BIO 252 MODULE 9 QUESTIONS & ANSWERS 2026-2027 | U… EXAM
P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
BIO 252 Module 9
Questions & Answers
2026-2027 | Updated
Exam Study Guide
Verified Answers Exam Ready With Rationales
72 QUESTIONS
DOCUMENT OVERVIEW
This document contains 72 questions with correct answers related to human biology,
providing clear explanations for each answer. It covers essential concepts within the
biological sciences, enabling students to deepen their understanding. This resource is ideal
for effective study, comprehensive review, and preparation for certification exams.
CONTENTS
Vascular Anatomy Q1–Q24
Blood Components Q25–Q43
Erythrocytes Q44–Q50
Leukocytes Q51–Q57
Platelets Q58–Q63
Page 1
,Circulation and Pulses Q64–Q72
E XA M Q U EST I O N S
Q1 QUESTION 1 OF 72
Artery
CORRECT ANSWER
Blood vessel that conducts blood away from the heart; may be a conducting or distributing
vessel.
Q2 QUESTION 2 OF 72
Lumen
CORRECT ANSWER
Interior of a tubular structure such as a blood vessel or a portion of the alimentary canal
through which blood, chyme, or other substances travel.
Q3 QUESTION 3 OF 72
Vein
CORRECT ANSWER
Blood vessel that conducts blood toward the heart.
Q4 QUESTION 4 OF 72
Formed elements
Page 2
, CORRECT ANSWER
The cellular components of blood, making up about 45% of its volume.
Q5 QUESTION 5 OF 72
Tunica intima
CORRECT ANSWER
The innermost layer made of simple squamous epithelium (endothelium) and areolar
connective tissue, providing a smooth surface to prevent blood clotting.
Q6 QUESTION 6 OF 72
Tunica media
CORRECT ANSWER
Consists of smooth muscle, varies in structure depending on the vessel type.
Essential for maintaining blood pressure in arteries, and allows for constriction and dilation but
is too thick for diffusion between tissues and blood.
Q7 QUESTION 7 OF 72
Tunica externa
CORRECT ANSWER
Made of areolar connective tissue with collagen and elastin fibers. Anchors vessels to
surrounding structures and prevents rupture in large arteries but is thinner in veins.
Q8 QUESTION 8 OF 72
Elastic arteries
Page 3
P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
BIO 252 Module 9
Questions & Answers
2026-2027 | Updated
Exam Study Guide
Verified Answers Exam Ready With Rationales
72 QUESTIONS
DOCUMENT OVERVIEW
This document contains 72 questions with correct answers related to human biology,
providing clear explanations for each answer. It covers essential concepts within the
biological sciences, enabling students to deepen their understanding. This resource is ideal
for effective study, comprehensive review, and preparation for certification exams.
CONTENTS
Vascular Anatomy Q1–Q24
Blood Components Q25–Q43
Erythrocytes Q44–Q50
Leukocytes Q51–Q57
Platelets Q58–Q63
Page 1
,Circulation and Pulses Q64–Q72
E XA M Q U EST I O N S
Q1 QUESTION 1 OF 72
Artery
CORRECT ANSWER
Blood vessel that conducts blood away from the heart; may be a conducting or distributing
vessel.
Q2 QUESTION 2 OF 72
Lumen
CORRECT ANSWER
Interior of a tubular structure such as a blood vessel or a portion of the alimentary canal
through which blood, chyme, or other substances travel.
Q3 QUESTION 3 OF 72
Vein
CORRECT ANSWER
Blood vessel that conducts blood toward the heart.
Q4 QUESTION 4 OF 72
Formed elements
Page 2
, CORRECT ANSWER
The cellular components of blood, making up about 45% of its volume.
Q5 QUESTION 5 OF 72
Tunica intima
CORRECT ANSWER
The innermost layer made of simple squamous epithelium (endothelium) and areolar
connective tissue, providing a smooth surface to prevent blood clotting.
Q6 QUESTION 6 OF 72
Tunica media
CORRECT ANSWER
Consists of smooth muscle, varies in structure depending on the vessel type.
Essential for maintaining blood pressure in arteries, and allows for constriction and dilation but
is too thick for diffusion between tissues and blood.
Q7 QUESTION 7 OF 72
Tunica externa
CORRECT ANSWER
Made of areolar connective tissue with collagen and elastin fibers. Anchors vessels to
surrounding structures and prevents rupture in large arteries but is thinner in veins.
Q8 QUESTION 8 OF 72
Elastic arteries
Page 3
