Heart Quiz

A  anterior interventricular artery.

B  posterior interventricular artery.

C  circumflex artery.

D  right marginal artery.

E  great cardiac vein.

A  Calcium is entering and potassium is leaving ventricular cells.

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

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

D  Sodium is rapidly diffusing out of atrial muscle cells.

A  3

B  6

C  2

D  4

A  capillary.

B  artery.

C  vein.

A  Left atrium and left ventricle

B  Right atrium and right ventricle

C  Left atrium and right ventricle

D  Right atrium and left ventricle

E  Right atrium and left atrium

A  from the sarcoplasmic reticulum of the cell.

B  into the cell through leakage channels in the sarcolemma.

C  from the Golgi apparatus of the cell.

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

A  Skeletal muscle cell

B  Cardiac muscle cell

A  TRUE

B  FALSE

A  TRUE

B  FALSE

A  negative chronotropic agent.

B  positive inotropic agent.

C  negative inotropic agent.

D  positive chronotropic agent.

A  exit of potassium through voltage-gated channels.

B  entrance of sodium through voltage-gated channels.

C  entrance of calcium through voltage-gated channels.

D  binding of ACh to ACh receptor.

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

A  An increase in venous return

B  An increase in afterload

C  An increase in heart rate

D  Addition of positive inotropic agents

A  external layer of the fibrous pericardium.

B  parietal layer of the serosal pericardium.

C  myocardium.

D  visceral layer of the serosal pericardium.

E  mediastinum.

A  pectinate muscle.

B  pericardium.

C  myocardium.

D  pericardial cavity.

E  endocardium.

A  FALSE

B  TRUE