Bio 431 Unit 1 Review Exam
Questions and Answers
Where is the left atrium located? - ANSWER-The upper left chamber of the heart
above the left ventricle
Where is the right ventricle located? - ANSWER-The bottom right chamber of the
heart below the right atrium
Where is the left ventricle located? - ANSWER-The bottom left chamber of the heart
below the left atrium
What is the function of the right atrium? - ANSWER-Receives deoxygenated blood
from the body from the systemic circulation via the superior and inferior vena cava
What is the function of the left atrium? - ANSWER-It receives oxygenated blood from
the lungs via the pulmonary arteries
What is the function of the right ventricle? - ANSWER-Pumps blood into the
pulmonary trunk to the lungs (right or left)
What is the function of the left ventricle? - ANSWER-It pumps oxygenated blood into
the aorta, then around the body via the systemic circulation
What muscles are found in the right atrium? - ANSWER-Pectinate muscles
What muscles are found in the right ventricle? - ANSWER-Papillary muscles
What muscles are found in the left ventricle? - ANSWER-Papillary muscles
Why is there a difference in the size of the chambers? - ANSWER-The difference in
size of the chambers is due to the chambers' function:
-atria: they are small, thin-walled chambers that only contract minimally to push
blood downwards into the ventricles
-ventricles: they are the actual pumps of the heart -->
~left ventricle is thicker and ejects blood into the aorta, which is then sent to the rest
of the body's systems
~right ventricle: only pumps blood into the pulmonary trunk, which then pumps into
the lungs
What are the names of the 4 heart valves? - ANSWER--tricuspid valve
-bicuspid valve
-pulmonary semi-lunar valve
, -aortic semi-lunar valve
Where is the tricuspid valve located? - ANSWER-between right atrium and right
ventricle
Where is the bicuspid valve located? - ANSWER-between left atrium and left
ventricle
Where is the pulmonary semilunar valve located? - ANSWER-between right ventricle
and pulmonary trunk
Where is the aortic semilunar valve located? - ANSWER-between left ventricle and
aorta
What is the function of the tricuspid valve? - ANSWER-permits blood flow only one
way, from the right atrium to the right ventricle, and also prevents backflow of blood
into the right atrium
What is the function of the bicuspid valve? - ANSWER-permits blood to flow one way
only, from the left atrium into the left ventricle, and prevents backflow of blood into
the left atrium
What is the function of the pulmonary semilunar valve? - ANSWER-Guards the base
of the pulmonary trunk from the right ventricle and prevents backflow of blood into
the right ventricle
What is the function of the aortic semilunar valve? - ANSWER-Guards the base of
the aorta from the left ventricle and prevents the backflow of blood into the left
ventricle
What is the function of the pulmonary circulation? - ANSWER-It pumps
deoxygenated blood to the lungs
What is the function of the systemic circulation? - ANSWER-It pumps oxygenated
blood to the body's systems
What is the importance of coronary circulation? - ANSWER-It is responsible for
continuously nourishing the heart by taking the role as the heart's main functional
blood supply. It also has collateral routes that provide additional pathways for blood
delivery to the heart muscle
What are the major vessels involved in coronary circulation? - ANSWER-- Arterial
blood originates from the Aorta
-Small cardiac vein travels w/ the marginal artery
-Middle cardiac vein travels w/ the posterior interventricular artery
-Great cardiac vein travels w/ the anterior interventricular artery
-Venous blood drains into the coronary sinus, emptying into the right atrium
What structural characteristics make cardiac muscle cells unique? - ANSWER--self-
excitable
Questions and Answers
Where is the left atrium located? - ANSWER-The upper left chamber of the heart
above the left ventricle
Where is the right ventricle located? - ANSWER-The bottom right chamber of the
heart below the right atrium
Where is the left ventricle located? - ANSWER-The bottom left chamber of the heart
below the left atrium
What is the function of the right atrium? - ANSWER-Receives deoxygenated blood
from the body from the systemic circulation via the superior and inferior vena cava
What is the function of the left atrium? - ANSWER-It receives oxygenated blood from
the lungs via the pulmonary arteries
What is the function of the right ventricle? - ANSWER-Pumps blood into the
pulmonary trunk to the lungs (right or left)
What is the function of the left ventricle? - ANSWER-It pumps oxygenated blood into
the aorta, then around the body via the systemic circulation
What muscles are found in the right atrium? - ANSWER-Pectinate muscles
What muscles are found in the right ventricle? - ANSWER-Papillary muscles
What muscles are found in the left ventricle? - ANSWER-Papillary muscles
Why is there a difference in the size of the chambers? - ANSWER-The difference in
size of the chambers is due to the chambers' function:
-atria: they are small, thin-walled chambers that only contract minimally to push
blood downwards into the ventricles
-ventricles: they are the actual pumps of the heart -->
~left ventricle is thicker and ejects blood into the aorta, which is then sent to the rest
of the body's systems
~right ventricle: only pumps blood into the pulmonary trunk, which then pumps into
the lungs
What are the names of the 4 heart valves? - ANSWER--tricuspid valve
-bicuspid valve
-pulmonary semi-lunar valve
, -aortic semi-lunar valve
Where is the tricuspid valve located? - ANSWER-between right atrium and right
ventricle
Where is the bicuspid valve located? - ANSWER-between left atrium and left
ventricle
Where is the pulmonary semilunar valve located? - ANSWER-between right ventricle
and pulmonary trunk
Where is the aortic semilunar valve located? - ANSWER-between left ventricle and
aorta
What is the function of the tricuspid valve? - ANSWER-permits blood flow only one
way, from the right atrium to the right ventricle, and also prevents backflow of blood
into the right atrium
What is the function of the bicuspid valve? - ANSWER-permits blood to flow one way
only, from the left atrium into the left ventricle, and prevents backflow of blood into
the left atrium
What is the function of the pulmonary semilunar valve? - ANSWER-Guards the base
of the pulmonary trunk from the right ventricle and prevents backflow of blood into
the right ventricle
What is the function of the aortic semilunar valve? - ANSWER-Guards the base of
the aorta from the left ventricle and prevents the backflow of blood into the left
ventricle
What is the function of the pulmonary circulation? - ANSWER-It pumps
deoxygenated blood to the lungs
What is the function of the systemic circulation? - ANSWER-It pumps oxygenated
blood to the body's systems
What is the importance of coronary circulation? - ANSWER-It is responsible for
continuously nourishing the heart by taking the role as the heart's main functional
blood supply. It also has collateral routes that provide additional pathways for blood
delivery to the heart muscle
What are the major vessels involved in coronary circulation? - ANSWER-- Arterial
blood originates from the Aorta
-Small cardiac vein travels w/ the marginal artery
-Middle cardiac vein travels w/ the posterior interventricular artery
-Great cardiac vein travels w/ the anterior interventricular artery
-Venous blood drains into the coronary sinus, emptying into the right atrium
What structural characteristics make cardiac muscle cells unique? - ANSWER--self-
excitable
