Smooth and Cardiac Muscle

Question 1

give smooth muscle basics

Answer 1

1. continuous contraction of low force
2. contraction occurs independently of innervation
3. Influence of ANS and hormones
4. Elongated, small, spindle shaped nucleus
5. Bounded together by fasciculi
6. Unstriated

Question 2

Give notes on smooth muscle contractile apparatus

Answer 2

1. 3 filaments- thick myosin, thin action and intermediate
2. No sarcomere pattern (no z line)
3. Dense body
4. diagonal orientation

Question 3

What do caveolae often associate with?

Answer 3

t-tuble system

Question 4

What is found in intercalated discs?

Answer 4

fascia adherens
desmosomes
gap junctions