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Histology > Nervous tissue, NMJ and connective tissue > Flashcards

Nervous tissue, NMJ and connective tissue Flashcards

1
Q

What are the types of neurones?

A
  1. Multipolar: Has more than 2 processes form body (e.g. motor neurone).
  2. Pseudounipolar: Single process leaves cell body to divide into 2 branches (e.g. sensory neurone)
  3. Bipolar: 2 processes leaving the cell body (e.g. interneurone)
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2
Q

What substance is contained within the cell bodies of multipolar neurones?

A

Nissl substance

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3
Q

What are satellite cells?

A

Glial cell providing sypport to cell bodies in gangia.

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4
Q

What are the differences between sensory and sympathetic ganglia?

A
  • Sensory cell bodies are much bigger than sympathetic cell bodies.
  • Satellite cells are much more regularly distributed in sensory ganglia around cell bodies compared to sympathetic ganglia.
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5
Q

What are the layers of a nerve trunk?

A
  • Endoneurium: Support tissue containing blood vessels surrounding individual axons.
  • Perineurium: Dense layer of connective tissue surrounding each nerve trunk.
  • Epineurium: Loose layer of connective tissue surrounding numerous nerve trunks in a nerve.
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6
Q

What is the length of axon covered by 1 Schwann cell?

A

~1 mm

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7
Q

What is the typical length of a node of Renvier?

A

0.5 µm

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8
Q

What is connective tissue?

A

Tissues of mesodermal origin which provides structural and metabolic support for other tissues and organs of the body.

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9
Q

What types of cells are found in connective tissue?

A
  • Fibroblasts; Secretes ECM in most cells.
  • Adipocytes: Stores fat.
  • Chondroblasts: Secretes ECM in cartilage.
  • Osteoblasts: Secretes ECM in bone.
  • Myofibroblasts: Secretes ECM and contracts.
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10
Q

What are the components of ECM?

A
  1. Collagen fibres
  2. Elastic fibres
  3. Ground substance
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11
Q

What are the main proteins found in ECM?

A
  1. Collagen
  2. Elastin
  3. Fibronectin (glycoprotein)
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12
Q

What are the types of connective tissue?

A
  1. Loose connective tissue (e.g. gut epithelium)
  2. Dense connective tissue (e.g. nerve trunk sheaths, renal capsule)
  3. Elastic connective tissue: (e.g. alveoli, skin, arteries, bladder)
  4. Cartilage and bone
  5. Fat
  6. Blood
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13
Q

What are th types of fat cells?

A
  1. White fat
  2. Brown fat
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14
Q

How many types of collagen are there?

A

4

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15
Q

What are the most common types of collagen?

A

Type 1 collagen

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16
Q

What are the contents of ground substance?

A
  1. Glycosaminoglycans
  2. Proteoglycans
  3. Glycoproteins
17
Q

What is hyaline cartilage made up of?

A
  1. Chondrocytes (in lacunae)
  2. Collagen
  3. Proteoglycans
18
Q

What is bone made up of?

A
  1. Osteocytes (in lacunae
  2. Hydroxyapatite
  3. Collagen
  4. Proteoglycans

Histology (9 decks)

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