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Exam 2 - BI208
Terms in this set (48)
Release from the adrenal gland promotes vasoconstriction
The release of Renin from the kidneys results in the production of this molecule in the lungs
Also called vasopressin, this molecule stimulates the kidneys to conserve water
Lymphoid tissue where cells of the immune system originate
Lymphoid tissue where T-cells mature
Lymphoid tissue where erythrocytes are recycled
Lymphoid tissue where erthyrocytes originate
Vessels that the lympahatic ducts drain into
Blood vessels where immune cells can leave or enter the cardiovascular system
Post capillary venules
Vessels that train excess fluid from tissues
have the thickest tunica media relative to lumen size
Major role in dampening the pulsatile pressure of heart contractions
Vasodialation or constriction of these vessels determines blood flow to individual capillary beds
This organ cleans lymph
This organ stores monocytes and platelets (thrombocytes)
This tissue is present within mucosal membranes to prevent pathogen entry into the circulation
These phagocytes 'present' antigens to T and B cells
These cells release histamines histamines to promote vasodialation
These cells specifically kill viruses and cancer cells
Natural killer cells
These cells can produce antibodies when stimulated with antigen
These cells phagocytize foreign substances
These cells 'manage' the immune system
Suppose that vasoconstriction decreases the diameter of the vessel to one-half of its size. What happens to the rate of flow through that vessel ?
The blood flow decreases to one-sixteenth of the original flow
In which of the following is the total combined cross-sectional surface area of these vessels the greatest?
In which of the following is the velocity of blood flow the slowest?
What happens to the mean arterial pressure (MAP) in the carotid artery immediately upon standing up?
the MAP decreases
What is the response of the circulatory system in response to standing up?
- increase in heart rate
- increase in heart contractility
- vasoconstriction of the carotid artery
(all of the above)
The largest diameter lymphatic vessels are
Lymph nodes are densely clustered in all of the following body areas EXCEPT
The lymphoid organ that functions primarily during youth and then begins to reduce in size during adulthood is the
Which of the following would NOT result in the dialation of terminal arterioles upstream of the capillary beds
A local increase in histamine
total peripheral resistance
is inversely related to the diameter of the arterioles
A significant increase in capillary hydrostatic pressure
- accelerates fluid loss from the blood
- can result in abnormal increase of interstitial fluid
- can often be seen in a condition called edema
(all of the above answers are correct)
Which of the following statements does not accurately describe veins?
Always carry deoxygenated blood
The baroreceptors in the carotid sinus and aortic arch are sensitive to
changes in arterial pressure
Net Filtration Pressure
(Hpc+ OPif) - (HPif +OPc) = NFP
net fluid flow is into the capillaries
net fluid flow is out of the capillaries
Where within the capillary bed would you expect to find the pressures listed in 36 (Negative number)
What is the benefit of having fewer efferent than afferent lymphatics on lymph nodes?
There is more time for cleansing because of the slower flow through the lymph nodes
As blood flows through the circulatory system, in which vessel type does the blood movement slowest?
Capillaries have the slowest blood flow for fluid exchange
As blood flows through the circulatory system, which type of vessel is the first to experience no difference in pressure between systole and diastole (no pulse pressure) under normal conditions?
Write an equation showing the correct relationship between total peripheral resistance, blood flow, and blood pressure?
F = P/R
Explain how hypertension makes it harder for the heart to pump blood. In your answer you must include a description of the portion of the cardiac cycle most affected by the hypertension
What is neurocardiogenic syncope (NCS)
A disorder of the autonomic nervous system that results in fainting due to the low blood pressure when standing because blood flows to lower extremities
In the situation described above, the cardioacceleratory center of the brain will be _______ to restore the systemic blood pressure
In the situation described above, the vasomotor center of the brain will be stimulated to promote ___________ of the arteries
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