You work in a paper mill. The smell is horrible every day when you get to work, but by the end of the day, you hardly notice it. Why?
What will be an ideal response?
Olfactory receptors are phasic. They fire rapidly when they are initially exposed to the smell, but they quickly adapt and cease firing when stimulus (smell) remains constant. They adapt to the new steady state and then turn off so that you don't notice the smell after a little while.
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Synaptic knobs are at the ends of
A. cell bodies. B. neuroglia. C. dendrites. D. axons.
Identify the true statement(s) about sensory receptors:
a. The larger the receptor potential, the greater the frequency of action potentials initiated in the afferent neuron. b. Tonic receptors often exhibit an "off-response." c. Phasic receptors are important in situations where maintained information about a stimulus is valuable. d. Receptor adaptation results from nerve fatigue. e. Receptors are part of efferent neurons.
diabetes insipidus(DI) results from hyperactivity of the pancreatic islet cells
a. true b. false
What is the function of Peyer's patches?
A. Guard against pathogens entering the body through the nose or mouth. B. Fight any bacteria moving into the small intestine from the colon. C. Remove anything that may be potentially harmful in lymph. D. Stand guard against and fight any pathogens trying to enter the body.