,BIOL 252 Module 1 | Human Anatomy & Physiology II w/Lab Exam
Q&A | Portage Learning
1. Which of the following best describes the primary function of blood in the human
body?
A) To produce hormones that regulate metabolism
B) To transport oxygen, nutrients, hormones, and waste products throughout the body
C) To filter waste products from the bloodstream and produce urine
D) To generate electrical impulses for nerve transmission
Correct Answer: To transport oxygen, nutrients, hormones, and waste products
throughout the body
Rationale: Blood performs numerous critical functions, including the transportation of
respiratory gases, nutrients, hormones, and metabolic wastes. It also regulates pH and
temperature and provides protection through clotting and immunity. Hormone
production is primarily the role of endocrine glands, and urine production occurs in the
kidneys.
2. What is the primary difference between endocrine and exocrine glands?
A) Endocrine glands secrete hormones through ducts; exocrine glands are ductless
B) Endocrine glands release hormones directly into the bloodstream; exocrine glands use
ducts
C) Endocrine glands secrete only proteins; exocrine glands secrete only lipids
D) Endocrine glands are found only in the head region
,Correct Answer: Endocrine glands release hormones directly into the bloodstream;
exocrine glands use ducts
Rationale: Endocrine glands are ductless and release hormones directly into the
interstitial fluid and bloodstream. Exocrine glands use ducts to secrete substances such as
sweat, saliva, or digestive enzymes to epithelial surfaces. This is a fundamental distinction
between the two gland types.
3. Which of the following is an example of a steroid hormone?
A) Insulin
B) Epinephrine
C) Cortisol
D) Oxytocin
Correct Answer: Cortisol
Rationale: Cortisol is a steroid hormone derived from cholesterol. Insulin and oxytocin
are peptide hormones, and epinephrine is an amine hormone derived from tyrosine.
Steroid hormones are lipid-soluble and can cross the plasma membrane to bind to
intracellular receptors.
4. A hormone that is lipid-soluble will:
A) Bind to membrane receptors
B) Activate second messengers such as cAMP
C) Diffuse through the plasma membrane and bind to intracellular receptors
D) Be stored in large vesicles before release
, Correct Answer: Diffuse through the plasma membrane and bind to intracellular
receptors
Rationale: Lipid-soluble hormones, including steroids and thyroid hormones, can cross
the plasma membrane and bind to intracellular or nuclear receptors to alter gene
transcription. Water-soluble hormones bind to membrane receptors and use second
messengers such as cAMP.
5. Which second messenger is commonly activated by water-soluble hormones?
A) cAMP
B) DNA
C) ATP
D) Glucose
Correct Answer: cAMP
Rationale: Water-soluble hormones, such as peptide and amine hormones, typically bind
to membrane receptors and activate second messengers like cyclic AMP (cAMP) to
amplify the hormonal signal within the cell. DNA, ATP, and glucose are not second
messengers.
6. Which of the following correctly lists the levels of organization from simplest to most
complex?
A) Chemical, cellular, tissue, organ, organ system, organismal
B) Cellular, chemical, tissue, organ, organ system, organismal
Q&A | Portage Learning
1. Which of the following best describes the primary function of blood in the human
body?
A) To produce hormones that regulate metabolism
B) To transport oxygen, nutrients, hormones, and waste products throughout the body
C) To filter waste products from the bloodstream and produce urine
D) To generate electrical impulses for nerve transmission
Correct Answer: To transport oxygen, nutrients, hormones, and waste products
throughout the body
Rationale: Blood performs numerous critical functions, including the transportation of
respiratory gases, nutrients, hormones, and metabolic wastes. It also regulates pH and
temperature and provides protection through clotting and immunity. Hormone
production is primarily the role of endocrine glands, and urine production occurs in the
kidneys.
2. What is the primary difference between endocrine and exocrine glands?
A) Endocrine glands secrete hormones through ducts; exocrine glands are ductless
B) Endocrine glands release hormones directly into the bloodstream; exocrine glands use
ducts
C) Endocrine glands secrete only proteins; exocrine glands secrete only lipids
D) Endocrine glands are found only in the head region
,Correct Answer: Endocrine glands release hormones directly into the bloodstream;
exocrine glands use ducts
Rationale: Endocrine glands are ductless and release hormones directly into the
interstitial fluid and bloodstream. Exocrine glands use ducts to secrete substances such as
sweat, saliva, or digestive enzymes to epithelial surfaces. This is a fundamental distinction
between the two gland types.
3. Which of the following is an example of a steroid hormone?
A) Insulin
B) Epinephrine
C) Cortisol
D) Oxytocin
Correct Answer: Cortisol
Rationale: Cortisol is a steroid hormone derived from cholesterol. Insulin and oxytocin
are peptide hormones, and epinephrine is an amine hormone derived from tyrosine.
Steroid hormones are lipid-soluble and can cross the plasma membrane to bind to
intracellular receptors.
4. A hormone that is lipid-soluble will:
A) Bind to membrane receptors
B) Activate second messengers such as cAMP
C) Diffuse through the plasma membrane and bind to intracellular receptors
D) Be stored in large vesicles before release
, Correct Answer: Diffuse through the plasma membrane and bind to intracellular
receptors
Rationale: Lipid-soluble hormones, including steroids and thyroid hormones, can cross
the plasma membrane and bind to intracellular or nuclear receptors to alter gene
transcription. Water-soluble hormones bind to membrane receptors and use second
messengers such as cAMP.
5. Which second messenger is commonly activated by water-soluble hormones?
A) cAMP
B) DNA
C) ATP
D) Glucose
Correct Answer: cAMP
Rationale: Water-soluble hormones, such as peptide and amine hormones, typically bind
to membrane receptors and activate second messengers like cyclic AMP (cAMP) to
amplify the hormonal signal within the cell. DNA, ATP, and glucose are not second
messengers.
6. Which of the following correctly lists the levels of organization from simplest to most
complex?
A) Chemical, cellular, tissue, organ, organ system, organismal
B) Cellular, chemical, tissue, organ, organ system, organismal
