Chapter 9, Problem 10TY

Summary Introduction

Introduction:

Hormone is defined as an organic substance which acts as signaling molecule. Hormone is produced by endocrine gland in multicellular organisms. It is transported by circulatory system and is responsible for the regulation of physiology and behavior.

Answer to Problem 10TY

Correct answer:

Leptin is a type of hormone which is involved in appetite loss. Therefore, option a. is correct.

Option a. is given as “appetite control”.

Explanation of Solution

Reasons for the correct statement:

Leptin is a hormone that controls appetite. When released into the bloodstream, this hormone signals the hypothalamus that the body has enough food and reduces appetite by increasing the feeling of being full or satisfied. Genetic abnormality in the receptors of leptin as well as leptin resistance causes obesity.

Hence, option a. is correct.

Reasons for the incorrect statements:

Option b. is given as “metabolism control”.

Metabolism is controlled by thyroid hormone and is involved in the regulation of metabolic rate of body. Hence, it is a wrong answer.

Option c. is given as “digestion of fatty foods”.

Digestion of fatty foods is regulated by secretin, motilin and gastrin hormone. Hence, it is a wrong answer.

Option d. is given as “neurotransmissions”.

Neurotransmission is regulated by acetylcholine, serotonin, dopamine and norepinephrine. Hence, it is a wrong answer.

Hence, options b., c., and d. are incorrect.

Conclusion

Leptin is a hormone which is secreted by hypothalamus gland and is responsible for the regulation of appetite control.