Muscle And Muscle Tissue

Question 1

Smooth muscle

Answer 1

• not in lines, non striated, one nucleus
  Structure- long and tapered each with one nucleus that is arranged in parallel line to form sheets
  Function- contraction is involuntary

Eg. walls of internal organs and blood vessels

Question 2

Cardiac muscle

Answer 2

• branched, one nuclei, non striated
  Structure- forms the walls of the heart, the cells are tubular and non-striated, they have only one nucleus and are branched
  Function- unique to the heart with involuntary contractions

Eg. heart

Question 3

Skeletal muscle

Answer 3

• striated, many nuclei
  Structure- tubular and striated that are attached to the skeleton, they are long and have many nuclei and are referred to as fibres
  Function- under conscious control and they move the skeleton

Eg. Biceps and triceps

Question 4

Muscle functions

Answer 4

1. Support the body- contraction opposed to the force of gravity
2. Make the skeleton move
3. Maintain constant body temperature: the contraction causes atp to break down which releases heat
4. Protect internal organs and stabilize joints