Negative selection is the process by which cells learn self-tolerance
Indicate whether this statement is true or false.
TRUE
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The structures that help prevent toxins in the blood from reaching the brain make up the __________ __________ barrier.
Fill in the blank(s) with the appropriate word(s).
What is a collection of similar cells and surrounding substances?
A. Organ B. Intracellular matrix C. Tissue D. Extracellular matrix E. Organ system
Which of the following statements concerning the larynx is correct?
A. The larynx contains four unpaired cartilages. B. When the glottis closes, air is prevented from leaving the lungs. C. Unlike other portions of the larynx, the epiglottis consists of some bony tissue. D. The inferior laryngeal cartilage is the thyroid cartilage. E. The epiglottis is also called "Adam's apple".