Difficulty: Medium

Average Score: 57%

Which of the following occurs when the lateral hypothalamus of rats is damaged?

Rationale

They stop eating and may eventually starve to death.

Damage to the lateral hypothalamus disrupts the regulation of hunger and satiety, leading to a significant decrease in food intake. This area of the brain is crucial for stimulating appetite, so its impairment can result in the cessation of eating behavior, ultimately leading to starvation.

A (They become submissive to other rats.) YOUR ANSWER

While behavioral changes can occur due to brain damage, the specific role of the lateral hypothalamus is linked to hunger regulation rather than dominance or submission in social contexts. Therefore, damage does not primarily cause submissive behavior towards other rats.

B (They become agitated and attack other rats.) YOUR ANSWER

Although aggression can be associated with certain brain alterations, the lateral hypothalamus is not specifically related to aggressive behavior. Instead, its damage leads to decreased appetite rather than increased agitation or aggression.

C (They stop eating and may eventually starve to death.) CORRECT

This is the correct choice, as damage to the lateral hypothalamus leads to a loss of appetite and eating behavior. The lateral hypothalamus is integral to hunger signals, and its malfunction results in severe disruptions to feeding, potentially causing starvation.

D (They will eat only foods that are sweet.) YOUR ANSWER

While preferences for certain food types can be influenced by brain regions, damage to the lateral hypothalamus does not specifically cause rats to develop a preference for sweet foods. Instead, it leads to a general decrease in food intake, regardless of taste.

Conclusion

The lateral hypothalamus plays a vital role in regulating hunger and feeding behavior. When this region is damaged, rats experience a drastic reduction in appetite, leading to a cessation of eating and potential starvation. Other behavioral changes mentioned in the incorrect choices do not directly correlate with the specific functions of the lateral hypothalamus. Understanding these effects highlights the importance of this brain area in maintaining energy balance and feeding behaviors in rats.

Related Questions

View all