PHGY 216 Midterm Exam | Complete Study Guide with
Practice Questions & Verified Answers | GRADED A+ |
LATEST UPDATE 2026/2027 | Guaranteed Pass.
What makes the endocrine system different from other physiological systems?
CORRECTANSWER It is composed of many separate glands dispersed throughout the
body rather than one connected structure.
How do endocrine glands function as a coordinated system? -CORRECTANSWER
They all secrete hormones that interact functionally to regulate body processes.
What is the main role of the endocrine system? -CORRECTANSWER It regulates body
functions using hormones to maintain homeostasis and control long-term processes.
How do hormones reach their target tissues? -CORRECTANSWER They are secreted
directly into the bloodstream and travel to distant target cells.
How does the endocrine system affect growth and development? -CORRECTANSWER
It regulates cell growth, tissue development, and maturation.
,How does the endocrine system regulate reproduction? -CORRECTANSWER It controls
sexual development, gamete production, and reproductive cycles.
How does the endocrine system contribute to red blood cell production?
CORRECTANSWER It regulates hormones that stimulate red blood cell formation.
How does the endocrine system integrate with the autonomic nervous system? -
CORRECTANSWER It helps regulate circulation and digestive functions.
Six Major Functions of the Endocrine System -CORRECTANSWER
What is the first major function of the endocrine system? -CORRECTANSWER
Maintaining a constant internal environment by regulating metabolism and
water/electrolyte balance.
What is the endocrine system's role in stress? -CORRECTANSWER It produces
adaptive stress responses.
Hormones - General Concepts -CORRECTANSWER
What is a hormone? -CORRECTANSWER A chemical substance secreted into the
,blood that exerts effects on distant target tissues.
Why do hormones act only on specific cells? -CORRECTANSWER Only cells with the
appropriate receptors can respond to a hormone.
What does hydrophilic mean? -CORRECTANSWER Highly water-soluble and poorly
lipid-soluble.
What does lipophilic mean? -CORRECTANSWER Highly lipid-soluble and poorly
watersoluble.
Hydrophilic Hormones -CORRECTANSWER
How do hydrophilic hormones travel in the blood? -CORRECTANSWER Mostly
unbound to carrier proteins.
What types of hormones are hydrophilic? -CORRECTANSWER Peptide hormones and
most amine hormones.
What are peptide hormones made of? -CORRECTANSWER Short or long chains of
amino acids.
, What are amine hormones derived from? -CORRECTANSWER Single amino acid
residues.
What are the two types of amine hormones? -CORRECTANSWER Catecholamines and
thyroid hormones.
What determines a hormone's target cell? -CORRECTANSWER The presence of
specific receptors on the cell.
Hormone Classification -CORRECTANSWER
What are the two major categories of hormones? -CORRECTANSWER Hydrophilic
hormones and lipophilic hormones.
Which amine hormones are catecholamines? -CORRECTANSWER Epinephrine and
norepinephrine.
Why are thyroid hormones an exception among amines? -CORRECTANSWER They
are lipophilic, not hydrophilic.
What is unique about catecholamines in the blood? -CORRECTANSWER They can be
found both free and bound to carrier molecules.
Practice Questions & Verified Answers | GRADED A+ |
LATEST UPDATE 2026/2027 | Guaranteed Pass.
What makes the endocrine system different from other physiological systems?
CORRECTANSWER It is composed of many separate glands dispersed throughout the
body rather than one connected structure.
How do endocrine glands function as a coordinated system? -CORRECTANSWER
They all secrete hormones that interact functionally to regulate body processes.
What is the main role of the endocrine system? -CORRECTANSWER It regulates body
functions using hormones to maintain homeostasis and control long-term processes.
How do hormones reach their target tissues? -CORRECTANSWER They are secreted
directly into the bloodstream and travel to distant target cells.
How does the endocrine system affect growth and development? -CORRECTANSWER
It regulates cell growth, tissue development, and maturation.
,How does the endocrine system regulate reproduction? -CORRECTANSWER It controls
sexual development, gamete production, and reproductive cycles.
How does the endocrine system contribute to red blood cell production?
CORRECTANSWER It regulates hormones that stimulate red blood cell formation.
How does the endocrine system integrate with the autonomic nervous system? -
CORRECTANSWER It helps regulate circulation and digestive functions.
Six Major Functions of the Endocrine System -CORRECTANSWER
What is the first major function of the endocrine system? -CORRECTANSWER
Maintaining a constant internal environment by regulating metabolism and
water/electrolyte balance.
What is the endocrine system's role in stress? -CORRECTANSWER It produces
adaptive stress responses.
Hormones - General Concepts -CORRECTANSWER
What is a hormone? -CORRECTANSWER A chemical substance secreted into the
,blood that exerts effects on distant target tissues.
Why do hormones act only on specific cells? -CORRECTANSWER Only cells with the
appropriate receptors can respond to a hormone.
What does hydrophilic mean? -CORRECTANSWER Highly water-soluble and poorly
lipid-soluble.
What does lipophilic mean? -CORRECTANSWER Highly lipid-soluble and poorly
watersoluble.
Hydrophilic Hormones -CORRECTANSWER
How do hydrophilic hormones travel in the blood? -CORRECTANSWER Mostly
unbound to carrier proteins.
What types of hormones are hydrophilic? -CORRECTANSWER Peptide hormones and
most amine hormones.
What are peptide hormones made of? -CORRECTANSWER Short or long chains of
amino acids.
, What are amine hormones derived from? -CORRECTANSWER Single amino acid
residues.
What are the two types of amine hormones? -CORRECTANSWER Catecholamines and
thyroid hormones.
What determines a hormone's target cell? -CORRECTANSWER The presence of
specific receptors on the cell.
Hormone Classification -CORRECTANSWER
What are the two major categories of hormones? -CORRECTANSWER Hydrophilic
hormones and lipophilic hormones.
Which amine hormones are catecholamines? -CORRECTANSWER Epinephrine and
norepinephrine.
Why are thyroid hormones an exception among amines? -CORRECTANSWER They
are lipophilic, not hydrophilic.
What is unique about catecholamines in the blood? -CORRECTANSWER They can be
found both free and bound to carrier molecules.
