Question

21.) Special lymphatic capillaries in the small intestines are called

villi.

lymph.

lacteals.

lymph nodes.

22.) Which of the following is a primary lymphatic organ?

spleen

tonsil

thymus

lymph node

23.) Which molecule from a cytotoxic T cell creates holes in plasma membranes of virus-infected or cancer cells?

interferon

cytokine

perforin

interleukin

24.) What is meant by an autoimmune disease?

antibodies are produced automatically

antibodies act against the individual's own tissue

antibodies are not produced

antigens resist antibodies

25.) Which part of the respiratory system does not have ciliated pseudostratified columnar epithelia?

oropharynx

the trachea

the nasopharynx

secondary (lobar) bronchi

the bronchi

Answer 1

21.) b. Lacteals.

Lacteals are lymph capillaries seen in center of villi in small intestine.

22.) c. Thymus.

mainly there are two primary lymphatic organs are there.

1. Bone marrow
2. Thymus

23.) c. perforin.

activated t cells produce perforin. Which get into the wall of infected cell and make a hole.

24.) b. antibodies act against the individuals own tissue.

autoimmune disease is condition where the antibodies produced by the tissue act against the own tissues as a foreign body.

25.) c. Nasopharynx.

respiratory tract is usually lined by ciliated pseudostratified columnar epithelium but the epithelium not present in nasopharynx mainly on larynx or pharynx.