Which statement is consistent with the current understanding of neural tissue?
A. A person is born with all of the neurons they will ever have.
B. Most neurons formed in fetal development last a lifetime, but some brain regions in adults can generate new neurons.
C. Neurons are constantly dying and being replaced throughout all regions of the brain.
D. Stem cells in the brain become glia, which can later become neurons if there is a need for them to do so.
B
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The largest of the four dural septa, this large, sickle-shaped vertical fold of dura mater separates the left and right cerebral hemispheres
A. Diaphragma sellae B. Falx cerebelli C. Tentorium cerebelli D. Superior sagittal sinus E. Falx cerebri
What cells release histamine?
a. mast cells b. goblet cells c. eosinophils d. macrophages e. monocytes
Ruminants frequently vomit
Indicate whether the statement is true or false
Multiunit smooth muscle cells
A. generally have individual innervation of each cell. B. have many gap junctions between cells. C. respond to stretch by relaxing. D. can only be excited, and not inhibited. E. have abundant T-tubules.