Describe how receptive field size influences receptor acuity
What will be an ideal response?
Neurons with small receptive fields have a higher acuity (sensitivity) than those with large receptive fields. This occurs because small receptive fields have receptors densely packed into a small area and can monitor smaller areas of skin. This allows fine discrimination between separate receptive fields. More sensitive areas of skin (hands, lips) have small receptive fields compared to areas like the elbow and knee which are less sensitive.
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The reaction in which water and carbon dioxide combine to form carbonic acid is
A. irreversible, as carbonic acid rapidly causes a drop in pH. B. reversible, and can proceed in either direction depending on the concentrations of the molecules. C. exergonic, and is an important energy source within the body. D. an exchange reaction in which protons are transferred between atoms. E. a catabolic reaction in which the formation of a larger molecule can lead to an increase in cell size.
On a microtubule, the motor molecule called ____________________ moves toward a centriole
Fill in the blank(s) with correct word
Aldosterone
a. causes conservation of sodium b. facilitates lipolysis c. promotes gluconeogenesis d. is regulated by ACTH e. is secreted by the adrenal medulla
As the _________ gland decreases in size with aging, so does the number of T cells.
Fill in the blank(s) with the appropriate word(s).