Muscles & the Sliding Filament Theory

Question 1

Cardiac Muscle

Answer 1

• Strongest
• Used the most
• Makes heart beat
  Location: the walls of the heart

Question 2

Smooth muscle

Answer 2

Location: lining of many organs (eg. stomach, esophagus, uterus, blood vessels)
- Type of Contraction: involuntary - can sustain prolonged contractions

Question 3

Skeletal Muscle

Answer 3

Location: attached to the bones of skeleton by tendons [bands of connective tissue connecting muscles to bones]
Type of Contraction: voluntary - controlled consciously.

Question 4

Muscle Contractions

Answer 4

When muscles contract they shorten.
Muscles can ONLY pull (They cannot push!)
Muscles that permit movement are found in pairs, because as a muscle is in the relaxed state it needs an opposite muscle to stretch it.

Question 5

Antagonist Muscle:

Answer 5

pairs of muscles that work against each other to make a joint move. As one contracts, the other relaxes. (Eg. Biceps & Triceps)

Question 6

Muscle Contractions

Answer 6

Biceps muscle contracting
Triceps muscle relaxed