Biology Chapter 32
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Biology Chapter 32
Skeletal, Muscular and Integumentary Systems
Why is cartilage important?
It acts as a cushin between bones and protects them as they move against each other.
What are the components of the axial skeleton?
Skull, vetebral column, ribs.
What is the main function of the skull?
To protect your brain
Where are the Haversian Canals? See p. 924
In the compact bone layer
Which layer of bone absorbs force on the bone? See p. 924
A tough layer of connective tissue surrounding a bone
Which types of muscle contract without stimulation from the nervous system?
Smooth and cardiac muscles
Which type of muscle has the greatest number of mitochondria?
Which muscles are striated? See photographs on p. 929
Cardiac & skeletal
Why must enzymes destroy acetylcholine in the neuromuscular junction?
To prevent the muscle from contracting uncontrollably
What happens when the thin filaments in a muscle slide over the thick filaments?
The muscle contracts
In the sliding filament model, what would happen if myosin did not attach to actin filaments?
The muscle would be permanently relaxed
What causes the elbow to bend?
Bicep muscle contracts
Which structure joins skeletal muscle to bone?
What do ligaments connect to?
What is a common myth about exercise?
Myth - Exercise increases the number of muscles
What is the most important function of the skin?
What happens when the keratin - producing cells of the skin die?
A waterproof coating is formed
What makes hair strong and moist?
What does human hair and a bird's feather have in common?
What are hives?
Fluid from blood vessels is oozing into surrounding tissue causing swelling
Why are some acnes treated with antibiotics?
To kill the bacteria trapped in the pores
What is a potential sign of skin cancer?
A mole with irregular boarder
Sudden change in a mole's apperance
A sore that does not heal
Which skin cancer is most likely to spread/metastasize?
What is the root of a hair called?