When each cell specializes in a certain tasks, some cells make fingernails, others become blood cells, brain cells, kidney cells, Etc.
Answer:
The correct answer is A. The larynx moves up against epiglottis when food is swallowed to prevent passage of food into it.
Explanation:
The epiglottis is a moist, cartilaginous structure that is part of the cartilaginous skeleton of the larynx. It also marks the boundary between the oropharynx and the laryngopharynx. The epiglottis obstructs the passage of the bolus at the time of swallowing preventing it from going to the respiratory system.
Larynx closure occurs when the vestibular and vocal folds approach the midline during swallowing. Occasionally, when you eat very fast, solid foods or liquids can enter the larynx.
I would say it deactivates, because enzymes are picky about the type of environment they are in and will only work if they have the right environment. Hope i help.
Answer: Option B) is a foreign molecule that evokes a specific response by a lymphocyte
Explanation:
An antigen is a large, foreign molecule (such as a protein) that stimulates the host organism to secrete lymphocytes and specific antibodies that bind to the foreign molecule, labelling it as foreign and destined for destruction.
Thus, option B is the answer
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