ULM Lab 7 Information

Describe Skeletal Muscle

Multinucleated, Striated, Voluntary and has Cylindrical and Parallel Fibers

Describe Cardiac Muscle

1 (can sometimes have 2) nucleus, striated, involuntary, branching fibers, and intercalated disks

Describe Smooth Muscle

1 nucleus, nonstriated, involuntary, and spindle-shaped fibers

Sarcomere

The smallest unit of skeletal muscle capable of contracting that span from Z disc to Z disc

T/F Z discs do not move when muscles contract?

False Z discs do move closer together when muscles contract.

T/F Actin and Myosin do not change in length when muscles contract.

True

A Bands stay the same during muscle contraction

True

I Bands stay the same during muscle contraction

False I Bands narrow during muscle contraction

H- zones disappears during muscle contraction

True

How many spinal nerves are there?

31 pairs

How many Cervical Spinal nerves are there?

8

How many thoracic Spinal Nerves are there?

12

How many lumbar spinal nerves are there?

5

What Spinal Nerves make up the Cervical Plexus?

C1-C4

What Spinal Nerves make up the Brachial Plexus?

C5-T1

What Spinal Nerves make up the lumbar plexus?

L1-L4

What Spinal Nerves make up the Sacral Plexus?

L4-S4

What Spinal Nerves are responsible for the Bicep Reflex?

C5 and C6

What Spinal Nerves are responsible for the Triceps Reflex?

C7 and C8

What Spinal Nerves are responsible for the Patellar Reflex?

L2, L3, and L4