tendon biceps (contracted) origin origin triceps biceps (relaxed) (relaxed) radi
ID: 208968 • Letter: T
Question
tendon biceps (contracted) origin origin triceps biceps (relaxed) (relaxed) radius triceps (contracted) humerus insertion insertion ulna s 6. Describe the movement of the movement of Biceps and Triceps during extension. 7. What are extensor and flexor muscles? Integumntary Syste KEY CONCEPT The integumentary system has many tissues that protect the body. VOCABULARY integumentary system epidermis keratin hair follicle dermis MAIN IDEA: The integumentary system helps maintain homeostasis ill in the blank with the word or phrase that best completes the sentence 1. The is an organ system that surrounds and protects all other organ systems 2. Acidic oils that help prevent bacterial and fungal infections are secreted by in the skin. forms hair 3. A tough, waterproof protein called and nails. Mr.MAZEN & Ms.THOURAYA Page 3 of 5Explanation / Answer
6. Extension is the straightening movement of the arm. During the process of extension, the triceps contracts and the biceps relax. This results in the straightening of the arm thus increasing the angle between the forearm and the upper arm.
7. A flexor muscle is a skeletal muscle. Contraction of this flexor muscle decreases the angle between the bones and results in bending of a joint. An extensor muscle on the other hand is also a skeletal muscle whose contraction increases the angle between the bones and results in extension or stretching of a joint.
1. The integumentary system is an organ system that surrounds and protects all other organ systems.
2. Acidic oils that prevent bacterial and fungal infections are secreted by sebaceous glands (present in the dermis) in the skin.
3. A tough, waterproof protein called keratin (fibrous protein) forms hair and nails.
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