Chapter 7: Coordination in Life Processes — Online MCQ Test
BIOLOGY · CLASS 10th · Telangana State Board
Practice Chapter 7: Coordination in Life Processes with a free chapter-wise online MCQ test.
This chapter covers: This chapter explores the interdependence and seamless integration among different internal body systems during everyday activities. Using hunger digestion and eating as primary ex....
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Chapter 7: Coordination in Life Processes — Important Questions & Answers
Which hormone is released when the stomach is empty and triggers the sensation of hunger?
- A. Leptin
- B. Ghrelin
- C. Insulin
- D. Glucagon
Answer: B. Ghrelin
Ghrelin is the 'hunger hormone' secreted by the stomach when it is empty, signaling the brain to initiate food-seeking behavior.
Ghrelin is the 'hunger hormone' secreted by the stomach when it is empty, signaling the brain to initiate food-seeking behavior.
What is the name of the wave-like muscular contractions that move food through the esophagus and intestines?
- A. Mastication
- B. Deglutition
- C. Peristalsis
- D. Segmentation
Answer: C. Peristalsis
Peristalsis refers to the coordinated wave-like contractions of smooth muscles that propel food along the digestive tract.
Peristalsis refers to the coordinated wave-like contractions of smooth muscles that propel food along the digestive tract.
When you see or smell food, your brain triggers the release of saliva and gastric juices. This demonstrates which type of coordination?
- A. Only hormonal coordination
- B. Only muscular coordination
- C. Neural coordination involving sensory inputs and motor outputs
- D. Only chemical digestion without neural involvement
Answer: C. Neural coordination involving sensory inputs and motor outputs
The sight and smell of food trigger neural signals from sensory receptors to the brain, which then sends motor signals to initiate salivary and gastric secretions.
The sight and smell of food trigger neural signals from sensory receptors to the brain, which then sends motor signals to initiate salivary and gastric secretions.
A person suffering from leptin resistance continues to feel hungry despite sufficient energy stores. What can be inferred about their coordination system?
- A. Their ghrelin levels are abnormally high
- B. Their brain fails to respond appropriately to leptin signals, disrupting the satiety feedback mechanism
- C. Their stomach produces too much pepsin
- D. Their peristalsis is abnormally weak
Answer: B. Their brain fails to respond appropriately to leptin signals, disrupting the satiety feedback mechanism
Leptin resistance occurs when the brain's hypothalamus becomes insensitive to leptin signals, preventing proper recognition of satiety and maintaining hunger sensation.
Leptin resistance occurs when the brain's hypothalamus becomes insensitive to leptin signals, preventing proper recognition of satiety and maintaining hunger sensation.
Which of the following scenarios would most likely result in increased ghrelin secretion and hunger sensations?
- A. Immediately after consuming a large meal rich in proteins and fats
- B. During prolonged fasting or when stomach glycogen levels are depleted
- C. When leptin levels in the blood are abnormally high
- D. During intense muscle exercise when energy consumption is low
Answer: B. During prolonged fasting or when stomach glycogen levels are depleted
Ghrelin secretion increases when the stomach is empty and energy stores are depleted, as a signal to initiate food-seeking behavior.
Ghrelin secretion increases when the stomach is empty and energy stores are depleted, as a signal to initiate food-seeking behavior.