside, they bind to cytosolic or nuclear receptors,
forming a hormonereceptor complex that acts as a
transcription factor to alter protein synthesis.
