Which of the following statements is not correct?

Opioid is a medicine used to help patients to cope with mental illnesses.

Acquired immunity is pathogen specific.

Macrophages can phagocytose and destroy microbes.

Hallucinogenic chemicals obtained from leaves, resins and inflorescence of plant Cannabis sativa are called as cannabinoids.

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 75

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Given below is the diagram of the human lymphatic system, where A, B, C, and D are lymphoid organs. Select incorrect options regarding the lymphoid organs labeled as A, B, C, and D.

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Important Questions on Human Health and Disease

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 76

Which of these glands is large at the time of birth but in adults, it reduces to a very small size?

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 77

Read the following statements regarding spleen and select the correct option.
(i) Spleen is a large oval-shaped organ which mainly contains lymphocytes and phagocytes.
(ii) Spleen is a large reservoir of erythrocytes.
(iii) Spleen is a primary lymphoid organ.
(iv) Spleen acts as a filter of the blood by trapping blood-borne microorganisms.

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 78

MALT is

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 79

The lymphoid tissue, located within the lining of digestive tract is

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