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BIO 335: The Heart Test- Questions with 100% Correct Answers
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BIO 335: The Heart Test- Questions with 100% Correct Answers
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BIO 335: The Heart Test- Questionswith 100% Correct Answers
The contraction phase of the heart is called ______. - Answer Systole
Firing of the SA nodes stimulates depolarization of the atria, producing the ______ in an
ECG. - Answer P wave
The relaxation phase of the heart is called ______. - Answer diastole
During atrial diastole the ventricles depolarize. This is seen on the ECG as the ______. -
Answer QRS complex
Atrial systole is initiated by the firing of the ______. - Answer sinoatrial node
The cardiac cycle is ______. - Answer a complete cycle of contraction and relaxation
The field that embraces the study of the heart, clinical evaluation and treatment
of disease is ______. - Answer cardiology
Blood is distributed to the body and returned to the heart via the ______ circuit. -
Answer systemic
The outer wall of the pericardium, the double-walled sac that encloses the heart,
is called the ______. - Answer Pericardial sac
, The tough outer layer of the pericardium is composed of ______. - Answer Connective
Tissue
The inner most layer of the wall of the heart is called the ______. - Answer Endocardium
The cardiovascular system is comprised of ______. - Answer Heart; Blood Vessels
Blood is carried to the lungs for gas exchange and returned to the heart by way of the
______ circuit. - Answer Pulmonary
The myocardium is composed mostly of ______. - Answer cardiac muscle
The endocardium consists predominately of ______. - Answer simple squamous
epithelium
The pericardial sac can best be described as ______. - Answer a double walled sac
composed of a fibrous and serous layer
What are the functions of the fibrous skeleton? - Answer -Anchors the cardiocytes
and give them something to pull against
-Provides structural support for the heart
-Provides electrical insulation between the atria and ventricles
deepest layer of the heart wall - Answer endocardium
middle layer of the heart wall - Answer myocardium
thickest, cardiac muscle
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