BIOS 255 Exam 2 Questions With 100% Correct Answers
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Course
Bio 255
Institution
Bio 255
BIOS 255 Exam 2 Questions With 100% Correct Answers
Valves ensure______
One-way flow of blood through the heart
Right AV valve has____
three cusps (TRIcuspid valve)
Left AV valve has____
two cusps (BIcuspid)
Left AV valve also called
biscupid valve or mitral valve
Right AV ...
BIOS 255 Exam 2 Questions With 100%
Correct Answers
Valves ensure______
One-way flow of blood through the heart
Right AV valve has____
three cusps (TRIcuspid valve)
Left AV valve has____
two cusps (BIcuspid)
Left AV valve also called
biscupid valve or mitral valve
Right AV valve also called
Tricuspid valve
Cardiac Output (CO)
The amount of blood ejected by each ventricle in 1 minute
Exercise makes the heart____
work harder which increases cardiac output
At the beginning of exercise______in the muscles & joints send signals to the cardiac centers
proprioceptors
Sympathetic output from the cardiac centers then _____ cardiac output
increases
As exercise progresses, muscular activity ______ venous return
increases
The preload increases on the right ventricle and then the left ventricle as more blood flows through
the _______
Pulmonary circuit and reaches the left heart
Sustained exercise causes
hypertrophy
Blood vessels further from the heart
lowest BP
Blood vessels closest to heart
, highest BP
Tunica Interna (Tunica)
Innermost; consists of a layer of simple squamous epithelium called endothelium.
Bound to a supendothelial layer of areolar connective tissue
Tunica Media
Middle; consists primarily of smooth muscle with a framework of elastic connective tissue and
contains collagen.
Thickest layer
Tunica Externa (Adventitia)
Outermost; consists of areolar connective tissue with elastice and collagen fibers
Capillaries only consist of______and______
Basement membrane; endothelium layer
Veins and venules are the only blood vessels that contain
Valves to prevent back flow
Tunica media will be thicker in arteries than veins because
They will need to supply more pressure to the blood
Smallest artery is an
Arteriole
Smallest vein is a
Venule
Elastic arteries
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
Tunica media composed of smooth muscle
Second largest artery
Found far from heart
Smooth muscle needed for vasoconstriction and vasodilation
Continuous Capillaries
Completely encricle a lumen, surrounded by a complete basement membrane
Found in skin and muscle
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