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Digestion and Absorption

Multiple Choice Questions

21.

Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system

Amphibia
Reptilia
Osteichthyes
Aves

22.

Identify the correct set, which shows the name of the enzyme from where it is secreted and the substrate upon which it acts.

Ptyalin – Intestine – Maltose
Ptyalin – Pancreas – Lipid
Pepsin – Stomach wall – Caesin
Chymotrypsin – Salivary gland – Lactose

23.

Oxyntic cells secrete

HCl
Trypsin
NaOH
Pepsinogen

24.

Vitamin-B₁₂ is absorbed primarily in the

Stomach
Duodenum
Jejunum
ileum

25.

The layer of cells that secrete enamel of the tooth is

Dentoblast
Ameloblast
Osteoblast
Odontoblast

26.
Kupffer cells are present in

liver

small intestine

pancreas

thyroid gland

liver

Kupffer cells are the phagocytic cells present over the lining of sinusoids in liver. They destroy WBCs and RBCs and bacteria.

Small intestine consists of paneth cells and Argentaffin cells secreting digestive enzymes. They are present on tubular pits of intestinal glands known as crypts of Lieberkuhn.

Pancreas consists of groups of cells, islets of Langerhans which contain 4 types of cells- Alpha cells, Beta cells, Delta cells and F- cells.

Thyroid gland consists of spherical sacs called thyroid follicles. Its wall is made up of two types of cells- Principal cells and Parafollicular cells.