The internal environment
a. is not in direct contact with the body's cells
b. consists of the intracellular fluid
c. must be maintained at absolutely unchanging composition, temperature, and volume for survival of the body
d. is in direct contact with the body's cells and consists of the extracellular fluid
e. consists of the intracellular fluid and must be maintained at absolutely unchanging composition, temperature, and volume for survival of the body
D
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The ion that plays a key role in initiating electrical signals in neurons is
A) Ca2+. B) Cl-. C) K+. D) Na+.
The oblique line separating the abdomen and the lower limb is the location of (the)
A) inguinal canal. B) radial nerve. C) costal margin. D) jugular notch. E) None of the answers are correct.
The ________ function(s) in visual attention, such as to look and follow the flight of a butterfly.
A. superior colliculi B. inferior colliculi C. tegmentum D. red nucleus E. substantia nigra
The hypodermis consists mostly of
A. dense regular connective tissue. B. adipose tissue. C. stratified squamous epithelium. D. dense irregular connective tissue.