Free Homeostasis MCQs with Answers
698 Homeostasis MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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Read the Homeostasis notesFree MDCAT chapter notes with key terms698 questions · page 22 of 35
- A. Disinfestation
- B. Chemotherapy
- C. Antisepsis
- D. Immunity
Explanation: In biology, immunity is the balanced state of multicellular organisms having adequate biological defenses to fight infection, diseases or…
Correct answer: Immunity- A. Skin
- B. Phagocytes
- C. Mucous membrane
- D. Skin and Mucous membranes both
Explanation: Skin provides physical barrier against outer threats whereas mucous membranes provide barrier againstinner threats.
Correct answer: Skin and Mucous membranes both- A. Antibodies
- B. Humoral immune response
- C. Phagocytes
- D. Cell mediated response
Explanation: Phagocytes are part of general defence system of our body and make second line of defence in our body.
Correct answer: Phagocytes- A. Relationship with bursa of Fabricius and thymus gland respectively
- B. Origin from bursa Fabricius and thymus, respectively
- C. Storage in bursa of Fabricius and thymus
- D. Destruction in bursa of Fabricius
Explanation: T cells attain immunological competence by thymus gland whereas B cells were discovered from Bursa of Fabricus.
Correct answer: Relationship with bursa of Fabricius and thymus gland respectively- A. B lymphocytes
- B. Antibodies
- C. T-lymphocytes
- D. Immunoglobulins
Explanation: The influence of the thymus gland is essential in making the T-cells immunologically competent.
Correct answer: T-lymphocytes- A. Variable sequence of amino acid is longer one
- B. Variable sequence of amino acid is shorter one
- C. Both variable and constant amino acids sequences have equal length
- D. Only variable sequence of amino acids occurs
Explanation: The variable and constant regions differ in length and amino acid composition.
Correct answer: Variable sequence of amino acid is longer one- A. Antigens
- B. Immunogens
- C. Antibodies
- D. Antibiotics
Explanation: An antibody (Ab), also known as an immunoglobulin (Ig), is a large Y-shaped protein produced mainly by plasma cells that is used by the…
Correct answer: Antibodies- A. Antitoxins
- B. Antivenom serum
- C. Material from some similar disease
- D. Attenuated germs
Explanation: A serum containing antibodies against venome.
Correct answer: Antivenom serum- A. Bacterial disease
- B. Cancer
- C. Viral disease
- D. Bacterial disease or cancer
Explanation: Because his/her immune system fails to defend him/her.
Correct answer: Bacterial disease or cancer- A. Snake bite
- B. Rabies
- C. Infectious hepatitis
- D. AIDS
Explanation: No cure have been discovered or developed for AIDS so far.
Correct answer: AIDS- A. Active immunization
- B. Natural immunization
- C. Passive immunization
- D. Innate immunity
Explanation: As antibodies are being introduced into the body, so it is passive immunization.
Correct answer: Passive immunization- A. Active immunization
- B. Natural immunization
- C. Passive immunization
- D. Innate immunity
Explanation: Antirabies serum contains antibodies against rabies and injection of antibodies to somebody is called passive immunization.
Correct answer: Passive immunization- A. Active immunization
- B. Natural immunization
- C. Passive immunization
- D. Innate immunity
Explanation: Anti tetanus serum contains antibodies against tetanus (Clostridium tetani), thus injection of anti-tetanus serum is a source of passive…
Correct answer: Passive immunization- A. Synthesis of antibodies
- B. Liberation of antibodies in blood plasma
- C. Attaching the antibodies to the surface of bacteria
- D. Liberation antibodies in tissue fluid
Explanation: Antibodies are synthesized and liberated into the blood by plasma cells.However, they do not attach them.
Correct answer: Attaching the antibodies to the surface of bacteria- A. Small pox
- B. Anthrax
- C. Cox pox
- D. Chicken Cholera
Explanation: Pasteur made many discoveries concerning the cause and prevention of infectious diseases.
Correct answer: Anthrax- A. Cow pox pus
- B. Attenuated cultures of bacteria
- C. Small pox pus
- D. Attenuated cultures of viruses
Explanation: Louis Pasteur called the attenuated cultures of bacterial vaccine and immunization with attenuated cultures of bacteria vaccination
Correct answer: Attenuated cultures of bacteria- A. Skin
- B. Mucus
- C. Neutrophils
- D. Saliva
Explanation: Once pathogens are able to neutralize the responses from the first line of defense i.e.
Correct answer: Neutrophils- A. Sweat gland
- B. Dermis
- C. Dermis and epithelium
- D. Sweat gland, dermis and epithelium
Explanation: The physical components of the skin defense include: Epidermis: The outermost layer of the skin, the epidermis, acts as a physical barrier…
Correct answer: Sweat gland, dermis and epithelium- A. HCI in stomach
- B. Mucus and cilia in nose/in nasal cavity
- C. Mucus of bronchi
- D. HCl in stomach, Mucus and cilia in nose/in nasal cavity and Mucus of bronchi.
Explanation: HCl kills bacteria present in food. Thus provide defense against infections in our digestion tract.
Correct answer: HCI in stomach- A. X
- B. Y
- C. J
- D. H
Explanation: Each antibody consists of four polypeptides-two heavy chains and two light chains joined to form a "Y" shaped molecule.
Correct answer: Y