Muscular System

Question 1

Skeletal muscle

Answer 1

• voluntary
  -elongated fibers
• multiple peripheral nuclei
• visible striations

Question 2

Cardiac muscle

Answer 2

• Branching
  -Single nucleus
• Visible striations
• involuntary

Question 3

Smooth muscle

Answer 3

• Spindle shape
• single central nucleus
• no striations
• involuntary

Question 4

What makes up fascicles

Answer 4

muscle fibers

Question 5

what type of neurons are motor neurons

Answer 5

efferent

Question 6

Neurotransmitter in muscles

Answer 6

acetylcholine

Question 7

Sarcoplasmic reticulum function

Answer 7

• stores calcium
  -provides internal structure

Question 8

Myofibril definition

Answer 8

a rod-like organelle of a muscle cell which is responsible for the contraction of skeletal muscles

Question 9

T-tubules function

Answer 9

allow the transmission of the action potential

Question 10

Thick filaments are made of

Answer 10

Myosin

Question 11

Thin filaments are made of

Answer 11

Actin

Question 12

Slow twitch muscles

Answer 12

Type 1-Oxidative slow (red fibers)

Question 13

intermediate twitch muscles

Answer 13

Type 2A- Fast Oxidative glycolytic

Question 14

fast twitch muscles

Answer 14

Type 2X- Fast glycolytic (white fibers)

Question 15

Why is Rigor mortis produced?

Answer 15

Muscles require ATP to relax, without ATP they cannot relax therefore they stay contracted, causing rigor mortis after death.

Question 16

A Side product of muscle fatigue

Answer 16

lactic acid –> causes soreness

Question 17

Isotonic concentric contraction

Answer 17

muscle is shortening while generating force (know the length and tension graphs)

Question 18

Isotonic Eccentric contraction

Answer 18

Muscle is lengthening while under tension (know the length and tension graphs)

Question 19

Isometric contraction

Answer 19

The muscle is under tension but neither shortens nor lengthens (know the length and tension graphs)