15. This type of epithelia has cells that produce9bstance and release it, eit bl

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15. This type of epithelia has cells that produce9bstance and release it, eit blood a exchange b. transport c. cillated d. protective e secretory 16. What will occur if solution A (500ml solution containing 400mosmol/ nonpenetrating solute) is separated by a biological membrane from solution 8 (4L solution containing 600mosmel/L norpenetrating solute)? The volume of solution A will increase b. The volume of solution B will increase. c. There will be no net volume change. d. The norpenetrating solute will move from solution B to solution A 17, Compared to the outside surface, the inside of a resting cell membrane is a. positively charged b. negatively charged c. electrically neutral d. continuously reversing its electrical charge. 18. Facilitated diffusion and active transport differ in that a. facilitated diffusion uses cell membrane proteins to move sub stances, whereas active transport b. facilitated diffusion uses a substrate to bind to a protein carrier, whereas active transport does c. ATP is necessary for active transport, but not for facilitated diffusion. not d. potential energy is required for active transport but not for facilitated diffusion. 19. The tonicity of a solution only depends on a. total concentration of all solutes b. concentration of nonpenetrating solutes. c concentration of penetrating solutes d. concentration of all ions. 20. are molecules that bind to the receptor in such a way that they block the normal ligand from binding and turning the receptor on. As a result, the signal pathway remains inactive. a Primary ligands b. Paracrines c. Neuromodulators d. Antagonists e. Agonists

Explanation / Answer

15. e. Secretory

Explaination- Secretory epithelial cells are capable of secreting and releasing the mucous and specific chemical onto their surfaces for e.g. the epithelium of the small intestine releases digestive enzymes and cells lining the respiratory tract secrete mucous that traps incoming microorganisms and dust particles to avoid infection. Epithelium present in the endocrine gland also called glandular epithelium contains many secretory cells which secret their secretions directly into blood.

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