Videos
More than one choice may apply.
Which of the following is (are) a feature of lacrimai secretions?
a. Sebum d. Lysozyme
b. Mucus e. Antibodies
c. Peroxide
Introduction:
Lacrimal secretions are secreted from the lacrimal glands. The function of the lacrimal secretions is to lubricate the eyeball surface. It makes the conjunctiva and cornea moisturized. These secretions also provided the nutrients and dissolved the oxygen to the cornea.
Answer to Problem 1MC
Correct answer:
Lacrimal secretions are mucus, lysozyme, and antibodies.
Explanation of Solution
Justification/Explanation for the correct answer:
Options (b, d, e) are given that mucus, lysozyme, and antibodies. Lacrimal secretions contain lysozymes, mucus, and antibodies. Lysozyme destroys the bacteria for protecting the surface of the eye. All of these secretions together function to clean and protects the eye by moistening and lubricating the eye. Increased lacrimal secretions resultin the spilling of tears from the eyes that eventually filled the nasal cavities that causes the congestion. Hence, options (b, d, e) are correct.
Explanation for the incorrect answers:
Option (a) is given that sebum. Sebum is the oily and waxy substance that is composed of triglycerides, wax esters, and metabolites of fat-producing cells. It is not included in the lacrimal secretions. So, it is an incorrect option.
Option (c) is given that peroxide. Peroxide is not produced by the lacrimal glands in the form of lacrimal secretions. So, it is an incorrect option.
Hence, options (a) and (c) are incorrect.
Therefore, it can be concluded as lacrimal secretions are mucus, lysozyme, and antibodies that moisten and lubricate the eyeball.
Want to see more full solutions like this?
Chapter 8 Solutions
EBK ESSENTIALS OF HUMAN ANATOMY & PHYSI
- Shigella, Mycobacterium, and numerous other pathogens have developedmechanisms that prevent them from being killed by phagocytes.a. Suggest two or three factors that help them avoid destruction bythe powerful antiseptics in macrophages.b. Suggest the potential implications that these infected macrophagescan have on the development of disease.arrow_forwardA friend was recently diagnosed with strep throat. One week after his treatment, he redeveloped the infection. In conversation, your friend tells you, “I must have become immune to the drug the doctor gave me!” a. Discuss the validity of your friend’s statement, providing evidence in support of or refuting his claim. b. After further conversation, your friend tells you that he stopped taking his initial antibiotics after 2 days because he “felt 100% better.” Explain how this action might have played a role in the redevelopment of his infection. c. When he returned to his physician, she ordered a test to determine which antibiotic should be prescribed to treat his reinfection. Summarize a test that could be used to obtain this information.arrow_forwardThe photomicrograph shows a section of synovium from the knee joint of a patient with rheumatoid arthritis (RA). Which of the following are the most abundant cells in the inflammatory infiltrate? A. Eosinophils B. Langhans type giant cells C. Lymphocytes and plasma cells D. Neutrophils E. Type A and B synovial cellsarrow_forward
- Explain the path of a monocyte from the blood to the tissue during inflammation. (Use the terms margination, diapedesis and chemotaxis.)arrow_forwardWhich of the following leads to swelling seen in an inflammation? a. Vasodilation b. Complement activation c. Phagocytosis by macrophages d. Increased capillary permeabilityarrow_forwardPlasma proteins that are late acute phase reactants include all the following except? a. haptoglobin b. ceruloplasmin c. complement C3, C4 d. transthyretinarrow_forward
- Which of the following does not describe the outcome of complement activation? a. chemotaxis b. opsonization c. vasoconstriction d. proteolysis e. membrane permeabilization.arrow_forwardA. In a table give three differences between antigen and antibodies B. Explain the structure of the antibody molecule C. Discuss the differences between humoral and cell mediated immunity in terms of chemicals and cells involved in each process as they tackle pathogens. You should write no more than 450 words.arrow_forwardWhich of the following does not accurately describe complement components? A. made by the spleen B. located in extracellular spaces C. some function as proteases once activated D. activated by a cascade of enzymatic reactions. E. soluble proteinsarrow_forward
- Which of the following leads to the redness ofinflammation?a. increased vascular permeabilityb. anaphylactic shockc. increased blood flowd. complement activationarrow_forwardChoose the combination of answers that most accurately completes the statement. In what process is tumor necrosis factor (TNF) not involved? a. chemotaxis of phagocytes b. fever c. the infl ammatory response d. the classic complement pathwayarrow_forwardThe cardinal signs of inflammation includeall of the following except. a. redness.b. swelling.c. heat.d. fever.e. painarrow_forward
Medical Terminology for Health Professions, Spira...Health & NutritionISBN:9781305634350Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. SchroederPublisher:Cengage Learning