Structural organisation in Animals

Question 1

What are the exceptions of the mesodermal origin of muscular tissue?

Answer 1

Iris of eye and myoepithelial cells

Question 2

What is the Epimysium and Perimysium of muscle cells made of?

Answer 2

White fibre connective tissue

Question 3

Examples of Skeletal muscles -

Answer 3

Limbs, face, tongue, pharynx, neck interior and 1/3rd of the oesophagus

Question 4

Examples of Smooth muscles -

Answer 4

2/3rd part of oesophagus, visceral glands

Question 5

Examples of Cardiac muscles -

Answer 5

Wall of Heart

Question 6

Examples of multi-unit smooth muscle -

Answer 6

Large blood vessels, arrector pili

Question 7

Examples of single-unit smooth muscle -

Answer 7

Hollow visceral organs, stomach, urinary bladder

Question 8

Exception of origin of nervous tissue -

Answer 8

Microglial cells, mesodermal

Question 9

Origin of muscle cells -

Answer 9

Mesodermal

Question 10

Origin of nervous tissue -

Answer 10

Ectodermal

Question 11

Examples of Myelinated nerve fibre -

Answer 11

White matter of CNS

Question 12

Examples of Non-myelinated nerve fibre

Answer 12

Grey matter of CNS

Question 13

Examples of sensory nerves -

Answer 13

Optic nerves, Olfactory nerves, Auditory nerves, acoustic nerves, vestibulocochlear nerves

Question 14

Examples of motor nerves -

Answer 14

Oculomotor nerves, abducens nerve, hypoglossal nerve, spinal accessory nerve

Question 15

Examples of mixed nerve -

Answer 15

Trigeminal nerve, facial nerve, vagus nerve, all spinal nerves

Question 16

What forms the myelin sheath in CNS and PNS?

Answer 16

Oligodendrocytes, Schwann cells

Question 17

What glial cells are phagocytic in nature?

Answer 17

Microglial cells

Question 18

What are the functions of Astrocytes?

Answer 18

Packaging, repair in case Nissl’s granules, blood brain barrier, regulates conduction of nerve impulse at synapse

Question 19

Function of Ependymal cells -

Answer 19

Formation of cerebro-spinal fluid and maintenance of it’s flow