CTL week 5

Question 1

what are 3 types of muscle tissue

Answer 1

Skeletal
Cardiac
Smooth

Question 2

muscular tissue is used for?

hint: BMGP

Answer 2

body movement
maintain posture
generate heat
provide protection

Question 3

Skeletal muscle tissue consist of long ____?

Answer 3

Skeletal muscle tissue consist of long ____?: cylindrical, striated fibres.

Question 4

Are Cardiac muscle Tissue multinucleated or single-nucleated?

Answer 4

Are Cardiac muscle Tissue multinucleated or single-nucleated?

Answer: single-nucleus called “Cardiac Myocytes”

Question 5

intercalated Discs have which junctions in cardiac muscle cells?

Answer 5

Intercalated Discs have Desmosomes and Gap Junctions

Question 6

Muscular tissue properties include ?

hint: 4 things

Answer 6

Muscular tissue properties include ?

1. electrical excitability via action potential. usually done throught chemical stimuli - neurotransmitter-.
   note: cardiac muscle has an autorhythmic electrical signal
2. Contractility (pull forcefully)
3. Extensibility (stretch within limits)
4. Elasticity (return to original length)

Question 7

Which layer is around what?

Epimysium

Perimysium

Endomysium

Answer 7

Which layer is around what?

Epimysium: around the whole muscle. Dense Irregular CT

Perimysium: around muscle bundle. Dense Irregular CT

Endomysium: around muscle fibre. Reticular CT

Question 8

muscle fibres are made from fusion of many ____?

Thus they have 4 characteristics which are?

Answer 8

muscle fibres are made from fusion of many? Myoblasts
Thus they have 4 characteristics which are?
- Large (due to fusion)
- multinucleated (at periphery)
- Striated
- Packed with myofibrils

Question 9

Purkinje Fibres is what?

Answer 9

Purkinje Fibres is what? Specialized conductive myocardial cels with few myofibrils, alow the cardiac muscle of the ventricles to contract as a coordinated unit.

Question 10

what is the:
shape
junction
function 
of smooth muscle tissue?

Answer 10

what is the shape, junction, and function of smooth muscle tissue?

Answer: 
shape = spindle-shaped 
junction = gap junction 
function = motion (constrict blood vessel, push food in GI.

Question 11

Fascicles are what?

Answer 11

Fascicles are what?

Answer: bundles of muscle fibres.