Describe the common tissues found in the organs of the intestinal tract. (4 points) describe the common tissues and structures found in accessory organs. (4 points) describe these structures and their function in the pancreas: (6 points) acinar cells that secrete enzymes or bicarbonate islet cells that secrete insulin or glucagon blood vessel describe these structures and their function in the small intestine: (6 points) villi smooth muscle intestinal glands

1)

Tissues in the intestinal tract made up of loose connective tissues

Mucosa: It playa a role in the secretion of lubricants that lubricate and protect the intestinal wall from digestive enzymes.

Submucosa: It contains nerves, blood vessels and elastic fibers with collagen. It maintains the shape of the intestine by stretching.

Serosa: During digestive movements, it secretes lubricating fluid and prevents from frictional damages.

2)

Accessory digestive organs have common specialized cells, ducts, and secrete digestive hormones to help in digestion.

3)

Acinar cells that secrete and transport enzymes or bicarbonate into the duodenum for the digestion of the food.

Islet cells that secrete insulin or glucagon that increase the glucose level in the blood.

Blood vessels provide oxygen and nutrients for tissue growth and maintenance.

4)

Villi help to absorb digested food.

Smooth muscle moves food through the digestive tract.

Intestinal glands help in digestion and absorption by releasing hormones.

Acinar cells are basic units of the exocrine pancreas, islets are clusters of cells, and blood vessels maintain pancreatic islets. Villi are projections of the small glandular intestine, whose contraction is due to smooth muscle.

In conclusion, acinar cells are units of the exocrine pancreas, islets are clusters of cells, and blood vessels maintain pancreatic islets. Villi are projections of the small glandular intestine, whose contraction is due to smooth muscle.

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i think that d. wind is the answer.   i missed the question when i answered a. currents.

transcription is a process in which information is rewritten. it is something our cells must do, in a more specialized and narrowly defined way. in biology, transcription is the process of copying out the dna sequence of a gene in the similar alphabet of rna. it needs to happen in the nucleus because that's where the dna is. dna is always inside the nucleus unless the cell is dividing.

transcription is the first step in gene expression, which involves copying a gene's dna sequence to make an rna molecule. transcription is performed by rna polymerases. it has three stages: initiation, elongation, and termination. rna molecules must be processed after transcription in eukaryotes.

explanation:

long version:

the protein synthesis consists two processes which are, transcription and translation. transcription takes place in the nucleus. it uses dna as a template to make an rna molecule. rna then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. transcription is the first part of the central dogma of molecular biology: dna → rna. it is the transfer of genetic instructions in dna to messenger rna (mrna). during transcription, a strand of mrna is made that is complementary to a strand of dna.  

these three stages are:

  initiation: in which   is the beginning of transcription.occuring when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

    elongation: in which is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

    termination: in which is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.