Ortho

Question 1

What in muscle is alternating dark bands (myocin) and light bands (actin) called?

Answer 1

Striation

Question 2

What type of muscle is striated and voluntarily controlled (somatic)?

Answer 2

Skeletal Muscle

Question 3

what type of muscle is striated and involuntary (autonomic)?

Answer 3

Cardiac Muscle

Question 4

What type of muscle is non-striated and involuntary (autonomic)?

Answer 4

Smooth Muscle

Question 5

What type of muscle initiation is present in skeletal muscle?

Answer 5

Neurogenic

Question 6

What type of muscle initiation is present in cardiac muscle?

Answer 6

Myogenic (Pacemaker potential)

Question 7

What type of junction are present in skeletal muscle?

Answer 7

Neuromuscular

Question 8

What type of junction are present in cardiac muscle?

Answer 8

Gap junctions

Question 9

Where does Ca2+ come from in skeletal muscle?

Answer 9

Sarcoplasmic reticulum

Question 10

Where does Ca2+ come from in cardiac muscle?

Answer 10

ECF and sarcoplasmic reticulum

Question 11

Gradation of contraction in skeletal muscle

Answer 11

By (1) motor unit recruitment, (2) summation of contractions

Question 12

Gradation of contraction in cardiac muscle

Answer 12

Depends on the extent of heart filling with blood (preload) - Frank-Starling
mechanism

Question 12

What is a motor unit?

Answer 12

A single alpha neuron and all the skeletal muscle fibres it innervates

Question 13

What are myofibrils?

Answer 13

Specialised intracellular structures

Question 14

What is in a myofibril?

Answer 14

Myocin and Actin

Question 15

What is a sarcomere?

Answer 15

Functional units of muscle