Which Statement About Cell Junctions Is True

question 36

Multiple Choice

Which statement about cell junctions is true?

• A) Desmosomes and gap junctions contain keratin,whereas tight junctions contain collagen.
• B) Gap junctions and tight junctions have specialized protein channels called connexins,whereas desmosomes do not.
• C) Tight junctions and desmosomes have mechanical roles,whereas gap junctions facilitate communication between cells.
• D) Desmosomes and gap junctions are found in epithelial tissue,whereas tight junctions are found only in nerve cells.
• E) All cell junctions have different functions,though structurally they are the same.

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Definitions:

Blastocyst

Mammalian blastula.

Anterior Pituitary

The front portion of the pituitary gland that secretes hormones responsible for regulating a wide range of biological functions, including growth, metabolism, and reproductive processes.

FSH

Follicle-stimulating hormone, a gonadotropin involved in the regulation of reproductive processes.

LH

Luteinizing hormone, a gonadotropin released by the anterior pituitary gland that plays key roles in controlling the function of ovaries in females and testes in males.