The release of factors by cells that influence the activity of nearby cells is referred to as:
A. autocrine signaling.
B. paracrine signaling.
C. endocrine signaling.
D. electrical signaling.
E. pheromonal signaling.
Answer: B
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What cell type(s) are found in nervous tissue?
a. neurons only b. glial cells only c. squamous cells only d. both neurons and glial cells e. both glial cells and squamous cells
When Bayliss and Starling conducted experiments to
determine what caused secretion of pancreatic juice, they a. cut the blood supply to the upper digestive tract. b. added acidic food to the small intestine and got secretions of pancreatic juices. c. cut the nerve supply to the upper digestive tract. d. got a response from the pancreas using extracts of cells lining the intestinal tract. e. did all of these except “cut the blood supply to the upper digestive tract.”
Explain energy transduction and receptor potential as they relate to the function of a sensory receptor. What will be an ideal response?
A student performed the modified use-dilution test described in this exercise, after incubation the nutrient broth appeared cloudy. What does this mean?
A) The disinfectant was effective at killing all the bacterial cells on the washer B) The disinfectant was not effective at killing all the bacterial cells on the washer