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ATI LPN · Anatomy and Physiology · PAL Histology Lymphatic System Lab Practical Question 1

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

Which cells in the thymus examine T cells for MHC restriction and tolerance of self during positive selection?

A. Medullary thymic epithelial cells

B. Thymic dendritic cells

C. Cortical thymic epithelial cells

D. Bone marrow cells

Correct Answer: Cortical thymic epithelial cells

Question 2 of 5

venous sinus open into

A. penicillar arteriole

B. red pulp vein

C. venous sinus

D. follicular arteriole

Correct Answer: red pulp vein

Question 3 of 5

Which immunoglobulin is the least prevalent?

A. IgA

B. IgD

C. IgE

D. IgM

Correct Answer: IgE

Question 4 of 5

Which type of antigen-presenting molecule is found on all nucleated cells?

A. MHC II

B. MHC I

C. antibodies

D. B-cell receptors

Correct Answer: MHC I

Question 5 of 5

Vibrations from the sound waves are amplified by

A. the eardrum

B. Anvi

C. Stirrup

D. All above

Correct Answer: Stirrup