BIOL 355 ECOLOGY FINAL
EXAM QUESTIONS AND
ANSWERS (DR. LARSON) |
SPRING 2026 WITH
COMPLETE ANSWERS
ACROSS ALL MODULES
Preparing for BIOL 355 requires focusing on core physiological concepts,
disease processes, pharmacology basics, and clinical manifestations.
Medical-surgical nursing and pathophysiology textbooks, such as those by
Linda Stanhope, Jacquelyn Banasik, and Joyce LeMone, emphasize critical
clinical patterns. Below is a comprehensive guide featuring high-yield review
questions and direct answers structured to support thorough exam
preparation.
1.Cardiovascular System
Question: What is the primary pathophysiological mechanism of a first-
degree heart block? Answer: A conduction delay that prolongs the PR interval
without dropping any beats.
Question: Which type of heart block involves periodically dropped ventricular
contractions due to a longer electrical delay at the AV node? Answer:
Second-degree heart block
Question: What is the defining characteristic of third-degree (total) heart
block? Answer: Complete absence of impulse transmission from the atria to
,the ventricles, causing the ventricles to beat independently at 30–45 beats
per minute.
Question: What is a major complication associated with third-degree heart
block? Answer: Cardiac arrest, syncope, and sudden cardiac death.
Question: What are the typical manifestations of second-degree heart block?
Answer: Mild symptoms such as fatigue, chest pain, shortness of breath,
nausea, and a dropped QRS complex.
Question: What heart block type typically requires no treatment and presents
with no symptoms other than a prolonged PR interval? Answer: First-degree
heart block.
Question: What is the underlying patho of heart blocks? Answer: Electrical
conduction is excessively delayed or stopped at the AV node or Bundle of
His.
Question: How does third-degree heart block affect cardiac output? Answer:
Cardiac output is greatly reduced.
Question: What is the intrinsic ventricular escape rate in complete heart
block? Answer: 30 to 45 beats per minute.
Question: What is a primary treatment intervention for symptomatic second
or third-degree heart blocks? Answer: Insertion of a pacemaker (and
potential defibrillation for third-degree emergencies).
2.Pulmonary and Respiratory Disorders
Question: A 27-year-old male presents with sudden chest pain at rest,
increased pain on inhalation, respiratory distress, hypotension, and
tachycardia. What progressive condition is suspected? Answer: Tension
pneumothorax.
Question: What is the most appropriate initial diagnostic test and nursing
diagnosis for a patient developing a tension pneumothorax? Answer: Chest
X-ray, Ineffective airway clearance r/t Tension Pneumothorax.
Question: Why is an EKG incorrect for diagnosing a simple muscle strain or
tension pneumothorax? Answer: Because an EKG measures electrical activity
of the heart and does not evaluate lung tissue collapse or musculoskeletal
strain.
, Question: What physical finding differentiates a tension pneumothorax from
a closed pneumothorax? Answer: Vascular impairment, severe hemodynamic
instability, and potential shock.
Question: What breath sounds are typically absent or diminished on the
affected side of a pneumothorax? Answer: Vesicular breath sounds.
Question: What immediate emergency intervention is required for a tension
pneumothorax before chest tube placement? Answer: Needle
decompression.
Question: What acid-base imbalance is initially risked during severe
hyperventilation or early respiratory distress? Answer: Respiratory alkalosis.
Question: What is the primary goal of applying negative pressure via a chest
drainage system? Answer: To re-expand the collapsed lung and restore
intrapleural negative pressure.
Question: What term describes air entering the pleural space during
inspiration through a chest wall wound? Answer: Open pneumothorax.
Question: What is a spontaneous pneumothorax primarily caused by?
Answer: The rupture of a subpleural bleb.
3. Renal and Urinary Systems
Question: A 60-year-old male presents with blurred vision and hematuria.
The medical team suspects nephrosclerosis. What chronic condition is
expected in his medical history? Answer: Hypertension.
Question: How does chronic hypertension lead to nephrosclerosis? Answer:
High blood pressure causes renal arterioles to harden, thicken, and narrow
over time, reducing blood flow and damaging tissue.
Question: Why is urolithiasis (kidney stones) an incorrect cause of
nephrosclerosis? Answer: Urolithiasis causes obstruction and localized colic,
not diffuse vascular hardening of the kidneys.
Question: What is renal agenesis? Answer: A developmental failure of one or
both kidneys to form, which is often asymptomatic if unilateral.
Question: What is cystitis? Answer: An inflammation or infection of the
urinary bladder.
EXAM QUESTIONS AND
ANSWERS (DR. LARSON) |
SPRING 2026 WITH
COMPLETE ANSWERS
ACROSS ALL MODULES
Preparing for BIOL 355 requires focusing on core physiological concepts,
disease processes, pharmacology basics, and clinical manifestations.
Medical-surgical nursing and pathophysiology textbooks, such as those by
Linda Stanhope, Jacquelyn Banasik, and Joyce LeMone, emphasize critical
clinical patterns. Below is a comprehensive guide featuring high-yield review
questions and direct answers structured to support thorough exam
preparation.
1.Cardiovascular System
Question: What is the primary pathophysiological mechanism of a first-
degree heart block? Answer: A conduction delay that prolongs the PR interval
without dropping any beats.
Question: Which type of heart block involves periodically dropped ventricular
contractions due to a longer electrical delay at the AV node? Answer:
Second-degree heart block
Question: What is the defining characteristic of third-degree (total) heart
block? Answer: Complete absence of impulse transmission from the atria to
,the ventricles, causing the ventricles to beat independently at 30–45 beats
per minute.
Question: What is a major complication associated with third-degree heart
block? Answer: Cardiac arrest, syncope, and sudden cardiac death.
Question: What are the typical manifestations of second-degree heart block?
Answer: Mild symptoms such as fatigue, chest pain, shortness of breath,
nausea, and a dropped QRS complex.
Question: What heart block type typically requires no treatment and presents
with no symptoms other than a prolonged PR interval? Answer: First-degree
heart block.
Question: What is the underlying patho of heart blocks? Answer: Electrical
conduction is excessively delayed or stopped at the AV node or Bundle of
His.
Question: How does third-degree heart block affect cardiac output? Answer:
Cardiac output is greatly reduced.
Question: What is the intrinsic ventricular escape rate in complete heart
block? Answer: 30 to 45 beats per minute.
Question: What is a primary treatment intervention for symptomatic second
or third-degree heart blocks? Answer: Insertion of a pacemaker (and
potential defibrillation for third-degree emergencies).
2.Pulmonary and Respiratory Disorders
Question: A 27-year-old male presents with sudden chest pain at rest,
increased pain on inhalation, respiratory distress, hypotension, and
tachycardia. What progressive condition is suspected? Answer: Tension
pneumothorax.
Question: What is the most appropriate initial diagnostic test and nursing
diagnosis for a patient developing a tension pneumothorax? Answer: Chest
X-ray, Ineffective airway clearance r/t Tension Pneumothorax.
Question: Why is an EKG incorrect for diagnosing a simple muscle strain or
tension pneumothorax? Answer: Because an EKG measures electrical activity
of the heart and does not evaluate lung tissue collapse or musculoskeletal
strain.
, Question: What physical finding differentiates a tension pneumothorax from
a closed pneumothorax? Answer: Vascular impairment, severe hemodynamic
instability, and potential shock.
Question: What breath sounds are typically absent or diminished on the
affected side of a pneumothorax? Answer: Vesicular breath sounds.
Question: What immediate emergency intervention is required for a tension
pneumothorax before chest tube placement? Answer: Needle
decompression.
Question: What acid-base imbalance is initially risked during severe
hyperventilation or early respiratory distress? Answer: Respiratory alkalosis.
Question: What is the primary goal of applying negative pressure via a chest
drainage system? Answer: To re-expand the collapsed lung and restore
intrapleural negative pressure.
Question: What term describes air entering the pleural space during
inspiration through a chest wall wound? Answer: Open pneumothorax.
Question: What is a spontaneous pneumothorax primarily caused by?
Answer: The rupture of a subpleural bleb.
3. Renal and Urinary Systems
Question: A 60-year-old male presents with blurred vision and hematuria.
The medical team suspects nephrosclerosis. What chronic condition is
expected in his medical history? Answer: Hypertension.
Question: How does chronic hypertension lead to nephrosclerosis? Answer:
High blood pressure causes renal arterioles to harden, thicken, and narrow
over time, reducing blood flow and damaging tissue.
Question: Why is urolithiasis (kidney stones) an incorrect cause of
nephrosclerosis? Answer: Urolithiasis causes obstruction and localized colic,
not diffuse vascular hardening of the kidneys.
Question: What is renal agenesis? Answer: A developmental failure of one or
both kidneys to form, which is often asymptomatic if unilateral.
Question: What is cystitis? Answer: An inflammation or infection of the
urinary bladder.
