BIO 175 FINAL EXAM Questions with
Answers 100% Solved
characteristics of cartilage & 3 types -avascular
-matrix firm gel
1. hyaline
2. elastic
3. fibro
tissue membranes form physical barriers by lining or covering body surfaces
-mucous, serous, cutaneous, synovial
function of muscle tissue contraction
3 types of muscle tissue *skeletal*-striated, voluntary, skeletal muscles
*cardiac*-striated, involuntary, heart
*smooth*- nonstriated, involuntary, walls of bv's
,function of nervous tissue movement of electrical impulses from one region of the body to
another
6 functions of the skeletal muscular system 1. produce movement
2. maintain posture & body position
3. support soft tissues
4. guarding body entrances and exits
5. maintaining body temperature
6. storing nutrients
muscle fiber a single muscle cell
tendon collagenous band that connects a skeletal muscle to an element of the skeleton
aponeurosis broad tendinous sheet
muscle fiber cell membrane & cytoplasm sarcolemma; sarcoplasm
,transverse tubules narrow tubes whose surfaces are continuous with the sarcolemma and
extend deep into the sarcoplasm
sarcoplasmic reticulum organelle of the muscle fiber that stores calcium
2 kinds of protein myofilaments found in myofibrils -actin
-myosin
thick myosin filaments -contain titin
-10-12 nm diameter
-300 myosin molecules twisted around each other
-long tail bound to other myosin molecules
-free head towards nearest thin filament
thin actin filaments -contain tropomyosin but lack troponin
-5-6nm diameter
-4 main proteins
, sliding filament theory theory that actin filaments slide toward each other during muscle
contraction, while the myosin filaments are still
neuromuscular junction synapse between neuron and muscle
axon terminal end of axon
neurotransmitter chemical messengers that cross the synaptic gaps between neurons
synaptic cleft a gap into which neurotransmitters are released from the axon terminal
motor end plate the flattened end of a motor neuron that transmits neural impulses to a
muscle
neurotransmitter in muscle contraction ach
role of ach in contraction binds to receptors in the motor end plate, initiating a change in
ion permeability that results in the end-plate potential
Answers 100% Solved
characteristics of cartilage & 3 types -avascular
-matrix firm gel
1. hyaline
2. elastic
3. fibro
tissue membranes form physical barriers by lining or covering body surfaces
-mucous, serous, cutaneous, synovial
function of muscle tissue contraction
3 types of muscle tissue *skeletal*-striated, voluntary, skeletal muscles
*cardiac*-striated, involuntary, heart
*smooth*- nonstriated, involuntary, walls of bv's
,function of nervous tissue movement of electrical impulses from one region of the body to
another
6 functions of the skeletal muscular system 1. produce movement
2. maintain posture & body position
3. support soft tissues
4. guarding body entrances and exits
5. maintaining body temperature
6. storing nutrients
muscle fiber a single muscle cell
tendon collagenous band that connects a skeletal muscle to an element of the skeleton
aponeurosis broad tendinous sheet
muscle fiber cell membrane & cytoplasm sarcolemma; sarcoplasm
,transverse tubules narrow tubes whose surfaces are continuous with the sarcolemma and
extend deep into the sarcoplasm
sarcoplasmic reticulum organelle of the muscle fiber that stores calcium
2 kinds of protein myofilaments found in myofibrils -actin
-myosin
thick myosin filaments -contain titin
-10-12 nm diameter
-300 myosin molecules twisted around each other
-long tail bound to other myosin molecules
-free head towards nearest thin filament
thin actin filaments -contain tropomyosin but lack troponin
-5-6nm diameter
-4 main proteins
, sliding filament theory theory that actin filaments slide toward each other during muscle
contraction, while the myosin filaments are still
neuromuscular junction synapse between neuron and muscle
axon terminal end of axon
neurotransmitter chemical messengers that cross the synaptic gaps between neurons
synaptic cleft a gap into which neurotransmitters are released from the axon terminal
motor end plate the flattened end of a motor neuron that transmits neural impulses to a
muscle
neurotransmitter in muscle contraction ach
role of ach in contraction binds to receptors in the motor end plate, initiating a change in
ion permeability that results in the end-plate potential
