Muscle tissue

Question 1

Function of muscular tissue
pbm - cwb, maj
sbp - ex, s, s, stj
sams - sis, b, bv, h
ph - t -apomc ex. sw

Answer 1

produce body movement - coordinate with bones, muscles and joints
stabalize body positions, ex. sitting, standing, stabalize joints
store and move substances, sphincters in stomach, bladder, blood vessels, heart
produce heat - thermogenises, product of muscle contration ex shivering, sweating

Question 2

Properties of muscle tissue
ee - mftrtap ex. manc
c - mttcfbp
e - aomtts ex. sahw
e - mttrtolasac

Answer 2

electrical excitability - muscle fibers to respond to action potential ex. muscle and nerve
contractility - muscle tissue to contract forcefully by potential
extensibility - muscle tissue to stretch ex. stomach and heart wall
elasticity - muscle tissue to return to original length and shape after contraction

Question 3

Microscopic structure and function of skeletal muscle fiber cell.
smbcob (b) cbttts
taa
paocfateom

eotctl
emasbe
ms (b) asbp
mf (rf) asb e

Answer 3

skeletal muscle bundle consists of body (belly) connected by tendons to the skeleton
tendons are avascular
parallel arrangement of collagen fibers at the ends of muscle

extension of three connective tissue layers
entire muscles surrounded by epimysium
muscle fascicles (bundles) surrounded by perimysium
muscle fibers (reticular fibers) are surrounded by endomysium

Question 4

Microscopic structure and function of skeletal muscle fiber cell.
m - caladb
s - pmomfc
s - comf
t t - fctctap
sr - ffc, steroc
tc - deofsr, sca2+

Answer 4

myofibrils - contain alternate light and dark band
sarcolemma - plasma membrane of muscle fiber cells
sarcoplasm - cytoplasm of muscle fiber
t tubules - fluid filled channels similar to endoplasmic reticulum of cell
terminal cisternae - dilated end of SR stores ca2+

Question 5

Name and examples of the contractile, regulatory, and structural proteins and their functions.
cp - am
rp - tt
sp - htfipagtmee ex. ml, zd

Answer 5

contractile protein - actin, myosin
regulatory protein - troponin and tropomyosin
structural protein - hold thing filaments in proper alignment give the myofibril elasticity and extensibility, m line, z disc

Question 6

Contractile protein
m
mcotf
mptcceime

a
mcotf
ctrp, tat

Answer 6

Myosin
major component of thick filaments 16nm diameter and 1-2 um long
motor protein that converts chemical energy into mechanical energy

actin
major components of thin filaments
contrain regulatory proteins, tropomyosin and troponin

Question 7

Regulatory protein
tat
rtibaam

Answer 7

tropomyosin and troponin

regulate interaction between actin and myosin