ATI TEAS 7 SCIENCE ACTUAL EXAM 2026/2027
Complete Questions and Answers Detailed Rationales
Graded A+ Pass Guaranteed - A+ Graded
TABLE OF CONTENTS
Section 1 | Human Anatomy & Physiology | Q1 – Q18
Section 2 | Biology (Micro, Genetics, Cellular) | Q19 – Q28
Section 3 | Chemistry | Q29 – Q36
Section 4 | Scientific Reasoning & Measurement | Q37 – Q44
Section 5 | Scientific Method & Data Interpretation | Q45 – Q50
Instructions: Choose the single best answer. Pass: 80% in 60 minutes.
══════════════════════════════════════
SECTION 1: HUMAN ANATOMY & PHYSIOLOGY Q1 – Q18
══════════════════════════════════════
Question 1 of 50
A 68-year-old patient with hypertension presents with fatigue and shortness of breath.
An ECG shows prolonged PR intervals. The nurse understands this indicates delayed
conduction through which structure?
A. Sinoatrial node
B. Atrioventricular node ✓ CORRECT
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
Rationale: The PR interval on an ECG represents the time from atrial depolarization to
the start of ventricular depolarization, primarily reflecting conduction through the AV
,node. The SA node initiates the impulse but does not influence PR interval duration.
Prolonged PR intervals are a hallmark of first-degree AV block.
Question 2 of 50
A patient with pneumonia has decreased breath sounds on the right side. A chest X-ray
reveals consolidation in the lower lobe. The nurse understands that consolidation
impairs gas exchange primarily by affecting which structure?
A. Bronchioles
B. Trachea
C. Alveoli ✓ CORRECT
D. Larynx
Correct Answer: C
Rationale: Consolidation occurs when alveoli fill with fluid or pus, reducing the surface
area available for oxygen and carbon dioxide diffusion. The bronchioles and trachea are
airways that conduct air but do not participate in gas exchange. Pneumonia directly
compromises the respiratory membrane within the alveoli.
Question 3 of 50
A patient with chronic pancreatitis is malnourished despite adequate oral intake. The
healthcare provider explains that the pancreas normally secretes enzymes into the
duodenum to break down nutrients. Which enzyme is responsible for breaking down
fats?
A. Amylase
B. Pepsin
C. Trypsin
D. Lipase ✓ CORRECT
Correct Answer: D
, Rationale: Pancreatic lipase hydrolyzes triglycerides into fatty acids and glycerol for
absorption in the small intestine. Amylase breaks down carbohydrates, pepsin is a
gastric enzyme for proteins, and trypsin is a pancreatic protease. Fat malabsorption in
pancreatitis leads to steatorrhea and weight loss.
Question 4 of 50
A patient accidentally touches a hot stove and immediately pulls their hand away before
feeling pain. This reflex arc bypasses the brain and involves which type of neuron
carrying the signal directly to the spinal cord?
A. Sensory neuron ✓ CORRECT
B. Motor neuron
C. Interneuron
D. Association neuron
Correct Answer: A
Rationale: Sensory neurons transmit afferent signals from peripheral receptors to the
central nervous system, allowing rapid reflex responses at the spinal cord level. Motor
neurons carry efferent commands to muscles, while interneurons process signals within
the CNS. The withdrawal reflex depends on sensory input triggering an immediate
motor output.
Question 5 of 50
A patient with type 1 diabetes has a fasting blood glucose of 280 mg/dL. The nurse
understands that in a healthy individual, which hormone lowers blood glucose by
promoting cellular uptake?
A. Glucagon
B. Insulin ✓ CORRECT
C. Cortisol
D. Epinephrine
Complete Questions and Answers Detailed Rationales
Graded A+ Pass Guaranteed - A+ Graded
TABLE OF CONTENTS
Section 1 | Human Anatomy & Physiology | Q1 – Q18
Section 2 | Biology (Micro, Genetics, Cellular) | Q19 – Q28
Section 3 | Chemistry | Q29 – Q36
Section 4 | Scientific Reasoning & Measurement | Q37 – Q44
Section 5 | Scientific Method & Data Interpretation | Q45 – Q50
Instructions: Choose the single best answer. Pass: 80% in 60 minutes.
══════════════════════════════════════
SECTION 1: HUMAN ANATOMY & PHYSIOLOGY Q1 – Q18
══════════════════════════════════════
Question 1 of 50
A 68-year-old patient with hypertension presents with fatigue and shortness of breath.
An ECG shows prolonged PR intervals. The nurse understands this indicates delayed
conduction through which structure?
A. Sinoatrial node
B. Atrioventricular node ✓ CORRECT
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
Rationale: The PR interval on an ECG represents the time from atrial depolarization to
the start of ventricular depolarization, primarily reflecting conduction through the AV
,node. The SA node initiates the impulse but does not influence PR interval duration.
Prolonged PR intervals are a hallmark of first-degree AV block.
Question 2 of 50
A patient with pneumonia has decreased breath sounds on the right side. A chest X-ray
reveals consolidation in the lower lobe. The nurse understands that consolidation
impairs gas exchange primarily by affecting which structure?
A. Bronchioles
B. Trachea
C. Alveoli ✓ CORRECT
D. Larynx
Correct Answer: C
Rationale: Consolidation occurs when alveoli fill with fluid or pus, reducing the surface
area available for oxygen and carbon dioxide diffusion. The bronchioles and trachea are
airways that conduct air but do not participate in gas exchange. Pneumonia directly
compromises the respiratory membrane within the alveoli.
Question 3 of 50
A patient with chronic pancreatitis is malnourished despite adequate oral intake. The
healthcare provider explains that the pancreas normally secretes enzymes into the
duodenum to break down nutrients. Which enzyme is responsible for breaking down
fats?
A. Amylase
B. Pepsin
C. Trypsin
D. Lipase ✓ CORRECT
Correct Answer: D
, Rationale: Pancreatic lipase hydrolyzes triglycerides into fatty acids and glycerol for
absorption in the small intestine. Amylase breaks down carbohydrates, pepsin is a
gastric enzyme for proteins, and trypsin is a pancreatic protease. Fat malabsorption in
pancreatitis leads to steatorrhea and weight loss.
Question 4 of 50
A patient accidentally touches a hot stove and immediately pulls their hand away before
feeling pain. This reflex arc bypasses the brain and involves which type of neuron
carrying the signal directly to the spinal cord?
A. Sensory neuron ✓ CORRECT
B. Motor neuron
C. Interneuron
D. Association neuron
Correct Answer: A
Rationale: Sensory neurons transmit afferent signals from peripheral receptors to the
central nervous system, allowing rapid reflex responses at the spinal cord level. Motor
neurons carry efferent commands to muscles, while interneurons process signals within
the CNS. The withdrawal reflex depends on sensory input triggering an immediate
motor output.
Question 5 of 50
A patient with type 1 diabetes has a fasting blood glucose of 280 mg/dL. The nurse
understands that in a healthy individual, which hormone lowers blood glucose by
promoting cellular uptake?
A. Glucagon
B. Insulin ✓ CORRECT
C. Cortisol
D. Epinephrine
