Musculoskeletal System

Question 1

Three functions of the skeleton

Answer 1

• support
• protection for soft organs
• movement

Question 2

2 types of skeletons

Answer 2

• External exoskeletons; insects and relatives

- Internal endoskeletons; vertebrates

Question 3

2 types of bone tissue

Answer 3

• dense compact bone tissue

- open and pours spongy bone

Question 4

3 types of muscle tissue

Answer 4

Skeletal, cardiac and smooth

Question 5

Which muscles are considered straighten? Why?

Answer 5

Skeletal and cardiac muscles; microscopically they are striped

Question 6

Of the following, which is a muscle cell, larger than a cell and a molecule? Deltoid, actin, muscle fiber.

Answer 6

• a muscle fiber is a cell
• actin is a molecule
• a deltoid is larger than a cell

Question 7

Steps of Sliding Filament Model

Answer 7

1. Myosin heads attach to actin
2. Myosin heads bend pulling one filament past the other
3. Myosin heads release and reattach to actin a little further down