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What happens when ATP supplies energy for thin filaments in a muscle fiber to slide over the thick filaments?

Athe muscle contracts
Bthe muscle relaxes
Cthe muscle both contracts and relaxes
Dthe muscle neither contracts nor relaxes

Hair would be dry and brittle without the presence of

Asebaceous glands
Bkeratin
Cmelanin
Dfat

compared with the walls of arteries the walls of capillaries

Aare thicker
Bare thinner
Clack valves
Dhave more resistance

Verified Answer :

taskmasters
  1. A. Sebaceous glands
    Lipids are macromolecules which provide insulation. 
    A macromolecule is a large molecule. There are four groups of macromolecules: carbohydrates, proteins, nucleic acids and lipids. Lipids consist of glycerol and fatty acids and are constructed from fats, oils, waxes, phospholipids and steroids. A lipid's function is to insulate the body and provide warmth in cold conditions. It can be concluded that a person with very little body fat gets very cold easily and a person with a lot of body fat gets very warm very quickly.

    3. B. Thinner

lmimms02

The answer to your questions are

  1. a
  2. a
  3. b

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