__________ are structures that promote the upward flow of blood in leg veins by preventing backflow.
Fill in the blank(s) with the appropriate word(s).
Valves
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Which brain area is considered to be a key integrating center for homeostasis?
A) pituitary gland B) brain stem C) hypothalamus D) thalamus E) medulla
The extracellular fluid is made up of which two components?
a. lymph and plasma b. cellular matrix and globular filtrate c. plasma and interstitial fluid d. white blood cells and lymph e. red blood cells and interstitial fluid
Cholinergic receptors bind neurotransmitters released from ________.
A. the adrenal medulla B. postganglionic sympathetic neurons C. preganglionic parasympathetic neurons D. adrenergic neurons
How would decreased diffusion across the arachnoid granulations affect the volume of cerebrospinal fluid in the ventricles?
A) Decreased diffusion across the arachnoid granulations would decrease the volume of CSF in the ventricles because less CSF would reenter the bloodstream. B) Decreased diffusion across the arachnoid granulations would decrease the volume of CSF in the ventricles because more CSF would reenter the bloodstream. C) Decreased diffusion across the arachnoid granulations would increase the volume of CSF in the ventricles because less CSF would reenter the bloodstream. D) Decreased diffusion across the arachnoid granulations would increase the volume of CSF in the ventricles because more CSF would reenter the bloodstream. E) Decreased diffusion across the arachnoid granulations would not change the volume of CSF because the amount of CSF reentering the bloodstream can accommodate for the changes.