Free Digestion MCQs with Answers
680 Digestion MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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Read the Digestion notesFree MDCAT chapter notes with key terms680 questions · page 23 of 34
- A. 1st line of defense
- B. 3rd line of defense
- C. 2nd line of defense
- D. 4th line of defense
Explanation: The third line of defense is immune cells that target specific antigens.
Correct answer: 3rd line of defense- A. 1st line of defense
- B. 3rd line of defense
- C. 2nd line of defense
- D. 4th line of defense
Explanation: Phagocytes are type of cells within the body capable of engulfing and absorbing bacteria and other small cells or particles.
Correct answer: 2nd line of defense- A. Skin
- B. Mucus
- C. Stomach HCL
- D. Antibodies
Explanation: Skin, HCl and mucous of barriers which constitute 1st line of defense while antibodies produced by lymphocytes which belong to 3rd line of…
Correct answer: Antibodies- A. Cell mediated
- B. Cell humoral
- C. CeII signaling
- D. Cell to cell
Explanation: Cyclosporine is used to prevent organ rejection (cell mediated) in people who have received a liver, kidney or, heart transplant.
Correct answer: Cell mediated- A. Innate immunity
- B. Adaptive immunity
- C. Acquired immunity
- D. Secondary immunity
Explanation: The innate immunity also known as the non specific immunity or in-born immunity is an important subsystem of the overall immune system…
Correct answer: Innate immunity- A. Antibiotics are injected
- B. Antisera are injected
- C. Antioxin are injected
- D. Antibodies are produced
Explanation: In passive immunization we inject antibodies in the body: body does not makes it own antibodies.
Correct answer: Antibodies are produced- A. Bacterial
- B. Fungal
- C. Vaccinations have not yet been made for viral infections.
- D. Microbial
Explanation: Vaccines have been prepared against different types of bacterial and viral infections, but there is no vaccine against fungus yet.Vaccine…
Correct answer: Fungal- A. All animals
- B. Humans only
- C. Invertebrates only
- D. All vertebrates
Explanation: The correct answer is "Vertebrates." Vertebrates, including humans, possess a stronger and more specific immune system compared to…
Correct answer: All vertebrates449. An antigen is:
- A. Residue of antibody
- B. Result of antibody
- C. Stimulus for antibody formation
- D. Opposite to an antibody
Explanation: An antigen is any substance that causes your immune system to produce antibodies against it.
Correct answer: Stimulus for antibody formation450. A vaccine contains:
- A. Antigens
- B. Macrophages
- C. Antibodies
- D. All A,B,C
Explanation: Is used to prepare vaccine that may be weakened or killed. It will provide active acquired inmmnity against a particular disease
Correct answer: Antigens- A. B lymphocytes
- B. Basophils
- C. T lymphocytes
- D. Neutrophils
Explanation: In humoral immune response B-lymphocytes proliferate and form plasma clone cell and memory cells.
Correct answer: B lymphocytes- A. Blood cells
- B. Bursa of Fabricius
- C. Bone marrow
- D. Thymus
Explanation: B-lymphocytes are cells of immune system that produced from bone marrow in human but in case of birds they are originated from Bursa of…
Correct answer: Bone marrow- A. Pineal
- B. Thymus
- C. Pituitary
- D. Andrenal
Explanation: The thymus is a specialized primary lymphoid organ of the immune system. Within the thymus, lymphocytes or T cells mature.
Correct answer: Thymus- A. One
- B. Three
- C. Two
- D. Four
Explanation: An antibody, also known as an immunoglobulin, is a large, Y-shaped protein used by the immune system to identify and neutralize foreign…
Correct answer: Four- A. Cell-mediated response
- B. Active immunity
- C. Humoral immune response
- D. Passive immunity
Explanation: The humoral immune system deals with antigens from pathogen, that are freely circulating, or outside the infected cells.
Correct answer: Cell-mediated response- A. Active immunity
- B. Artificially induced immunity
- C. Passive immunity
- D. Naturally induced immunity
Explanation: Two types of immunity exist - active and passive: Active immunity occurs When our own immune system is responsible fo, protecting us from…
Correct answer: Passive immunity- A. Engulf bacteria
- B. Produce histamine and heparin
- C. Produce antibodies
- D. Initiate blood clotting
Explanation: Antibodies are produced by plasma cells of B-lymphocytes.
Correct answer: Produce antibodies- A. Cell-mediated response
- B. Humoral response
- C. Hormonal response
- D. Phototactic response
Explanation: Humoral inmunity is the aspect of immunity that is mediated by macromolecules found in extracellular fluids such as secreted antibodies…
Correct answer: Humoral response- A. Passive Immunity
- B. Natural Active Immunity
- C. Artificial Active Immunity
- D. Humoral Immunity
Explanation: Passive immunity is given from mother to child through the placenta before birth, and through breast milk after birth.
Correct answer: Passive Immunity460. To combat the active infections of tetanus, rabies and snakes the _ method of immunization is used:
- A. Active
- B. Active artificial
- C. Humoral
- D. Passive
Explanation: The passive rabies immunization is commonly used after a certain type of wild animal bites and accident etc.
Correct answer: Passive