Heart Quiz

A  circumflex artery.

B  posterior interventricular artery.

C  great cardiac vein.

D  right marginal artery.

E  anterior interventricular artery.

A  Potassium is entering atrial cells and sodium is leaving ventricular cells.

B  Calcium is entering and potassium is leaving ventricular cells.

C  Sodium is rapidly diffusing out of atrial muscle cells.

D  Sodium channels are beginning to open in ventricular cells and calcium is entering through slow channels in atrial cells.

A  4

B  3

C  6

D  2

A  capillary.

B  vein.

C  artery.

A  Right atrium and left atrium

B  Right atrium and left ventricle

C  Left atrium and left ventricle

D  Left atrium and right ventricle

E  Right atrium and right ventricle

A  from the Golgi apparatus of the cell.

B  from the sarcoplasmic reticulum of the cell.

C  into the cell through leakage channels in the sarcolemma.

D  into the cell through voltage-gated channels in the sarcolemma.

A  Cardiac muscle cell

B  Skeletal muscle cell

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  positive chronotropic agent.

B  positive inotropic agent.

C  negative chronotropic agent.

D  negative inotropic agent.

A  binding of ACh to ACh receptor.

B  exit of potassium through voltage-gated channels.

C  entrance of sodium through voltage-gated channels.

D  entrance of calcium through voltage-gated channels.

E  simultaneous closure of sodium channels and opening of calcium channels.

A  An increase in afterload

B  An increase in heart rate

C  Addition of positive inotropic agents

D  An increase in venous return

A  visceral layer of the serosal pericardium.

B  myocardium.

C  external layer of the fibrous pericardium.

D  mediastinum.

E  parietal layer of the serosal pericardium.

A  pericardial cavity.

B  pericardium.

C  endocardium.

D  pectinate muscle.

E  myocardium.

A  TRUE

B  FALSE