Daily NEET MCQ- September 1, 2022 - NEET MCQ

In the duodenum, glands are present in the sub-mucosa. The sub-mucosal layer is formed of loose connective tissue containing nerves, blood, and lymph vessels.

Muscularis layer is formed by smooth muscles which are usually arranged into an inner circular and an outer longitudinal layer. An oblique muscle layer may be present in some regions.

Mucosal epithelium has goblet cells which secrete mucus that helps in lubrication. All four layers show modifications in different parts of the alimentary canal.

Vermiform appendix is a narrow finger-like tubular projection that arises from the caecum of the large intestine. The vermiform appendix is a vestigial organ in the human body.

Small intestine is distinguishable into three regions, a ‘C’ shaped duodenum, a long coiled middle portion jejunum, and highly coiled ileum.

Henri Becquerel discovered that elements emit radiation and termed this phenomenon as radioactivity. Later Curie on research found out about α-rays, β-rays and γ-rays. Later Rutherford concluded that α particles are helium nuclei.

Thomson proposed a model of the atom, in which electrons are embedded to make it as the stable electrostatic arrangement and such that positive charge is equally distributed around a sphere. Mass is assumed to be equally distributed. So. it has different names like plum pudding, watermelon and raisin pudding model.

A protozoan living in the digestive tract of a flea living on a dog is an example of Hyper-parasitism. It is also known as secondary or epi-parasite. It is a relationship in which one parasite feeds on another parasite which in turn feeds on its host.

A relationship in which one parasite feeds on another parasite which in turn feed on its host is called epi-parasite. These are also known as secondary or hyper parasites. An example is a bacterium in an insect’s gut that feeds on cattle.

Sacculina is a genus of barnacles that resides inside the gut of a crab. It is a parasite that shows adverse effects on crabs such as it hinders the normal metabolism of crab and also reduces its reproduction capacity.