La protezione, il sostegno e il movimento - Exercises in English #611451

Sarcomeres

A sarcomere is

A:

a protein

B:

an organ

C:

a contractile myofibril unit

D:

a muscle fibre

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The skin

The skin consists of two main layers; they are

A:

the epithelial and the connective

B:

the epidermis and the dermis

C:

the melanin and the keratin

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Muscle fibres

Each muscle fibre is made up of

A:

just one myofibril

B:

many myofibrils

C:

a sarcomere

D:

a protein

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Muscle cells

Muscle cells are

A:

fibres

B:

myofibrils

C:

sarcomeres

D:

actin and myosin

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Actin and myosin

Actin and myosin are

A:

cells

B:

proteins

C:

tissues

D:

organs

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Cellular structure

a. The first level of organisation in the human body
b. Cells embedded in a mineral matrix
c. One of the two main layers of the skin
d. The cells of the bone tissue
e. Dense connective tissue in a collagen matrix
f. Blood cells are synthetised in it
g. They are made of actin and myosin
h. The contract units of the muscle

Posizionamento

The skin

The skin has many functions:

A:

it protects and defends the body

B:

it is part of the endocrine system

C:

it is used for locomotion

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