Quiz 3

A  FALSE

B  TRUE

A  4

B  3

C  6

D  2

E  1

A  entrance of calcium through voltage-gated channels.

B  binding of ACh to ACh receptor.

C  entrance of sodium through voltage-gated channels.

D  exit of potassium through voltage-gated channels.

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

A  FALSE

B  TRUE

A  Cardiac muscle cell

B  Skeletal muscle cell

A  negative inotropic agent.

B  positive chronotropic agent.

C  negative chronotropic agent.

D  positive inotropic agent.

A  artery.

B  vein.

C  capillary.

A  TRUE

B  FALSE

A  mediastinum.

B  external layer of the fibrous pericardium.

C  parietal layer of the serosal pericardium.

D  visceral layer of the serosal pericardium.

E  myocardium.

A  An increase in heart rate

B  An increase in venous return

C  An increase in afterload

D  Addition of positive inotropic agents

A  myocardium.

B  pectinate muscle.

C  endocardium.

D  pericardium.

E  pericardial cavity.

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

B  Calcium is entering and potassium is leaving ventricular cells.

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

D  Sodium is rapidly diffusing out of atrial muscle cells.

A  posterior interventricular artery.

B  right marginal artery.

C  great cardiac vein.

D  anterior interventricular artery.

E  circumflex artery.

A  from the sarcoplasmic reticulum of the cell.

B  into the cell through leakage channels in the sarcolemma.

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

D  from the Golgi apparatus of the cell.

A  Right atrium and left ventricle

B  Right atrium and right ventricle

C  Left atrium and right ventricle

D  Left atrium and left ventricle

E  Right atrium and left atrium