Chapter 18: The Endocrine System Test
Bank Questions and All Actual Answers
2026-2027 Updated.
All of the following are true of the nervous system, except that it doesn't
A) respond rapidly to stimuli.
B) respond specifically to stimuli.
C) communicate by the release of neurotransmitters.
D) respond with motor output.
E) function independently of the endocrine system. - Answer function independently of the
endocrine system.
Endocrine cells
A) are a type of nerve cell.
B) release their secretions onto an epithelial surface.
C) release their secretions directly into body fluids.
D) contain few vesicles.
E) are modified connective-tissue cells. - Answer release their secretions directly into body
fluids.
Hormones known as "catecholamines" are
A) lipids.
B) peptides.
C) steroids.
D) derivatives of the amino acid tyrosine.
E) derivatives of reproductive glands. - Answer derivatives of the amino acid tyrosine.
Peptide hormones are
A) composed of amino acids.
B) produced by the suprarenal glands.
C) derived from the amino acid tyrosine.
D) lipids.
E) chemically related to cholesterol. - Answer composed of amino acids.
All of the following are true of steroid hormones, except that they
,A) are produced by the suprarenal medulla.
B) are derived from cholesterol.
C) are produced by reproductive glands.
D) bind to receptors within the cell.
E) are lipids. - Answer are produced by the suprarenal medulla.
Each of the following hormones is an amino acid derivative, except
A) epinephrine.
B) norepinephrine.
C) thyroid hormone.
D) thyroid-stimulating hormone.
E) melatonin. - Answer thyroid-stimulating hormone.
Extracellular membrane receptors are used by which of the following types of hormones?
A) catecholamines
B) peptide hormones
C) eicosanoids
D) thyroid
E) A, B, and C only - Answer A, B, and C only
Steroid hormones
A) are proteins.
B) cannot diffuse through cell membranes.
C) bind to receptors in the nucleus of their target cells.
D) remain in circulation for relatively short periods of time. E) are transported in the blood
dissolved in the plasma. - Answer bind to receptors in the nucleus of their target cells.
When a catecholamine or peptide hormone binds to receptors on the surface of a cell, the
A) hormone receptor complex moves into the cytoplasm. B) cell membrane becomes
depolarized.
C) second messenger appears in the cytoplasm.
D) cell becomes inactive.
E) hormone is transported to the nucleus where it alters the activity of DNA. - Answer second
messenger appears in the cytoplasm.
, Hormones can be divided into different groups based on their chemistry. These categories
include
A) peptides.
B) steroids.
C) eicosanoids.
D) amino acid derivatives.
E) all of the above - Answer all of the above
Hormonal actions on cells include those that affect
A) quantities of enzymes.
B) activities of enzymes.
C) synthesis of enzymes.
D) gating of ion channels.
E) any of the above - Answer any of the above
The link between a first messenger and a second messenger in a cell that responds to peptide
hormones is usually
A) cAMP.
B) cGMP.
C) adenyl cyclase.
D) a G protein.
E) calcium ion levels. - Answer a G protein.
When adenyl cyclase is activated,
A) ATP is consumed.
B) cAMP is formed.
C) cAMP is broken down.
D) B, C, and D
E) only A and B - Answer only A and B
After a steroid hormone binds to its receptor to form an active complex,
A) adenyl cyclase is activated.
B) cyclic nucleotides are formed.
C) G proteins are phosphylated.
D) gene transcription is initiated.
Bank Questions and All Actual Answers
2026-2027 Updated.
All of the following are true of the nervous system, except that it doesn't
A) respond rapidly to stimuli.
B) respond specifically to stimuli.
C) communicate by the release of neurotransmitters.
D) respond with motor output.
E) function independently of the endocrine system. - Answer function independently of the
endocrine system.
Endocrine cells
A) are a type of nerve cell.
B) release their secretions onto an epithelial surface.
C) release their secretions directly into body fluids.
D) contain few vesicles.
E) are modified connective-tissue cells. - Answer release their secretions directly into body
fluids.
Hormones known as "catecholamines" are
A) lipids.
B) peptides.
C) steroids.
D) derivatives of the amino acid tyrosine.
E) derivatives of reproductive glands. - Answer derivatives of the amino acid tyrosine.
Peptide hormones are
A) composed of amino acids.
B) produced by the suprarenal glands.
C) derived from the amino acid tyrosine.
D) lipids.
E) chemically related to cholesterol. - Answer composed of amino acids.
All of the following are true of steroid hormones, except that they
,A) are produced by the suprarenal medulla.
B) are derived from cholesterol.
C) are produced by reproductive glands.
D) bind to receptors within the cell.
E) are lipids. - Answer are produced by the suprarenal medulla.
Each of the following hormones is an amino acid derivative, except
A) epinephrine.
B) norepinephrine.
C) thyroid hormone.
D) thyroid-stimulating hormone.
E) melatonin. - Answer thyroid-stimulating hormone.
Extracellular membrane receptors are used by which of the following types of hormones?
A) catecholamines
B) peptide hormones
C) eicosanoids
D) thyroid
E) A, B, and C only - Answer A, B, and C only
Steroid hormones
A) are proteins.
B) cannot diffuse through cell membranes.
C) bind to receptors in the nucleus of their target cells.
D) remain in circulation for relatively short periods of time. E) are transported in the blood
dissolved in the plasma. - Answer bind to receptors in the nucleus of their target cells.
When a catecholamine or peptide hormone binds to receptors on the surface of a cell, the
A) hormone receptor complex moves into the cytoplasm. B) cell membrane becomes
depolarized.
C) second messenger appears in the cytoplasm.
D) cell becomes inactive.
E) hormone is transported to the nucleus where it alters the activity of DNA. - Answer second
messenger appears in the cytoplasm.
, Hormones can be divided into different groups based on their chemistry. These categories
include
A) peptides.
B) steroids.
C) eicosanoids.
D) amino acid derivatives.
E) all of the above - Answer all of the above
Hormonal actions on cells include those that affect
A) quantities of enzymes.
B) activities of enzymes.
C) synthesis of enzymes.
D) gating of ion channels.
E) any of the above - Answer any of the above
The link between a first messenger and a second messenger in a cell that responds to peptide
hormones is usually
A) cAMP.
B) cGMP.
C) adenyl cyclase.
D) a G protein.
E) calcium ion levels. - Answer a G protein.
When adenyl cyclase is activated,
A) ATP is consumed.
B) cAMP is formed.
C) cAMP is broken down.
D) B, C, and D
E) only A and B - Answer only A and B
After a steroid hormone binds to its receptor to form an active complex,
A) adenyl cyclase is activated.
B) cyclic nucleotides are formed.
C) G proteins are phosphylated.
D) gene transcription is initiated.
