BIOS 255 Exam 2 Study Guide 2025: Comprehensive A&P Practice Questions

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EXAM 2 COMPREHENSIVE EXAM & LAB PRACTICUM:

BIOS255 / BIOS 255 ANATOMY & PHYSIOLOGY III

WITH LAB (LATEST 2025 UPDATES STUDY BUNDLE

WITH COMPLETE SOLUTIONS) | 100% CORRECT |

GRADE A - CHAMBERLAIN

Valves ensure______ .....ANSWER.....One-way flow of blood

through the heart

Right AV valve has____ .....ANSWER.....three cusps (TRIcuspid

valve)

Left AV valve has____ .....ANSWER.....two cusps (BIcuspid)

Left AV valve also called .....ANSWER.....biscupid valve or mitral

valve

Right AV valve also called .....ANSWER.....Tricuspid valve

Cardiac Output (CO) .....ANSWER.....The amount of blood

ejected by each ventricle in 1 minute

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Exercise makes the heart____ .....ANSWER.....work harder which

increases cardiac output

At the beginning of exercise______in the muscles & joints send

signals to the cardiac centers .....ANSWER.....proprioceptors

Sympathetic output from the cardiac centers then _____ cardiac

output .....ANSWER.....increases

As exercise progresses, muscular activity ______ venous return

.....ANSWER.....increases

The preload increases on the right ventricle and then the left

ventricle as more blood flows through the _______

.....ANSWER.....Pulmonary circuit and reaches the left heart

Sustained exercise causes .....ANSWER.....hypertrophy

Blood vessels further from the heart .....ANSWER.....lowest BP

Blood vessels closest to heart .....ANSWER.....highest BP

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Tunica Interna (Tunica) .....ANSWER.....Innermost; consists of a

layer of simple squamous epithelium called endothelium.

Bound to a supendothelial layer of areolar connective tissue

Tunica Media .....ANSWER.....Middle; consists primarily of smooth

muscle with a framework of elastic connective tissue and contains

collagen.

Thickest layer

Tunica Externa (Adventitia) .....ANSWER.....Outermost; consists of

areolar connective tissue with elastice and collagen fibers

Capillaries only consist of______and______

.....ANSWER.....Basement membrane; endothelium layer

Veins and venules are the only blood vessels that contain

.....ANSWER.....Valves to prevent back flow

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Tunica media will be thicker in arteries than veins because

.....ANSWER.....They will need to supply more pressure to the

blood

Smallest artery is an .....ANSWER.....Arteriole

Smallest vein is a .....ANSWER.....Venule

Elastic arteries .....ANSWER.....Tunica media composed of smooth

muscle and elastic connective tissue

Largest of arteries

Found closest to the heart

Elastic needed to withstand blood being ejected from heart

Muscular Arteries .....ANSWER.....Tunica media composed of

smooth muscle

Second largest artery

Found far from heart