A pigment called ____ absorbs sunlight to protect the cell.

• melanoma

• keratin

• melanin

• vitamin D

Tags

NGSS.MS-LS1-6

What do the biceps and triceps muscles form?

• sarcomere

• involuntary pair

• antagonistic pair

• reverse contraction

A ____ is the part of a muscle that actually contracts.

• sarcomere

• tendon

• bursae

• cardiac cell

What is the proper sequence of bone repair?

• remodeling--callus formation--fracture

• swelling--remodeling--callus formation

• swelling--callus formation--remodeling

• remodeling--swelling

What is produced in red bone marrow?

• blood cells and platelets

• fatty substances

• osteoblasts

• spongy bone

The ____ skeleton includes the skull, vertebral column, ribs, and sternum.

• upper

• appendicular

• metacarpal

• axial

Which layer of skin is the oil-producing structure shown here found in?

• epidermis

• subcutaneous

• dermis

• connective

The outer layer of epidermal cells contains ____.

• follicles

• endodermis

• keratin

• sebaceous glands

The multilayered organ that covers and protects the body is called ____.

• fatty tissue

• keratin

• epidermis

• skin

Why are ligaments important?

• They hold bones together.

• They connect muscles to bones.

• They produce stronger bone cells.

• They form bone marrow.