BIO 264 EXAMS 3QUESTIONS AND ANSWERS SURE
A+
✔✔Explain the Synaptic Process - ✔✔1. vessicles of NT start in PREst
2. AP arrives --> opens Ca++ channels --> activates molecules --> vesicles exit and
release NTs in synaptic cleft
3. NT's bind to carrier receptors on POSTst --> receptor lets ions through
4. Ions create EPSP or IPSP; POSTst depolarizes or hyperpolarizes
5. Enzymes from SC break down/inactivate NTs
6. PREst reabsorbs/rebuilds NTs
✔✔Troponin C has a ________? - ✔✔calcium-binding site.
✔✔increases sensitivity to neurons of NTs (norepinephrine)-when done 1st, cell reacts
more strongly - ✔✔Neuromodulator
✔✔Name all 8 of the Functions of Muscle Tissue - ✔✔1. Movement
2. posture
3. Respiration
4. Heat generation
5. Communication
6. Constriction of organs/ blood vessels
7. Pumping blood
8. protect internal organs
✔✔Name all 4 of the Properties of Muscle Tissue - ✔✔1. Contractility- ability to shorten
2. Excitability- respond to stimulus
3. Extensibility- ability to be stretched
4. Elasticity- recoil or bounce back to original length
✔✔Name this Muscle:
striated
voluntary
, Multi-nucleated
40% of our weight - ✔✔Skeletal Muscle
✔✔Name this Muscle:
striated
involuntary
Autorhythmic
heart
Uni or bi-nucleated - ✔✔Cardiac Muscle
✔✔Name this Muscle:
visceral
nonstriated
involuntary
Organs
Uni-nucleated
Greatest variety/function
Autorhythmic - ✔✔
✔✔Order these from deepest to superficial
1. Muscle
2. Myofibril
3. Endomysium (inner)
4. Sarcolemma (membrane)
5. Perimysium (middle)
6. Epimysium (outer)
7. Muscle fiber (cell)
8. Myofilaments
9. Fascicle (muscle bundle) - ✔✔8,2,7,4,3,9,5,1,6
✔✔dark areas in sarcomere
Overlap of actin and Myosin strands - ✔✔A Band
✔✔light areas in sarcomere
Actin strands - ✔✔I Band
✔✔divisions between the adjacent sarcomeres
Scaffolding protein - ✔✔Z - Disc
✔✔in the middle of each A band is a lighter zone(no actin) - ✔✔H zone
✔✔each H zone has a darker line ("middle") running right down the middle of the A
band - ✔✔M Line
A+
✔✔Explain the Synaptic Process - ✔✔1. vessicles of NT start in PREst
2. AP arrives --> opens Ca++ channels --> activates molecules --> vesicles exit and
release NTs in synaptic cleft
3. NT's bind to carrier receptors on POSTst --> receptor lets ions through
4. Ions create EPSP or IPSP; POSTst depolarizes or hyperpolarizes
5. Enzymes from SC break down/inactivate NTs
6. PREst reabsorbs/rebuilds NTs
✔✔Troponin C has a ________? - ✔✔calcium-binding site.
✔✔increases sensitivity to neurons of NTs (norepinephrine)-when done 1st, cell reacts
more strongly - ✔✔Neuromodulator
✔✔Name all 8 of the Functions of Muscle Tissue - ✔✔1. Movement
2. posture
3. Respiration
4. Heat generation
5. Communication
6. Constriction of organs/ blood vessels
7. Pumping blood
8. protect internal organs
✔✔Name all 4 of the Properties of Muscle Tissue - ✔✔1. Contractility- ability to shorten
2. Excitability- respond to stimulus
3. Extensibility- ability to be stretched
4. Elasticity- recoil or bounce back to original length
✔✔Name this Muscle:
striated
voluntary
, Multi-nucleated
40% of our weight - ✔✔Skeletal Muscle
✔✔Name this Muscle:
striated
involuntary
Autorhythmic
heart
Uni or bi-nucleated - ✔✔Cardiac Muscle
✔✔Name this Muscle:
visceral
nonstriated
involuntary
Organs
Uni-nucleated
Greatest variety/function
Autorhythmic - ✔✔
✔✔Order these from deepest to superficial
1. Muscle
2. Myofibril
3. Endomysium (inner)
4. Sarcolemma (membrane)
5. Perimysium (middle)
6. Epimysium (outer)
7. Muscle fiber (cell)
8. Myofilaments
9. Fascicle (muscle bundle) - ✔✔8,2,7,4,3,9,5,1,6
✔✔dark areas in sarcomere
Overlap of actin and Myosin strands - ✔✔A Band
✔✔light areas in sarcomere
Actin strands - ✔✔I Band
✔✔divisions between the adjacent sarcomeres
Scaffolding protein - ✔✔Z - Disc
✔✔in the middle of each A band is a lighter zone(no actin) - ✔✔H zone
✔✔each H zone has a darker line ("middle") running right down the middle of the A
band - ✔✔M Line
