Explain the function of the lacrimal sac
What will be an ideal response?
The enlargement of the upper portion of the lacrimal duct is known as the lacrimal sac. Tears secreted by the lacrimal glands are pulled into this sac and subsequently forced into the nasolacrimal duct by the blinking action of the eyelids. The sac is dilated and pulls in fluid as the muscles associated with blinking close the lids. The sac constricts, forcing the fluid down the nasolacrimal duct as the lids are opened.
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________ are protein molecules on a bacterium or virus that the immune system identifies as being foreign
Fill in the blank with the right word.
Which of the following is not an endocrine gland?
A) lymph gland B) pituitary gland C) thyroid gland D) pineal gland
Ulama was associated with human sacrifice.
Answer the following statement true (T) or false (F)
What is the role of B cell receptors (BCRs) and T cell receptors (TCRs) in the immune response?
to release chemicals which destroy pathogens to recognize specific epitopes of an antigen to combine with haptens so they can stimulate an immune response to release the cytokines needs for immune cell stimulation to communicate with lymphocytes and other white blood cells