Question

Mention 2 structural features of small intestine which add to the absorptive cavity

Answer 1

1)
1.In small intestine villi increases the surface area for absorption.

2. The small intestine is LONG- this ensures food remains in the small intestine long enough for the products of digestion to be fully absorbed into the bloodstrem.

2)
1.Pancreas is the gland which secretes digestive enzymes as well as hormones. It sectretes Pancreatic Juice( containing Amylase, Trypsin and Lipase).

2. pancreas is both an endocrine and an exorcise gland.

3)

These terminal electron acceptors have smaller reduction potentials than O2, meaning that less energy is released per oxidized molecule. Anaerobic respiration is, therefore, in general energetically less efficient .
examples:ameoba,single-celled organisms break Don in to pyruvate in to ethanol releasing co2 in this process.