Biology ยท Science General

Human Digestive System

1,953 Questions

The human digestive system explores the breakdown of biomacromolecules, covering organs from the stomach to the small intestine. It involves physiological processes like chyme movement, pH levels, and nutrient absorption in the gut. These fundamental biology concepts are regularly featured in medical and general science competitive exams.

Small intestine functionsBiomacromolecule breakdownStomach and digestionIntestinal bacteria

Human Digestive System Questions

Multiple choice

The enteric nervous system is responsible for:

  1. Controlling digestion

  2. Regulating heart rate

  3. Controlling blood pressure

  4. Controlling voluntary muscle movement
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The enteric nervous system is responsible for controlling digestion.

Multiple choice

Which of the following is a type of digestive cancer?

  1. Esophageal Cancer

  2. Lung Cancer

  3. Breast Cancer

  4. Prostate Cancer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Esophageal cancer is a type of digestive cancer that starts in the esophagus, the tube that carries food from the mouth to the stomach.

Multiple choice

Which of the following is a chronic disease that affects the digestive system and can cause abdominal pain, diarrhea, and constipation?

  1. Crohn's disease

  2. Ulcerative colitis

  3. Irritable bowel syndrome

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Crohn's disease and ulcerative colitis are both chronic inflammatory bowel diseases (IBDs). IBDs are conditions in which the digestive tract becomes inflamed. Irritable bowel syndrome (IBS) is a functional bowel disorder that can cause abdominal pain, diarrhea, and constipation. IBS is not a chronic disease, but it can be a lifelong condition.

Multiple choice

Which enzyme is commonly used to coagulate milk during cheesemaking?

  1. Rennet

  2. Pepsin

  3. Trypsin

  4. Lipase
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rennet, derived from the stomach lining of young mammals, is traditionally used to coagulate milk proteins, causing them to form a semi-solid curd.

Multiple choice

Which of the following is NOT a component of the enteric nervous system?

  1. Myenteric plexus

  2. Submucosal plexus

  3. Sympathetic nervous system

  4. Parasympathetic nervous system
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sympathetic nervous system is part of the central nervous system, while the myenteric plexus, submucosal plexus, and parasympathetic nervous system are all components of the enteric nervous system.

Multiple choice

Which of the following is NOT a type of sensory neuron found in the enteric nervous system?

  1. Mechanoreceptors

  2. Chemoreceptors

  3. Thermoreceptors

  4. Nociceptors
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nociceptors are not found in the enteric nervous system. They are sensory neurons that respond to pain.

Multiple choice

Which of the following is NOT a neurotransmitter used by neurons in the enteric nervous system?

  1. Acetylcholine

  2. Norepinephrine

  3. Serotonin

  4. Dopamine
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Dopamine is not a neurotransmitter used by neurons in the enteric nervous system. It is a neurotransmitter that is primarily involved in reward and motivation.

Multiple choice

Which of the following is NOT a disorder of the enteric nervous system?

  1. Irritable bowel syndrome

  2. Crohn's disease

  3. Ulcerative colitis

  4. Parkinson's disease
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Parkinson's disease is a disorder of the central nervous system, not the enteric nervous system.

Multiple choice

Which of the following is NOT a type of neuron found in the enteric nervous system?

  1. Motor neurons

  2. Sensory neurons

  3. Interneurons

  4. Glial cells
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Glial cells are not found in the enteric nervous system. They are cells that support the neurons in the central nervous system.

Multiple choice

Which of the following is NOT a type of neurotransmitter used by neurons in the enteric nervous system?

  1. Acetylcholine

  2. Norepinephrine

  3. Serotonin

  4. Glutamate
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Glutamate is not a neurotransmitter used by neurons in the enteric nervous system. It is a neurotransmitter that is primarily involved in excitatory synaptic transmission in the central nervous system.

Multiple choice

Which organ is responsible for producing bile, a substance that helps digest fats?

  1. Liver

  2. Pancreas

  3. Gallbladder

  4. Stomach
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The liver produces bile, which is stored in the gallbladder and released into the small intestine when needed to help digest fats.

Multiple choice

What is the role of the pancreas in digestion?

  1. To produce insulin and glucagon, hormones that regulate blood sugar levels

  2. To produce enzymes that help break down carbohydrates, proteins, and fats

  3. To produce bile, a substance that helps digest fats

  4. To absorb nutrients from food
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pancreas produces enzymes such as amylase, lipase, and protease, which help break down carbohydrates, fats, and proteins, respectively.

Multiple choice

Which of the following is a common enzyme found in fruit juices?

  1. Pectinase

  2. Amylase

  3. Lipase

  4. Protease
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pectinase is a common enzyme found in fruit juices, which helps to break down pectin, a component of the cell walls of fruits.

Multiple choice

What are prolapsed hemorrhoids?

  1. Hemorrhoids that have pushed out of the anus

  2. Hemorrhoids that have become infected

  3. Hemorrhoids that have become thrombosed

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Prolapsed hemorrhoids are hemorrhoids that have pushed out of the anus. They can be very uncomfortable and can cause pain, bleeding, and itching.

Multiple choice

Which of the following is not a common type of cheese enzyme?

  1. Lipase

  2. Protease

  3. Lactase

  4. Amylase
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Amylase is not a common type of cheese enzyme. It is an enzyme that is used to break down starch into sugar.