Which valve is positioned between the right atrium and the right ventricle?
Ans: Tricuspid
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A vertebra is considered an irregular bone.
Answer the following statement true (T) or false (F)
What feature of phospholipids allows them to interact with aqueous cytosol and extracellular fluid, while still presenting a barrier to hydrophilic substances?
A. They are polar molecules. B. They are nonpolar molecules. C. They are lipids. D. They are extremely rigid molecules. E. They are amphipathic molecules.
What is the role of myosatellite cells?
A. They provide a source of calcium B. They repair damaged muscle tissue C. They produce ACh receptors D. They lead to relaxation of muscle
The dura mater surrounding the brain consists of two layers. Give a functional reason for the fact that there are two layers instead of only one.
A. The two layers form a stronger blood-brain barrier. B. Spaces between layers collect blood for return to the venous system. C. Fluid between the layers reduces friction. D. Arteries are sandwiched between the layers. E. The spaces are where cerebrospinal fluid is reabsorbed.