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Bio 181 ASU Exam 3
Practice Question Bank
Comprehensive Review with 58 Questions, Answers & Rationales
BIO 181 — General Biology I
Edition 1 · August 2026
,Table of Contents
1. Instructions for Use 2
2. Practice Questions with Answers & Rationales 2
BIO 181 · Arizona State University Page 1
, BIO 181 ASU EXAM 3 PRACTICE GUIDE NEUROBIOLOGY, CARDIOVASCULAR & RENAL SYSTEMS
How to Use This Guide
Read each stem, choose your answer, then check the rationale below. The correct option is marked, and each wrong option
is explained. This guide contains 58 questions covering the full scope of the Bio 181 ASU Exam 3.
Category: Bio 181 ASU — Exam 3
1 T or F: Potassium ions are at high concentrations inside of cells, including neurons.
A True
B False
Why A is correct: Potassium ions (K+) are at high concentrations inside cells, including neurons, maintained by the
Na⁺/K⁺ ATPase pump.
B — This is a correct statement.
2 The action potential is a result of:
A the movement of ions
B protein synthesis
C DNA replication
D ATP production
Why A is correct: The action potential is caused by the movement of ions (Na⁺ and K⁺) across the neuron membrane
through ion channels.
B — Protein synthesis is not directly involved.
C — DNA replication is not involved.
D — ATP production is not the direct cause.
Bio 181 ASU Exam 3
Practice Question Bank
Comprehensive Review with 58 Questions, Answers & Rationales
BIO 181 — General Biology I
Edition 1 · August 2026
,Table of Contents
1. Instructions for Use 2
2. Practice Questions with Answers & Rationales 2
BIO 181 · Arizona State University Page 1
, BIO 181 ASU EXAM 3 PRACTICE GUIDE NEUROBIOLOGY, CARDIOVASCULAR & RENAL SYSTEMS
How to Use This Guide
Read each stem, choose your answer, then check the rationale below. The correct option is marked, and each wrong option
is explained. This guide contains 58 questions covering the full scope of the Bio 181 ASU Exam 3.
Category: Bio 181 ASU — Exam 3
1 T or F: Potassium ions are at high concentrations inside of cells, including neurons.
A True
B False
Why A is correct: Potassium ions (K+) are at high concentrations inside cells, including neurons, maintained by the
Na⁺/K⁺ ATPase pump.
B — This is a correct statement.
2 The action potential is a result of:
A the movement of ions
B protein synthesis
C DNA replication
D ATP production
Why A is correct: The action potential is caused by the movement of ions (Na⁺ and K⁺) across the neuron membrane
through ion channels.
B — Protein synthesis is not directly involved.
C — DNA replication is not involved.
D — ATP production is not the direct cause.
