Anatomy and Physiology Semester Test

Which ion allows hemoglobin to readily bind with oxygen?

• Fe2+

• Na+

• K+

• Ca2+

Which of the following statements about mature red blood cells is NOT true?

• Life span around 120 days

• Contains hemoglobin

• No nuclei

• Divide to make new cells when old ones need to be replaced

If your blood type is O-neg that means...?

• you have no agglutinogens on your red blood cells.

• you have the rhesus antigens

• you only have anti-A antibodies in your blood plasma

• all of the above

Which of the following is true for both cardiac and skeletal muscle tissues?

• Striated

• Contract as a unit

• Branched

• Can spontaneously depolarize without input from the nervous system

Which statement below correctly matches the structure with its function?

• Veins carry blood away from the heart

• The atria are the high pressure receiving chambers of the heart

• The sinoatrial node initiates the action potential that causes the heart to beat

• Contractile cardiac muscle cells can trigger their own aciton potentials without neutral input

The _____ side of the heart is the _______ circuit and pumps the oxygen-rich blood to the _____?

• Right; systemic; lungs

• Left; systemic; body

• Right; pulmonary; lungs

• Left; pulmonary; body

The _____ side of the heart is the _______ circuit and pumps oxygen-poor blood to the _____?

• Right; systemic; lungs

• Left; systemic; body

• Right; pulmonary; lungs

• Left; pulmonary; body

The purpose of the serous fluid in the pericardial cavity is?

• to carry critical nutrients like oxygen to the heart

• to provide Ca2= ions needed for muscle contraction

• to decrease friction between the layers of the heart as it contracts

• to lubricate the walls of the blood vessels to decrease resistance to blood flow

Which of the following accurately reflects the order of events that causes the heart to pump out blood?

• Electrical event -> distribution -> mechanical event -> pressure change -> fluid movements

• Electrical event -> pressure change -> mechanical event -> distribution -> fluid movements

• Mechanical event -> distribution -> electrical event -> pressure change -> fluid movements

• Mechanical event -> pressure change -> electrical event -> distribution -> fluid movement

Which of the following statements about the valves of the heart is FALSE?

• The tricuspid valve is the semilunar valve on the right side of the heart.

• The aortic valve prevents backflow into the left ventricle.

• The mitral valve has two cusps between the left atrium and left ventricle

• The pulmonary valve guards the base of the pulmonary trunk.