©BRAIBARTER 2024/2025 ALL RIGHTS RESERVED.
BIOS 255 Exam 2 Questions And Answers.
Updated And Verified.
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
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
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
1|Page
, ©BRAIBARTER 2024/2025 ALL RIGHTS RESERVED.
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
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
Smooth muscle needed for vasoconstriction and vasodilation
Continuous Capillaries - Answer✔Completely encricle a lumen, surrounded by a complete
basement membrane
Found in skin and muscle
Function of continuous capillaries - Answer✔Move small nutrients and waves through simple
diffusion such as gases
Fenestrated capillaries - Answer✔Contain fenestrations (Windows)
Found in small intestines and kidneys
Function of fenestrated capillaries - Answer✔These allow more capillary exchange and slightly
larger molecules to be absorbed into and filtered out of capillaries
Sinusoidal Capillaries - Answer✔Endothelial cells that do not completely encircle a lumen with
the basement membrane being incomplete or absent
Found in Liver, spleen, red bone marrow and some endocrine glands
Function of Sinusoidal capillaries - Answer✔These move large substances such as the formed
elements and plasma proteins
2|Page
BIOS 255 Exam 2 Questions And Answers.
Updated And Verified.
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
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
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
1|Page
, ©BRAIBARTER 2024/2025 ALL RIGHTS RESERVED.
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
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
Smooth muscle needed for vasoconstriction and vasodilation
Continuous Capillaries - Answer✔Completely encricle a lumen, surrounded by a complete
basement membrane
Found in skin and muscle
Function of continuous capillaries - Answer✔Move small nutrients and waves through simple
diffusion such as gases
Fenestrated capillaries - Answer✔Contain fenestrations (Windows)
Found in small intestines and kidneys
Function of fenestrated capillaries - Answer✔These allow more capillary exchange and slightly
larger molecules to be absorbed into and filtered out of capillaries
Sinusoidal Capillaries - Answer✔Endothelial cells that do not completely encircle a lumen with
the basement membrane being incomplete or absent
Found in Liver, spleen, red bone marrow and some endocrine glands
Function of Sinusoidal capillaries - Answer✔These move large substances such as the formed
elements and plasma proteins
2|Page
