Tight junctions
a. prevent passage of materials into epithelial cells
b. force materials to pass between cells
c. are commonly found in digestive tract linings
d. comprise part of the glycocalyx
e. consist of cadherin proteins
C
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The disorder characterized by a pathological fear of gaining weight and a distorted body image is ____________________
Fill in the blank(s) with correct word
The net intake and output of calcium for the entire body is regulated most directly by the activities of the kidneys and the gastrointestinal tract.
Answer the following statement true (T) or false (F)
Which is NOT true about receptors that mediate digestive reflexes?
A. They include chemoreceptors, osmoreceptors, and mechanoreceptors. B. They only activate feedforward pathways. C. They may be endocrine cells. D. They may relay information to integrative centers in the CNS or to the enteric plexuses. E. They are located in the gastrointestinal tract wall.
A neuron receives a stimulation that causes Cl- channels to open, resulting in a hyperpolarization of the neuronal membrane. This situation is an example of a(n)
A. facilitated potential. B. excitatory postsynaptic potential. C. divergence. D. inhibitory postsynaptic potential.