The ___ is composed of skeletal muscle fibers and is under voluntary control. A)

Question

The ___ is composed of skeletal muscle fibers and is under voluntary control. A) rectum B) sigmoid flexure C) anal canal D) internal anal sphincter E) external anal sphincter Each of the following is a function of the liver except A) synthesis and secretion of bile. B) antibody production. C) synthesis of plasma proteins. D) inactivation of toxins. E) storage of glycogen and iron reserves. Answer: B What is the salivary gland that secretes a watery mixture rich in salivary amylase and buffers and secretes 70% of the saliva? A) mandibular B) sub lingual C) lingual D) sub mandibular E) porotid Which of the following is false about secretions from the salivary glands? A) are mostly water B) help control bacterial populations in the mouth c) help lubricate the oral cavity and its contents d) contain enzymes for the digestion of lipids. The human liver is composed of ___ lobe(s). A) one b) two C) three D) four E) two large and four small

Explanation / Answer

44.E

Explanation 44: Other four are smoothe muscles which are not in voluntary control, how ever outer anal sphincter is our control. As you have experienced when passing the stool you can voluntarily stop or segment the semi solid stool on your will.

45. B

Explanation 45: Antibody production takes place by B cells or B lymphocyte cells (a form of WBC)

46. D

Explanation 46: Submandibular 65-70%, Parotid glands secrete approx 20%, Sublingual gland approx 5%, and rest by other glands

47. A

Explanation 47: It contains amylase, digestive enzymes and water

48. D

Explanation 48: Human liver has four lobes - 1. Right lobe, 2. Left lobe, 3. Caudate lobe & 4. Quadrate lobe.

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