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Which of the following is involved in the production of new blood cells ?

A. Adipose cell

B. Bone marrow

C. Liver

D. Matrix

Correct Answer :

B. Bone marrow


Bone marrow is the flexible tissue in the interior of bones. In humans, red blood cells are produced by cores of bone marrow in the heads of long bones in a process known as haematopoiesis. Bone marrow is also a key component of the lymphatic system, producing the lymphocytes that support the body's immune system.

Related Questions

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Which of the following animal's sensory system does not has eyes but does possess light and touch sensitive organs (receptor cells) to distinguish the light intensities and to feel the vibrations in the ground?

A. Frog

B. Snake

C. Earthworm

D. Cockroach

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4

Match the epithetial tissue given in column-I with its location given in column-II and choose the correct option.
Column IColumn II
(Epithelial tissue)(Location)
A. CuboidalI. Epidermis of skin
B. CiliatedII. Inner lining of blood vessels
C. ColumnarIII. Inner surface of gall bladder
D. SquamousIV. Inner lining of fallopian tube
E. KeratinizedV. Lining of pancreatic duct squamous

A. A V; B IV; C II; D III; E I

B. A III; B IV; C V; D II; E I

C. A V; B IV; C III; D II; E I

D. A III; B IV; C V; D I; E II

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Cockroaches are brown or black bodied animals that are included in class _______ of phylum _______.

A. reptilia; annelida

B. insecta; arthropoda

C. insecta; annelida

D. reptilia; arthropoda

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4

The following figure shows the extarnal features of cockroach with few structures labelled as A, B, C, D, & E. Identify A to E .

A. A- Mesothorax, B-Pronotum, C-Metathorax, D-Tegmina, E-Anal style

B. A- Pronotum, B-Metathorax, C-Mesothorax, D-Tegmina, E-Sterna

C. A- Pronotum, B-Mesothorax, C-Metathorax, D-Tegmina, E-Anal cerci

D. A- Pronotum, B-Mesothorax, C-Metathorax, D-Tegmina, E-Anal style

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Neuroglia are

A. excitable cells of neural tissue.

B. supporting and non-excitable cells of neural tissue.

C. two to three times in volume of neural tissue.

D. protective and excitable cells of neural tissue.

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4

Hair present in the skin are

A. epidermal in origin and made of dead cells.

B. epidermal in origin and made of living cells.

C. dermal in origin and made of living cells.

D. dermal in origin and made of dead cells.

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Gizzard (proventriculus) in cockroach lies between

A. oesophagus and stomach

B. crop and mesenteron

C. mesenteron and ileum

D. oesophagus and crop

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The fibres of which of the following muscles are fusiform and do not show striations

A. Skeletal muscles

B. Cardiac muscles

C. Both (a) and (b)

D. Smooth muscles

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4

Cartilage tissues are likely to be slow in healing following an injury because

A. cartilage cells cannot reproduce.

B. they lack direct blood supplies.

C. the intercellular material is missing.

D. cartilage cells are surrounded by fluids.

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4

A student was given a sample of two tissues. He observes the tissues under the microscope and draws their figures (1 and 2) as shown below.

Identify the tissues (1 and 2).

A. 1: Columnar cells bearing cilia; 2: Unicellular glandular epithelium

B. 1: Cuboidal cells bearing cilia; 2: Multicellular glandular epithelium

C. 1: Compound cells bearing cilia; 2: Unicellular glandular epithelium

D. 1: Columnar cells bearing cilia; 2: Multicellular glandular epithelium

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4

A student was given a specimen to identify on the basis of the characteristics given below.
  1. They are metamerically segmented.
  2. Presence of closed circulatory system.
  3. They have circular and longitudinal muscles for locomotion.

Identify the specimen.

A. Frog

B. Pheretima

C. Cockroach

D. Rabbit

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4

The only type of cell seen in a tendon is

A. muscle fibres

B. reticular cells

C. collagenous cells

D. fibroblasts

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Epithelial tissue is distinguished from connective tissue, muscular, or nervous tissue by its

A. large extracellular matrix.

B. contractibility.

C. ability to carry action potentials.

D. basement membrane.

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4

The secretions of endocrine glands are released directly

A. into the skin surface

B. into the blood stream

C. into a gland duct

D. into the brain tissue

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4

The frog never drinks water but absorbs it through one of its respiratory organ. Identify the organ.

A. Skin

B. Lung

C. Buccal cavity

D. None of the above.

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4

What are the three basic components of connective tissues?

A. Ground substance, cells and basement membrane

B. Cartilage, intercellular matrix and serum

C. Cells, protein fibers and ground substance

D. Collagen, elastin and reticular fibers

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4

The supportive skeletal structures in the human external ears and in the nose tip are examples of

A. ligament

B. areolar tissue

C. bone

D. cartilage

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4

When cardiac muscle cells are damaged by a heart attack, they are usually replaced by

A. connective tissue cells

B. new smooth muscle cells

C. new cardiac muscle cells

D. epithelial cells

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4

Identify the figure with its correct function Fig :. Adipose connective tissue

A. Areolar connective tissue Serves as a support framework for epithelium.

B. Adipose tissue Store fats and act as heat insulators.

C. Dense regular tissue Provide flexibility.

D. Dense irregular tissue Provide strength and elasticity.

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4

The given figure shows the digestive system of cockroach with few structures marked as A, B, C and D. Identify structures A to D.

A. A-Gizzard, B-Crop, C-Hepatic caecae, D-Malpighian tubules

B. A-Crop, B-Gizzard, C-Hepatic caecae, D-Malpighian tubules

C. A- Crop, B-Gizzard, C-Malpighian tubules, D-Hepatic caecae

D. A- Gizzard, B-Crop, C-Malpighian tubules, D-Hepatic caecae

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4

Statement 1 : Intercalated discs are important regions of cardiac muscle cells.
Statement 2 : Intercalated discs function as boosters for muscle contraction waves.

A. Statement-1 and statement-2 are true and statement-2 is a correct explanation for statement-1.

B. Statement-1 and statement-2 are true and ttatement-2 is not a correct explanation for statement-1

C. Statement-1 is true, and statement-2 is False

D. Both the statements are false.

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4

What will happen if ligaments are cut or broken?

A. No movements at joints.

B. Bones will become fixed.

C. Bones will become unfixed.

D. Bone will move freely at joints.

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Identify figures-I and II.

Figure I Figure II

A. Dense regular Dense irregular connective tissue, connective tissue

B. Loose irregular Loose regular connective tissue, connective tissue

C. Adipose tissue, Specialized connective tissue

D. Connective tissue Areolar tissue proper

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4

Read the following statements and answer the question.
  1. They have a hard and non-pliable ground substance rich in calcium salts and collagen fibres.
  2. They support and protect softer tissues and organs.
  3. Osteocytes are present in the spaces called lacunae.
  4. They also interact with skeletal muscles attached to them to bring about movements.

Which of the following type of tissue is being described by above statements ?

A. Cartilage

B. Bone

C. Blood

D. Neurons

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4

A student was given a sample of tissue. He observes and concludes the following characters.
  1. The cells are composed of a single layer of tall and slender cells.
  2. Their nuclei are located at the base.
  3. Free surface may have microvilli.
  4. It is found in the lining of stomach and intestine
  5. They help in secretion and absorption.

Based on the above features identify the epithelium.

A. Cuboidal epithelium

B. Columnar Epithelium

C. Squamous epithelium

D. Glandular epithelium

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Nervous tissue cells that play several supporting roles but do not transmit impulses are called

A. glial cells

B. dendrites

C. nerve cells

D. neurons

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Which of the following statement is incorrect regarding cuboidal epithelium ?

A. It is an epithelial tissue.

B. It is composed of a single layer of cube-like cells.

C. They are found in the walls of blood vessels and air sacs of lungs.

D. Secretion and absorption are the main functions of these tissue.

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4

Which of the following statement is correct regarding Female reproductive system of earthworm ?

A. It consists of two large ovaries, lying laterally in the 6th 7th abdominal segments.

B. Each ovary is formed of a group of five ovarian tubules or ovarioles, containing a chain of developing ova.

C. A pair of spermatheca is present in the 5th segment which opens into the genital chamber.

D. None of the above

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Which of the following type of tissue is being described by the given statements ?
  1. They are named because of their special function of linking and supporting other tissues/organs of the body.
  2. They include cartilage, bone, adipose and blood.
  3. They provide strength, elasticity and flexibility to the tissue.
  4. They also secrete modified polysaccharides, which accumulate between cells and fibres and act as matrix.

A. Epithelial tissue

B. Connective tissue

C. Muscle tissue

D. Neural tissue

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4

Which of the following statement(s) is/are correct regarding respiratory system of cockroach ?
  1. It consists of a network of trachea, that open through 12 pairs of small holes called spiracles present on the lateral side of the body.
  2. Thin branching tubes carry oxygen from the air to all the parts.
  3. The opening of the spiracles is regulated by sphincters.
  4. Exchange of gases take place at the tracheoles by diffusion.

A. Only (i)

B. (i), (ii) and (iii)

C. (ii), (iii) and (iv)

D. All of these