Human Systems Test 1: Question Preview (ID: 23395)

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What two layers make up skin?
a) keratin and dermis
b) epidermis and melanin
c) epidermis and dermis
d) melanin and keratin

Which of the following are tubelike pockets of epidermal cells that extend into the dermis?
a) epidermal layers
b) keratin layers
c) melanin cells
d) hair follicles

The most important function of the skin is
a) protection.
b) storing fat.
c) sweating.
d) insulation.

What tough connective tissue joins skeletal muscles to bones?
a) joints
b) ligaments
c) periosteum
d) tendons

Myosin and actin make up
a) osteoblasts.
b) collagen.
c) myofibrils.
d) red marrow.

What happens when the thin filaments in a muscle fiber slide over the thick filaments?
a) A muscle contracts.
b) A muscle relaxes.
c) A muscle both contracts and relaxes.
d) A muscle neither contracts nor relaxes.

Where is cardiac muscle tissue located in the body?
a) heart
b) ribs
c) skull
d) bones

Ligaments connect
a) cartilage to bone.
b) muscle to muscle.
c) bone to muscle.
d) bone to bone.

The process by which cartilage is replaced by bone is
a) ossification.
b) osteoblasts.
c) osteocytes.
d) osteoclasts.

The dark pigment in the skin is called
a) melanin.
b) dermis.
c) epidermis.
d) keratin.

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