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Chapter 10: Problem 7

The hormone ____ motivates eating behavior. The hormone ___ is involved in long-term body fat regulation. a. leptin; ghrelin b. ghrelin; leptin c. ghrelin; oxytocin d. oxytocin; ghrelin

Short Answer

Expert verified
The correct answer is b. ghrelin; leptin.

Step by step solution

01

Identify the Function of Each Hormone

Understand the roles of the hormones listed. Leptin is involved in long-term regulation of energy balance and body fat. Ghrelin is known as the 'hunger hormone' because it stimulates appetite. Oxytocin is primarily associated with social bonding and not directly related to eating or body fat regulation.
02

Match Roles with Hormones

Leptin should be associated with long-term body fat regulation, and ghrelin should be associated with motivating eating behavior according to their functions.
03

Evaluate the Options

Check each option to see if the roles of the hormones match: a. Leptin (body fat regulation); Ghrelin (motivates eating) - Correct positions but incorrect matching based on question.b. Ghrelin (motivates eating); Leptin (body fat regulation) - Correct match.c. Ghrelin (motivates eating); Oxytocin (social bonding) - Incorrect.d. Oxytocin (social bonding); Ghrelin (motivates eating) - Incorrect..
04

Select the Correct Answer

From the evaluation, option b. (ghrelin; leptin) correctly matches the defined roles of the hormones.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

ghrelin
Ghrelin is often called the 'hunger hormone.' It plays a key role in stimulating appetite and promoting food intake. When the stomach is empty, ghrelin is released and signals the brain to trigger the feeling of hunger. This hormone tells your body when it is time to eat.

Several important points about ghrelin:
  • It increases food intake.
  • It promotes fat storage.
  • It can affect energy balance.
Understanding ghrelin is vital in learning how our body regulates hunger. Ghrelin rises before meals and falls after eating. It is also affected by sleep and stress levels, indicating its complex role in overall health.
leptin
Leptin is another crucial hormone but with a different job compared to ghrelin. It is mainly involved in the long-term regulation of energy balance by suppressing appetite. Leptin is produced by fat cells and helps to signal the brain when the body has enough energy stored as fat.

Key roles of leptin include:
  • Regulating energy balance.
  • Suppressing food intake.
  • Contributing to weight maintenance.
Leptin levels are closely related to body fat levels. When body fat decreases, leptin levels drop, increasing appetite and food intake to restore energy balance. Conversely, high body fat increases leptin levels, which suppress appetite.
body fat regulation
Body fat regulation involves a complex interplay of various hormones, mainly ghrelin and leptin. These hormones help the body maintain a balance between energy intake and expenditure.

  • Ghrelin: Increases hunger and promotes food intake, ensuring that the body gets enough energy.
  • Leptin: Suppresses hunger and encourages energy expenditure, preventing excessive fat accumulation.
This hormonal balance is crucial for maintaining a healthy weight. Disruptions in this balance may lead to issues such as obesity or malnutrition. Learning about how ghrelin and leptin regulate body fat can help one understand the complexities of human metabolism and the importance of maintaining a balanced diet and lifestyle.

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Most popular questions from this chapter

Identify each of the following emotions as primary or secondary. a. fear b. happiness c. jealousy d. guilt e. disgust f. romantic love 9\. anger h. remorse

Students enrolled in a difficult class are preparing to give end-ofterm presentations, which will count 50 percent toward their final grades. Which student below is likely to perform the best? a. Ahn is not at all stressed about the presentation. He has done well all semester and is confident he will do just fine this time around, too. He puts together his slides a week before the due date and then reviews the talk a few hours before giving the presentation. b. Sonya is somewhat anxious about this presentation. She knows her stuff but recognizes how much is riding on the quality of this presentation. This anxious energy motivates her to polish her slides and practice her talk. c. Marcus is very stressed about this presentation. A bad evaluation on the presentation will ruin his grade for the class, which in turn will ruin his strong GPA. He decides to spend every waking moment preparing the talk, working late into the night and sometimes dreaming about the presentation.

True or false: Research suggests that some emotions and emotional expressions are culturally universal.
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