Bones, Muscles, and Skin

Question 1

What are the five major functions of the skeleton?

Answer 1

Shape and Support
Movement and Protection
Production and Storage of Substances
Immovable Joints
Movable Joints

Question 2

What are the 26 small bones that make up the backbone?

Answer 2

Vertebrae

Question 3

The long bones of the arms and legs make?

Answer 3

Blood

Question 4

Which bones are held together by immovable joints?

Answer 4

Skull

Question 5

Allows forward or backwards motion. Located in knee and elbow.

Answer 5

Hinge Joint

Question 6

Allows the greatest range of motion. Located in shoulder and hips.

Answer 6

Ball-and-Socket Joint

Question 7

Allows one bone to rotate around another. Located in the neck.

Answer 7

Pivot Joint

Question 8

Allows one bone to slide over another. Located in wrist and ankle.

Answer 8

Gliding Joint

Question 9

Below outer membrane.

Answer 9

Compact Bone

Question 10

Soft connective tissue in the spaces in bone.

Answer 10

Marrow

Question 11

Much of an infant’s skeleton is _____.

Answer 11

Cartilage

Question 12

Exercising is important for muscles because it?

Answer 12

Helps maintain strength and flexibility.

Question 13

Is the skeletal muscle striated or not?

Answer 13

Striated

Question 14

Is the smooth muscle striated or not?

Answer 14

Not

Question 15

Is the cardiac muscle striated or not?

Answer 15

Striated

Question 16

A strong connective tissue that attaches muscles to bone is a?

Answer 16

Tendon

Question 17

The cardiac muscle is found only where?

Answer 17

In your heart

Question 18

Why must skeleton muscles work in pairs to move bones?

Answer 18

Because muscle cells can only contract, not extend

Question 19

To bend the elbow, the biceps muscle _____ and the triceps muscle returns to its _____ _____.

Answer 19

Contracts

Original Length

Question 20

The outermost layer of skin is the?

Answer 20

Epidermis

Question 21

List the levels of organization in the human body, starting with the smallest unit.

Answer 21

Cells
Tissues
Organ
Organ System

Question 22

The basic unit of structure and function in a living thing is a?

Answer 22

Cell

Question 23

The control center that directs the cell’s activities and contains information that determines the cell’s form and function is the _______.

Answer 23

Nucleus

Question 24

Muscle tissue can _____ and _____.

Answer 24

Contract

Shorten

Question 25

What does the skull protect?

Answer 25

Brain

Question 26

What do the ribs protect?

Answer 26

Lungs

Question 27

What does the breast bone or sternum protect?

Answer 27

Heart

Question 28

Carries messages to and from the brain and other parts of the body. Brain Cells

Answer 28

Nervous Tissue

Question 29

Is the following sentence true or false? An organ has a specific job that is more complex than that of a tissue.

Answer 29

True

Question 30

What is an organ system?

Answer 30

A group of organs that work together to perform a major function.

Question 31

The process by which an organism's internal environment is kept stable in spite of changes in the external environment is called?

Answer 31

Homeostasis

Question 32

How does your body maintain a constant temperature on a hot day?

Answer 32

It allows excess heat to escape the body.

Question 33

Skin forms a ______ that keeps disease-causing microorganisms and harmful substances outside the body.

Answer 33

Barrier

Question 34

The outer layer of the skin?

Answer 34

Epidermis

Question 35

Contains _____, which gives the skin its color. The more you have the darker your skin. Exposure to sunlight stimulates production, leading to a tan which protects the skin from burning.

Answer 35

Melanin

Question 36

Protects the skin from burning?

Answer 36

Melanin

Question 37

Contains the nerves and blood vessels of the skin.

Answer 37

Dermis

Question 38

What is one way to have good skin care?

Answer 38

Keep skin clean. It helps control oil. Oil and dirt can clog pores, forming acne.