Home
Class 12
BIOLOGY
The following are some statements about ...

The following are some statements about leucocytes. Which of these is incorrect?
I. The most abundant leucocyte is a granulocyte, whereas the least abundant leucocyte is an agranulocyte.
II. The largent leucocyte is a granulocyte, whereas the smallest leucocyte is an agranulocyte.
III. Phagocytic leucocytes may be agranulocyte or granulocyte.
IV. Polymorphonuclear leucocytes are the largest granuocyte, whereas the largest agranulocyte has a kidney-shaped nucleus.

A

I, II and III

B

II and IV

C

III and IV

D

I and II

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

Which of the following is the least and most abundant leucocytes in human blood, respectively ?

Read the following statements and select the right option : I. The spleen is a large bean-shaped organ, which mainly contains lymphocytes and phagocytic cells. II. The principal of vaccination is based on the property of memory of the immune system. III. The graft rejected or failure of organ transplantation is due to cell-mediated immunity . IV. The yellowish fluid colostrum has an abundant amount of lgA antibodies which provide active immunity to newborn babies.

Read the following statements (i) In adults most of the RBCs are produced in the marrow of long bones. (ii) In camel and Llama RBCs are oval. (iii) Foetal RBCs are nucleated and contain a different form of haemoglobin as compared the adults. (iv) Lymphocytes are 6- 70% of the total leucocytic count Select the correct statements

Select the correct statement from the following . I. Bones support and protect softer tissue and organs II. Blood is a fluid connective tissue. III. Cartilage is a type of specialised muscle tissue. IV. The bone marrow found in some bones is the site of production of leucocytes.

How many of the following statements are incorrect ? (i) The shape of the cell may vary with the function they perform. (ii) Nerve cells are some of the longest cells. (iii) The largest isolated single cell is the egg of an ostrich. (iv) Blue-green algae are eukaryotes. (v) Prokaryotic cells are generally smaller and multiply slowly than eukaryotic cells.

Which of the following statements is INCORRECT? I. Human kidneys can produce urine nearly six times more concentrated than the initial filtrate formed. II. An increase in body fluid volume can switch on the osmoreceptors and stimulate ADH. III. Substance like glucose, amino acids, Na^+ , etc., in the filtrate, are reabsorbed actively by the renal tubule whereas the nitrogenous wastes are absorbed by passive transport IV. Each kidney has nearly one million complex tubular structures called nephrons which are the functional units.

A type of granulocyte and agranulocyte (i) are phagocytic cells that destroy foreign organisms entering the body. (ii) secrete histamine, serotonin, heparin, etc., and are involved in inflammatory reactions. (iii) resist infections and are also associated with allergic reactions. (iv) are responsible for the immune responses of the body.

Which of the following statements are incorrect ? (i) Leucocytes disintegrate in spleen and liver (ii) RBCs, WBCs and blood platelets are produced by bone narrow (iii) Neutrophils bring about destruction and detoxification of toxins of proteins origin (iv) Important function of lymphocytes is to produce antibodies.

Select the correct statements regarding the characteristics of acquired immunity. (i) Cell-mediated immunity is responsible for acquired immunity. (ii) It produces a primary response of low intensity. (iii) Active and passive immunity are types of acquired immunity, (iv) Polymorphonuclear leucocytes and natural killer cells are involved in acquired immunity.

Which Statement among the following are CORRECT ? I. The upper surface of the tongue has small projections called papillae, some of which bear taste buds. II. The serosa is the innermost layer of the alimentary canal and is made up of a thin mesothelium ( epithelium of visceral organs ) with some connective tissue . III. The liver is the largest glands of the body weighing about 4.3 to 5 kg in an adult human. IV. During the process of digestion, the stomach stores the food for 2 - 3 hours. (a) I and III (b) II and IV (c) I and IV (d) II and III