BIOL 2457 Human Anatomy and Physiology I Test 1 Questions and 100% Correct
Answers 2026/27 Update - UTA
1. Which is the correct sequence of hierarchical levels for anatomy and physiology?
a. cellular, molecular, tissue, organ, system, organism
b. Molecular, cellular, tissue, system, organ, organism
c. Molecular, cellular, organ, tissue, system, organism
d. Molecular, cellular, tissue, organ, system, organism
2. Which is the best example of a homeostatic control mechanism?
a. You are dehydrated and have low blood pressure, so your kidneys increase the
reabsorption of water.
b. You are exposed to the cold and, as a result, your brain sends signals to sweat
glands.
c. You have a lacerated blood vessel and platelets create a plug to stop the
bleeding through negative feedback.
d. More than one answer is correct.
3. What is the major difference between positive and negative feedback mechanisms that
regulate homeostasis?
a. Negative feedback creates a response that gradually stops the stimulus from
having an effect, while positive feedback enhances a response to the stimulus.
b. Positive feedback has beneficial consequences to homeostasis while negative
feedback has negative consequences.
c. Negative feedback regulates homeostasis against environmental stimuli while
positive feedback regulates homeostasis against internal stimuli.
d. Positive feedback mechanisms are much more common in the body.
4. Which body plane is indicated below?
a. Transverse
b. Mid-sagittal
c. Frontal
d. Para-sagittal
5. What is the most accurate definition of homeostasis?
a. Relatively constant internal conditions despite changing external conditions.
b. Changing the internal conditions to match the external conditions.
c. Unstable internal conditions that match changing external conditions.
d. None of the above are correct.
6. Which is an example of a decomposition reaction?
a. Glycogen being catabolized into glucose molecules.
b. New bonds being formed between amino acids.
c. A phosphate group is removed from ATP and added to glucose during a cell
respiration.
d. The anabolism of muscle tissue with proteins.
7. What makes a molecule organic compared to inorganic?
a. Presence of carbon and bonds that have sharing of electrons
b. Presence of carbon and covalent bonds
BIOL 2457 Human Anatomy and Physiology I Test 1
, c. Presence of carbon and nitrogen
d. The ability to be used as an energy source
e. Both A and B
8. Which statement is accurate regarding the function of DNA and RNA?
a. DNA directs the process of protein synthesis, while RNA is the genetic material
containing genes coding for proteins.
b. DNA is the genetic material that contains the instructions for building proteins,
while RNA carries out these instructions by directing protein synthesis.
c. DNA is the genetic material that contains the instructions for building chromatin,
while RNA contains the instructions for building ribosomes.
d. More than one answer is accurate.
9. Which of the below is a correct statement about the life-sustaining properties of water?
a. Water had reactivity in which it is involved in both the breakdown and synthesis
of compounds.
b. Water has a low heat capacity in which it absorbs and releases small amounts of
heat.
c. Water has a high heat of vaporization, meaning water vaporizes on when heat is
required by the body.
d. All are important properties of water.
10. The main storage carbohydrate is , and is formed by numerous molecules
of .
a. Starch, glucose
b. Glycogen, fructose
c. Glycogen, glucose
d. Glucose, monosaccharides
11. Which organic compound does not match its major function?
a. Triglycerides=source of stored energy
b. steroids=quick, easily used energy source
c. Globular proteins=regulation of growth and development
d. DNA=genetic information for making proteins
12. Macromolecules are broken down by and formed by ?
a. Dehydration synthesis, hydrolysis
b. Hydrolysis, dehydration synthesis
c. Hydrolysis, hydration synthesis
d. Dehydration, apoptosis
13. Which statement below is most correct about fibrous globular types of proteins?
a. Fibrous proteins are prone to denaturation because of their thin fibrous structure.
b. Globular proteins are structural proteins that are highly stable and have a low
chance of denaturation.
c. Fibrous proteins are important for catalysis and homeostasis.
d. Globular proteins are soluble in water, which allows them to be active in almost
all biological processes.
14. Which statement below is NOT correct regarding ATP?
a. ATP is the main energy-transfer molecule in the body.
BIOL 2457 Human Anatomy and Physiology I Test 1
Answers 2026/27 Update - UTA
1. Which is the correct sequence of hierarchical levels for anatomy and physiology?
a. cellular, molecular, tissue, organ, system, organism
b. Molecular, cellular, tissue, system, organ, organism
c. Molecular, cellular, organ, tissue, system, organism
d. Molecular, cellular, tissue, organ, system, organism
2. Which is the best example of a homeostatic control mechanism?
a. You are dehydrated and have low blood pressure, so your kidneys increase the
reabsorption of water.
b. You are exposed to the cold and, as a result, your brain sends signals to sweat
glands.
c. You have a lacerated blood vessel and platelets create a plug to stop the
bleeding through negative feedback.
d. More than one answer is correct.
3. What is the major difference between positive and negative feedback mechanisms that
regulate homeostasis?
a. Negative feedback creates a response that gradually stops the stimulus from
having an effect, while positive feedback enhances a response to the stimulus.
b. Positive feedback has beneficial consequences to homeostasis while negative
feedback has negative consequences.
c. Negative feedback regulates homeostasis against environmental stimuli while
positive feedback regulates homeostasis against internal stimuli.
d. Positive feedback mechanisms are much more common in the body.
4. Which body plane is indicated below?
a. Transverse
b. Mid-sagittal
c. Frontal
d. Para-sagittal
5. What is the most accurate definition of homeostasis?
a. Relatively constant internal conditions despite changing external conditions.
b. Changing the internal conditions to match the external conditions.
c. Unstable internal conditions that match changing external conditions.
d. None of the above are correct.
6. Which is an example of a decomposition reaction?
a. Glycogen being catabolized into glucose molecules.
b. New bonds being formed between amino acids.
c. A phosphate group is removed from ATP and added to glucose during a cell
respiration.
d. The anabolism of muscle tissue with proteins.
7. What makes a molecule organic compared to inorganic?
a. Presence of carbon and bonds that have sharing of electrons
b. Presence of carbon and covalent bonds
BIOL 2457 Human Anatomy and Physiology I Test 1
, c. Presence of carbon and nitrogen
d. The ability to be used as an energy source
e. Both A and B
8. Which statement is accurate regarding the function of DNA and RNA?
a. DNA directs the process of protein synthesis, while RNA is the genetic material
containing genes coding for proteins.
b. DNA is the genetic material that contains the instructions for building proteins,
while RNA carries out these instructions by directing protein synthesis.
c. DNA is the genetic material that contains the instructions for building chromatin,
while RNA contains the instructions for building ribosomes.
d. More than one answer is accurate.
9. Which of the below is a correct statement about the life-sustaining properties of water?
a. Water had reactivity in which it is involved in both the breakdown and synthesis
of compounds.
b. Water has a low heat capacity in which it absorbs and releases small amounts of
heat.
c. Water has a high heat of vaporization, meaning water vaporizes on when heat is
required by the body.
d. All are important properties of water.
10. The main storage carbohydrate is , and is formed by numerous molecules
of .
a. Starch, glucose
b. Glycogen, fructose
c. Glycogen, glucose
d. Glucose, monosaccharides
11. Which organic compound does not match its major function?
a. Triglycerides=source of stored energy
b. steroids=quick, easily used energy source
c. Globular proteins=regulation of growth and development
d. DNA=genetic information for making proteins
12. Macromolecules are broken down by and formed by ?
a. Dehydration synthesis, hydrolysis
b. Hydrolysis, dehydration synthesis
c. Hydrolysis, hydration synthesis
d. Dehydration, apoptosis
13. Which statement below is most correct about fibrous globular types of proteins?
a. Fibrous proteins are prone to denaturation because of their thin fibrous structure.
b. Globular proteins are structural proteins that are highly stable and have a low
chance of denaturation.
c. Fibrous proteins are important for catalysis and homeostasis.
d. Globular proteins are soluble in water, which allows them to be active in almost
all biological processes.
14. Which statement below is NOT correct regarding ATP?
a. ATP is the main energy-transfer molecule in the body.
BIOL 2457 Human Anatomy and Physiology I Test 1
