Compare and Contrast Muscle Types

Does smooth muscle require atp

Yes

Does skeletal muscle require atp

Yes

Does cardiac muscle require atp

Yes

Does skeletal muscle use actin and myosin

Yes

Does smooth muscle use actin and myosin

Yes

Does cardiac muscle use actin and myosin

Yes

Does skeletal muscle use troponin and tropomyosin

Yes

Does smooth muscle use troponin and tropomyosin

No

Does cardiac muscle use troponin and tropomyosin

Yes

Is skeletal muscle neurogenic, myogenic, or both

Neurogenic

Is smooth muscle neurogenic, myogenic, or both

Both

M = single unit

N = multi unit

Is cardiac muscle neurogenic, myogenic, or both

Myogenic

Is skeletal muscle voluntary or involuntary

Voluntary

Is smooth muscle voluntary or involuntary

Involuntary

Is cardiac muscle voluntary or involuntary

Involuntary

Are cells connected with gap junctions / CAN they be - skeletal muscle

No

Are cells connected with gap junctions / CAN they be - smooth muscle

Can be

Single unit = yes

Multi unit = no

Are cells connected with gap junctions / CAN they be - cardiac muscle

Yes

Where does calcium come from to cause contraction - ECF, ICF, or both - skeletal

ICF

Where does calcium come from to cause contraction - ECF, ICF, or both - smooth

Mostly ECF

Where does calcium come from to cause contraction - ECF, ICF, or both - cardiac

Both

After calcium enters the skeletal muscle, describe the sequence of events that lead to the formation of the cross bridge

1. Calcium binds to troponin

2. Troponin moves tropomyosin off the binding site

3. Cross bridge forms

After calcium enters the smooth muscle, describe the sequence of events that lead to the formation of the cross bridge

1. Calcium binds to calmodulin

2. Calmodulin activates myosin kinase

3. MK adds a phosphate to myosin

4. Cross bridge forms

After calcium enters the cardiac muscle, describe the sequence of events that lead to the formation of the cross bridge

1. Calcium binds to troponin

2. Troponin moves tropomyosin off the binding site

3. Cross bridge forms