,BIOD 151 Module 6 | Practice Q&A | 2026/2027 | Anatomy | Portage
Learning
1. What is the primary function of the endocrine system?
A) To transmit electrical signals rapidly throughout the body
B) To coordinate body functions through the release of hormones into the
bloodstream
C) To filter waste products from the blood
D) To provide structural support for the body
Correct Answer: To coordinate body functions through the release of
hormones into the bloodstream
Rationale: The endocrine system coordinates body functions by releasing
hormones into the bloodstream. The nervous system transmits electrical
signals rapidly. Filtering wastes is renal function, and structural support is
skeletal function .
2. Which is a major difference between the endocrine system and the
nervous system?
A) The endocrine system is fast-acting; the nervous system is slow-acting
B) The nervous system uses hormones; the endocrine system uses
neurotransmitters
C) The endocrine system is slower acting, uses hormones, and uses the
bloodstream to reach targets
D) Both systems use the same chemical messengers
Correct Answer: The endocrine system is slower acting, uses hormones, and
uses the bloodstream to reach targets
,Rationale: The endocrine system is slower acting, uses hormones, and uses
the bloodstream. The nervous system is fast acting and uses
neurotransmitters. This distinction is fundamental to understanding the two
communication systems .
3. What are the two major groups of hormones?
A) Proteins and carbohydrates
B) Peptide hormones and steroid hormones
C) Lipids and nucleic acids
D) Amino acids and fatty acids
Correct Answer: Peptide hormones and steroid hormones
Rationale: The two major groups of hormones are peptide hormones (derived
from proteins and catecholamines) and steroid hormones (derived from
cholesterol). This classification is based on their chemical structure and
mechanism of action .
4. Steroid hormones are derived from which molecule?
A) Glucose
B) Cholesterol
C) Amino acids
D) Fatty acids
Correct Answer: Cholesterol
Rationale: Steroid hormones are derived from cholesterol. Peptide hormones
are derived from proteins and catecholamines. This chemical origin
determines how hormones are synthesized and how they interact with target
cells .
, 5. Which type of hormone reacts faster with target cells?
A) Steroid hormones
B) Peptide hormones
C) Both react at the same speed
D) Neither reacts quickly
Correct Answer: Peptide hormones
Rationale: Peptide hormones react faster because they quickly activate
existing enzymes in the cell. Steroid hormones are slower acting because
they alter protein synthesis in the nucleus. This speed difference is clinically
significant .
6. Which type of hormone has a longer duration of action?
A) Peptide hormones
B) Steroid hormones
C) Both have the same duration
D) Neither has a lasting effect
Correct Answer: Steroid hormones
Rationale: Steroid hormones have a longer duration because they alter
protein synthesis in the nucleus. Peptide hormones act quickly but only for a
short time. This explains why steroid hormone effects can persist longer .
7. True or False: Endocrine glands contain ducts and secrete their contents
directly into an epithelial lining.
A) True
Learning
1. What is the primary function of the endocrine system?
A) To transmit electrical signals rapidly throughout the body
B) To coordinate body functions through the release of hormones into the
bloodstream
C) To filter waste products from the blood
D) To provide structural support for the body
Correct Answer: To coordinate body functions through the release of
hormones into the bloodstream
Rationale: The endocrine system coordinates body functions by releasing
hormones into the bloodstream. The nervous system transmits electrical
signals rapidly. Filtering wastes is renal function, and structural support is
skeletal function .
2. Which is a major difference between the endocrine system and the
nervous system?
A) The endocrine system is fast-acting; the nervous system is slow-acting
B) The nervous system uses hormones; the endocrine system uses
neurotransmitters
C) The endocrine system is slower acting, uses hormones, and uses the
bloodstream to reach targets
D) Both systems use the same chemical messengers
Correct Answer: The endocrine system is slower acting, uses hormones, and
uses the bloodstream to reach targets
,Rationale: The endocrine system is slower acting, uses hormones, and uses
the bloodstream. The nervous system is fast acting and uses
neurotransmitters. This distinction is fundamental to understanding the two
communication systems .
3. What are the two major groups of hormones?
A) Proteins and carbohydrates
B) Peptide hormones and steroid hormones
C) Lipids and nucleic acids
D) Amino acids and fatty acids
Correct Answer: Peptide hormones and steroid hormones
Rationale: The two major groups of hormones are peptide hormones (derived
from proteins and catecholamines) and steroid hormones (derived from
cholesterol). This classification is based on their chemical structure and
mechanism of action .
4. Steroid hormones are derived from which molecule?
A) Glucose
B) Cholesterol
C) Amino acids
D) Fatty acids
Correct Answer: Cholesterol
Rationale: Steroid hormones are derived from cholesterol. Peptide hormones
are derived from proteins and catecholamines. This chemical origin
determines how hormones are synthesized and how they interact with target
cells .
, 5. Which type of hormone reacts faster with target cells?
A) Steroid hormones
B) Peptide hormones
C) Both react at the same speed
D) Neither reacts quickly
Correct Answer: Peptide hormones
Rationale: Peptide hormones react faster because they quickly activate
existing enzymes in the cell. Steroid hormones are slower acting because
they alter protein synthesis in the nucleus. This speed difference is clinically
significant .
6. Which type of hormone has a longer duration of action?
A) Peptide hormones
B) Steroid hormones
C) Both have the same duration
D) Neither has a lasting effect
Correct Answer: Steroid hormones
Rationale: Steroid hormones have a longer duration because they alter
protein synthesis in the nucleus. Peptide hormones act quickly but only for a
short time. This explains why steroid hormone effects can persist longer .
7. True or False: Endocrine glands contain ducts and secrete their contents
directly into an epithelial lining.
A) True
