A Study in Rats Finding That Greater Concentrations of Sucrose,an

question 26

Multiple Choice

A study in rats finding that greater concentrations of sucrose,an enjoyable taste for rats,led to greater concentrations of dopamine in the nucleus accumbens suggests that:

• A) sucrose serves as an agonist for dopamine neurons.
• B) dopamine levels increase as the value of reward increases.
• C) an increased firing rate of GABA neurons occurred in the ventral tegmental area.
• D) sucrose was likely a novel stimulus.

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Definitions:

Interstitial Fluid

The fluid that fills the spaces between cells in tissues, providing a means of nutrient and waste transport between blood vessels and cells.

Nephron Tubules

The intricate network of tiny tubes in the kidney where urine is formed through processes of filtration, absorption, and secretion.

Heterotherms

Organisms that can switch between self-regulating their body temperature and allowing the external environment to influence it.

Ectotherms

Organisms that regulate their body temperature through external sources, rather than internal metabolic processes.