Absorptive cells of the gastrointestinal tract are located within the mucosa.
Answer the following statement true (T) or false (F)
True
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The single-celled protists are often elongated rather than spherical in order to
a. decrease ?X from environment to mitochondria. b. increase "D.". c. increase ?P. d. increase "A.".
Match the chemical signal with the appropriate description.A. Chemicals produced by neurons that function as hormonesB. Chemicals that act locally on nearby cellsC. Chemical secreted by presynaptic terminalD. Influences same cell type from which it is secretedE. Chemical secreted into blood by specialized cells; travels some distance to target tissuesNeuropeptide
Fill in the blank(s) with the appropriate word(s).
Describe the overlap in function between the muscular system and skeletal system
In other words, describe how they work together.
Which is TRUE about typical, resting neurons?
A. The plasma membrane is most permeable to sodium ions. B. The concentration of sodium ion is greater inside the cell than outside. C. The permeability of the plasma membrane to potassium ions is much greater than its permeability to sodium ions. D. The plasma membrane is completely impermeable to sodium ions. E. The plasma membrane is completely impermeable to potassium ions.