30) Why might someone pale when they are exposed to a cold temperature? 0) A) Pu

Question

30) Why might someone pale when they are exposed to a cold temperature? 0) A) Purely psychological B) Dehydration of the stratum cormeum C) Vasodilation has occurred D) Constriction of the dermal collagen and elastic fibers E) Vasoconstriction has occurred 1) 31) Which is not a membrane-bound organelle? A) Lysosome B) Golgi apparatus C) Peroxisome E) All of the choices are membrane-bound organelles. epithelium, which functions in 32) 32) The walls of kidney tubules are formed by resorbing materials filtered from blood plasma such as nutrients, ions, and water. A) stratified columnar B) stratified squamous C) simple cuboidal D) stratified cuboidal B) simple squamous 33) 33) Respiratory physiology is primarily the study of A) the tissue composition of the airways, air sacs, and blood vessels. B) how gases are transferred between the lungs and the blood vessels supplying them C) cell shape within the alveoli of the lungs. D) the branching pattern of the small airways of the lungs. 34) 34) When mucin mixes with water, it becomes A) bone. B) solid. C) muscle. D) mucus.

Explanation / Answer

30. Option C is correct. During cold exposure vasoconstriction occurs to enhance the blood flow to provide warmness which results in pale colouration of skin.

31. Option E is correct. These all are membrane bound cell organelle.

32. Option C is correct. Simple cuboidal is a single layer thick and made of cube-shaped cells which have character for aborption.

33. Option B is correct. Repiratory physiology deals with the study of exchange of gases between lungs and blood.

34. Option D is correct. Mucin forms mucous after mixing with water.

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