anatomy 2
The role of the atrioventricular node (av node) is to
Slow down impulses to that the atria can contract to fill the adjactent ventricles with blood
which of the following would experience increased blood flow
skin
What part of the lymphatic system is most closely associated with capillary beds
lymphatic cappilary
cardiogenic shock is most likely to result from
multiple heart attacks
fluids are likely to leave or filter out of the capillary if
net hydrostatic pressure (HP) is greater than net osposic pressure
In the fetus, blood from the left and right sides of the heart normally mix
true
the hepatic portal system collects blood from the ___ and then routes it to the ___
gi tract; liver
Reticular connective tissue is found in all lymphoid organs and tissues
false
if the net filtration (nfp) is positive, then fluid is reabsorbed to the blood
false
blood flows from the lungs to the ___ via the ____
left atrium; pulmonary veins
The most muscular chamber of the heart is the __________.
left ventricle
What is not a characteristic of lymph nodes
- Lymph nodes produce lymph.
Which of the following is true when comparing arteries an veins
Arteries carry blood away from the heart; veins carry blood to the heart
Blood flows directly from ___ into capillary beds
Arterioles
The P wave of an electrocardiogram represents __________.
Atrial depolarization
Baroreceptros are effective in a long turm regulation of blood pressure
false
Eptic focus
an abnormal pacemaler
Hypertension is defined physiologically as a condiction of sustained arterial pressure of ____ or higher
140/90
Correct order of lymph flow through the lymph node
Afferent vessel, subcapsular sinus, medullary sinuses, efferent vessel
What is true about the thymus?
After puberty the thymus begins to decrease in size
The second heart sound is because of the
Closure of the semilunar valves
How are lymphatic vessles different from veins
Collecting lymphatic vessles have more internal valves than do veins
The vessels that exhibit the lowest level of permeability are the
Continuous capillaries
What is not a function of lymphatic vessles?
Delivery of nurtients to tissues
Which of the following is not a role of the fibrous pericardium?
It facilitates heart contraction
Blood plasma and lymph are identical except for their respective locations in the body
False- lymph is more like interstitial fluid than plasma
The main role of the tonisls is to
Gather and remove pathogens entering through the pharynx
What would decrease in heart rate?
Parasympathetic stimulation
What is not a role of the spleen?
To serve as a site of t cell maturation
When would the capillary beds surrounding the gastrointestinal organs be open
When digesting a meal
Which of the following acts on the kidneys and blood vessles to raise blood pressure?
antidiuretic hormone
The superior chambers of the heart are called the __________.
atria
The lining of the heart chambers is called the:
epicardium
Blood flow would be increased by
increasing cardiac output
Into which chamber of the heart to the pulmonary veins deliver blood?
left atrium
Freshly oxygenated blood is delivered to the __ and then it passes into the ____ to be pumped to the body tissues (systematic circuit)
left atrium; left ventricle
What is not a part of the MATL
spleen
All lymph eventually returned to circulation via the
subcalvan veins
blood from the brain is returned to the heart via
superior vena cava
Which of the following is a difference between cardiac muscle and skeletal muscle
Unluke skeletal muscle, cardiac mscle cells can be autorythmic
Except for the ___ which is/are an endodermal derivative, the lymphoid organs develop from mesodermal mesenchymal cells
thymus
The vessel layer that has a direct role in vasoconstriction is the
tunica media