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Bio Unit 4 Test
Terms in this set (37)
The circulatory system can help regulate temperature in the body. If the body is overheated, its temperature can be lowered by:
increasing blood flow to the capillaries near the skin surface
The component making up the greatest proportion of whole blood is:
Choose the option that lists the formed elements of blood from most abundant to least abundant.
erythrocytes, platelets, white blood cells
Which of the following features of red blood cells allows for rapid gas exchange between the cell and body tissues?
a large surface area of the cell compared to its volume
Each hemoglobin molecule can carry ____ total oxygen molecules, with each one being attached to the iron ion of a _____ group.
most common white blood cell
second most common white blood cell
Which of the following components is NOT typically part of a blood clot?
white blood cells
If anemia is suspected, a lab technician would confirm this by looking at which type of formed element?
red blood cells
Select the correct statement regarding blood cell formation.
Red bone marrow is the main site of blood cell formation throughout adult life
When observing a dissected heart, it is easy to determine which is the right and left side by
noticing the thickness of the ventricle walls
The myocardium of the left ventricle is supplied with oxygenated blood mostly by the
anterior interventricular artery and the circumflex artery
Which lists the components of the heart's conduction system in the proper order? (SA = sinoatrial, AV = atrioventicular)
SA Node, AV node, AV bundle, bundle branches in interventricular septum, Purkinje fibers
In fetal circulation, oxygenated blood bypasses the lungs and passes directly from the right atrium to the left atrium via the:
Which blood vessel type has the thickest tunica media proportional to its diameter?
Which type of capillary has only small intercellular clefts between its endothelial cells and is the type found in most tissues (e.g. skeletal muscle)?
The hepatic portal vein
carries nutrient-rich blood to the liver
A thrombus (an abnormal blood clot) in the first major branch of the arch of the aorta would affect the flow of blood to the
right side of the head and neck and right arm
Lymphoid tissues, including lymphatic capillaries and vessels, are found in
nearly all tissues of the body
Lymph is returned to the circulatory system at the:
junction of the subclavian and internal jugular veins
The movement of lymph and systemic venous blood are both dependent on (choose all that apply):
one-way valves, skeletal muscle contraction
Which cells produce plasma cells, which make antibodies?
B cells (B-lymphocytes)
Functions of the spleen include all of those below EXCEPT
site of maturation of t-cells
Which lymphatic organ lacks fully functioning white blood cells and therefore is not directly involved in the immune response?
Blood vessel formation occurs:
Most inspired particles such as dust fail to reach the lungs because of the
ciliated mucous lining in the nose
The larynx, trachea, and bronchi are all held open by structures made of:
In the respiratory system, most gas exchange occurs in the:
The walls of the alveoli are composed of two types of cells, type I and type II. The function of type II is
to secrete surfactant.
Which of the following is NOT found on the left lung?
The serous membrane that lines the thoracic wall and covers the superior diaphragm is the
Exhalation occurs when the thoracic cavity volume ________ and the intrapulmonary pressure __________.
Because the lungs are filled with fluid during fetal life, which of the following statements is true regarding fetal respiratory exchange?
Respiratory exchanges are made through the placenta.
As you inhale, air going to your trachea is more ___ than environmental air
warm and moist
Which of the following statements is true about veins?
The largest tunic in a vein is the tunica externa
Which structures in intercalated discs allow the heart muscle cells to contract together?
Coronary arteries arise from the
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