A stethoscope can be used to evaluate intestinal sounds
Indicate whether the statement is true or false
True
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A person has a problem with blood flow from the the pulmonary veins. Which heart structure will be affected first by this blood-flow problem?
A) Left ventricle B) Right atrium C) Right ventricle D) Left atrium
Which structures create the blood brain barrier (BBB)?
A) Desmosomes and tight junctions between astrocytes and ependymal cells that form the capillary walls B) Gap junctions between ependymal cells and endothelial cells that form the capillary walls C) Gap and tight junctions between astrocytes and endothelial cells that form the capillary walls D) Gap junctions between endothelial cells that form the capillary walls E) Tight junctions between endothelial cells that form the capillary walls
The only place in the body where blood vessels can be viewed directly is the ________.
A. conjunctiva B. sclera C. optic chiasm D. retina E. cornea
Drugs called calcium channel blockers may be used to lower blood pressure by causing arteries to vasodilate. How do you suppose these drugs work?
A. They prevent calcium from entering the sarcoplasmic reticulum of smooth muscle. B. They prevent calcium from entering cardiac muscle, thus slowing down the heart rate. C. They prevent calcium from entering smooth muscle, thus allowing the muscle to relax. D. They prevent calcium from exiting the sarcoplasmic reticulum in skeletal muscle. E. They stimulate the calcium pump in smooth muscle, thus removing calcium from the calmodulin.