NCERT Part 1 Flashcards

NCERT facts and typical statements, etc.

1
Q

A group of similar cells along with intracellular substances perform a specific function. This organisation is called tissue. The said compositional cells are similar across what dimensions?

A

Origin, form and function.

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2
Q

Simple and compound epithelium- one function and difference each.

A

Simple: made up of a single layer of cells and functions as lining for body cavities, ducts and tubes.

Compound: two or more layers and mainly protective in functioning.

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3
Q

Simple epithelium types based on structural modification

A

THREE

Squamous, cuboidal, columnar

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4
Q

Commonly found in ducts of glands and tubular parts of nephron in kidneys

A

Cuboidal

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5
Q

Epithelium of the PCT of the nephron of kidney has?

A

Microvilli. BRUSH BORDERED CUBOIDAL.

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6
Q

Lining of stomach and intestine

A

Columnar

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7
Q

Inner surfaces of hollow organs like bronchioles and Fallopian tubes

A

Ciliated

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8
Q

Some cuboidal or columnar cells get specialised for secretion

A

Glandular epithelium
Two types:
Unicellular- isolated goblet cells which line the alimentary canal
Multicellular- consisting of cluster of cells (eg salivary)

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9
Q

Glands are classified as exocrine or endocrine on the basis of?

A

Mode of pouring their secretion

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10
Q

Exocrine glands secrete

A

Mucus, saliva, ear wax, milk, digestive enzymes, other cell products
(Released via ducts/tubes)

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11
Q

Endocrine glands secrete

A

Hormones, without ducts and directly into the fluid (blood/lymph) bathing the tissue

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12
Q

Compound epithelium examples

A

Dry surface: skin
Moist surface: 1)buccal cavity
2) pharynx
3) inner lining of salivary glands
4) pancreatic ducts

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13
Q

Cover the dry surface of skin

A

Compound epithelium

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14
Q

Cover the moist surface of buccal cavity, pharynx, inner lining of salivary gland and pancreatic ducts

A

Compound

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15
Q

Junction that Stops substance from leaking across a tissue

A

Tight junction

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16
Q

Junction that Performs cementing to keep neighbouring cells together

A

Adhering

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17
Q

Junction that Facilitates cell communication

A

Gap junction

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18
Q

Gap junction facilitates the rapid transfer of

A

Ions, small molecules and sometimes even large molecules

19
Q

Which tissue LINKS and SUPPORTS other tissues/organs?

A

Connective

20
Q

Connective tissue range from - to - ?

A

Soft to specialised

21
Q

Name specialised connective tissues

A

Cartilage, bone, adipose and blood

22
Q

What’s the most widely distributed tissue in the body of complex animals

A

Connective

23
Q

Statement: In ALL connective tissues, cells secrete fibres of structural proteins (collagen/elastin)
True/false

A

False. Blood is an exception.

24
Q

What provides strength, elasticity and flexibility to the connective tissues?

A

FIBRES. (Collagen/Elastin)

25
Q

Apart from fibres, what else do cells of connective tissues secrete?

A

MODIFIED POLYSACCHARIDES. They accumulate between cells and fibres and act as matrix (ground substance).

26
Q

Connective tissue classified into

A

THREE TYPES

1) Loose
2) Dense
3) Specialised

27
Q

Connective tissue serves as support framework for epithelium

A

Areolar tissue present beneath the skin

28
Q

Apart from Areolar, what other connective tissue is found beneath the skin

A

Adipose

29
Q

Layer of CT beneath skin contains what

A

Areolar tissue has Fibroblasts, macrophages, mast cells

30
Q

Where does adipose get its fat?

A

Excess of nutrients which are not used immediately are converted into fats

31
Q

Cells and fibres loosely arranged in a semi fluid ground substance Vs completely packed fibres and fibroblasts

A

Loose and dense CT

32
Q

Which dense regular CT connects muscle to bone

A

TENDON

33
Q

Which dense regular CT connects bone to bone

A

LIGAMENT

34
Q

Tendons (muscle to bone) and ligaments (bone to bone) are examples of

A

Dense regular CT

35
Q

In which CT collagen fibres are present in rows between many parallel bundles of fibres?

A

Dense Regular/ Tendon or Ligament

36
Q

Which fibre is majorly found in dense irregular CT

A

Collagen

37
Q

Which CT is present in skin

A

Dense irregular

38
Q

Name the various types of specialised connective tissues

A

Cartilage, bone, blood

39
Q

Connective tissues range from soft to specialised such as

A

Adipose
Cartilage
Bone
Blood

40
Q

Which CT has a solid, pliable intercellular material which resists compression

A

Cartilage

41
Q

Which CT has a hard and non pliable intracellular material

A

Bone

42
Q

Matrix in the small cavities of cartilage is secretes by

A

The cells inhabiting these small cavities, chondrocytes.

43
Q

Most cartilages in embryos of all animals are replaced by bones in adults. True/False

A

False. Vertebrate embryos only.