Physiology — Practice Questions and Study Guide
The heart propels blood to and from most body tissues via TWO basic types of BLOOD VESSELS: - Correct answer- Arteries,
Veins
_______ are blood vessels that carry blood AWAY from the heart - Correct answer- Arteries
______ are blood vessels that carry blood BACK to the heart - Correct answer- Veins
3 classes of blood vessels:
Correct answer — 1. Capillaries 2. Arteries 3. Veins
ARTERIES become progressively ______ as they branch and finally result in ________
Correct answer — smaller, capillaries
VEINS become progressively _____ as they merge and are closer to the heart
Correct answer — larger
Both ARTERY and VEIN WALLS have 3 layers, called _____
Correct answer — Tunics
From outer to inner:
Correct answer — 1. Tunica externa (Adventitia) 2. Tunica media 3. Tunica intima (Interna)
TUNICA EXTERNA: 1. CT that helps anchor the ____ ____ to an organ 2. Larger blood vessels contain
____ ____ (Blood supply)
Correct answer — blood vessel, vasa vasorum
TUNICA MEDIA: 1. Comprised of _____ arranged SMOOTH muscle 2. Responsible for _____ and ____
Correct answer — circularly, vasoconstriction, vasodilation
SYMPATHETIC input = ____________
Correct answer — Vasoconstriction
PARASYMPATHETIC input = _______
1
, Correct answer — Vasodilation
TUNICA INTIMA: 1. Composed of ______ and a layer of ____ _____
Correct answer — Endothelium, connective tissue
Blood flow through the heart is _________ because of ____ valves within the heart
Correct answer — Unidirectional, 4
The heart is functionally 2 _____________ _____ that work at the SAME rate and pump the SAME
VOLUME of blood
Correct answer — side-by-side pumps
The RIGHT-SIDE pump directs blood to the ______
Correct answer — lungs
The LEFT-SIDE pump directs blood to the _____ ____
Correct answer — body tissues
The heart generates blood pressure through alternate cycles of the heart wall's _______ and ______
Correct answer — contraction, relaxation
Blood pressure is the force of the blood pushing against the inside walls of blood ______
Correct answer — vessels
A ______ blood pressure is essential to circulate blood throughout the body
Correct answer — minimum
Systolic (Top number), ventricle _______
Correct answer — Contracts
Diastolic (Bottom number), ventricle _______
Correct answer — relaxes
The cardiovascular system consists of 2 circulations:
2