Structures and Functions Review

A patient experiences a sudden interruption in the blood supply to the brain. Which of the following most likely occured?

• Heart Attack

• Stroke

• Atherosclerosis

• Atrial Fibrillation

The absence of red blood cells would lead to which of the following:

• a weaker immune system/ability to fight of illness

• Excessive bleed - inability to form clots

• Lightheadedness - limited oxygen transport

• There is not enough information to tell.

What is the function of bicarbonate ions in digestion?

• Digests fats

• Digests proteins

• Neutralizes Chyme

• Stimulates absorption

What is the function of the Endocardium?

• keeping blood from sticking to the inside of the heart and forming potentially deadly blood clots.

• lubricates and protects the heart

• middle layer, contains cardiac muscle tissue

• makes up the majority of the thickness and mass of the heart wall

Which of the following is not a step of inhalation?

• Diaphragm contracts

• pressure increases in the chest activity to drive air in

• ribs move up and out

• chest cavity enlarges

What is the bodies first response to an increase in CO2?

• Stimulation of chemoreceptors

• Activation of medulla oblongata

• increase in breathing rate

• diaphragm contracts

How does the body respond to a decrease in blood sugar?

• The pancreas will release insulin

• The gallbladder will release bile

• The stomach will release pepsin

• The pancreas will release glucagon

Blood flowing from the left atrium to the left ventricle must flow through the

• tricuspid valve

• right atrioventricular valve

• mitral valve

• aortic semilunar valve

Which of the following would blood flow through while returning from the lungs?

• pulmonary artery

• pulmonary veins

• aorta

• superior vena cava

What causes the “Lub" sound of the heartbeat?

• tricuspid & bicuspid valves close

• pulmonary and aortic semi-lunar valves close

• Ventricles contract

• Ventricles relax