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. The outermost layer of the digestive tract, which is composed of a thin layer of areola tissue:

A.

mucosa (mucous membrane)

B.

serosa (mesentery)

C.

muscularis externa

D.

Submucosa

Answer and Explanation

The Correct Answer is B

A. Mucosa (mucous membrane): The mucosa is the innermost layer of the digestive tract, not the outermost. It includes the epithelium, lamina propria, and muscularis mucosae. 

 

B. Serosa (mesentery): The serosa is the outermost layer of the digestive tract in parts where it is covered by peritoneum. It consists of a thin layer of areolar tissue topped by simple squamous epithelium.

 

C. Muscularis externa: The muscularis externa is a layer of muscle in the digestive tract, located beneath the serosa. It is not the outermost layer.

 

D. Submucosa: The submucosa is a layer of connective tissue located between the mucosa and muscularis externa. It is not the outermost layer.
 


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View Related questions

Correct Answer is D

Explanation

A. Estrogen is a hormone involved in the regulation of the menstrual cycle and pregnancy, but it is not the hormone detected by pregnancy tests.

B. Luteinizing hormone (LH) surges just before ovulation but is not the hormone detected by pregnancy tests.

C. Progesterone supports pregnancy by maintaining the uterine lining, but it is not the hormone detected by pregnancy tests.

D. Human chorionic gonadotropin (hCG) is the hormone produced by the placenta shortly after implantation, and it is the hormone detected by pregnancy tests.

Correct Answer is C

Explanation

A. The small intestine absorbs lipids but does not produce HDL (high-density lipoprotein).

B. The pancreas produces enzymes and hormones, but it does not produce HDL.

C. The liver is the primary organ responsible for the synthesis of HDL. HDL is involved in reverse cholesterol transport, carrying cholesterol from tissues back to the liver.

D. The gallbladder stores and concentrates bile but does not produce HDL.

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