Bio Ch. 5

Adequate calcium intake is important for strong bones. What might happen if there is an inadequate calcium intake?

Calcium would not be available to deposit during remodeling.

Osteoarthritis occurs when ____ wears down?

Cartilage.

Osteoclasts ________

Cells that release minerals important for nerve and muscles.

Ligaments connect ___

bone to bone. Ligaments are strong straps of connective tisue that hold bone to bone.

When people have a hip replaced, what is the leg bone involved in the replacement?

femur. Replacement of the hip involves the joint between the pelvic girdle and the femur as shown in Figure 5.16 in the text.

What situation is most likely to cause someone to have thinner, weaker bones?

resting in bed for a few weeks during vacation.

What disorder is caused by an attack on the joint tissues by the bodys immune system?

rheumatoid arthritis. Rheumatoid arthritis differs from the other types of arthritis in that it is an autoimmune disease caused by an immune response of the body toward its own synovial membranes. The body attempts to reject its own tissue just as it would invasive foreign matter

What is part of the pectoral gridle?

scapula

your appendicular skeleton includes your?

scapula.

Bone remodeling is best describes as _____

Deposition and obsorption of bone minerals. Bone remodeling follows the initial growth process and involves bone deposition and absorption.

The "soft spots" called fontanels between a babys skull bones will eventually develope into ____

Fibrous joints The "soft spots" called fontanels between a baby's skull bones will eventually develop into fibrous joints.

Which of the following hormones does NOt stilmulate bone growth?

PTH

The bone marrow that produces blood cells is found in

Spongy bone. In adults, the spongy bone found in the ribs, backbone, skull, and long-bone ends are filled with red marrow that forms red blood cells.

What is NOT a function of the skeletal system?

Synthesis of growth hormones. The skeletal system functions to provide support, places of attachment for muscle movement, protection, storage of minerals, storage of fat, and blood cell production.

When you reach adulthood _____

Your bones continually remodel themselves based on stresses. They do not lengthen just remodel.

The movement in what type of joint in the mother facilitates the delivery of a baby?

cartilaginous The cartilaginous joint in the pelvis of a woman loosens during pregnancy to allow slight movement during childbirth.

Compact bone tissue _____

contains nerve cells, blood vessels, and canals.

What is NOT a function of your bones?

contract to create movement. Bone can NOT contract. Muscle tissue is capable of contracting to creat movement.

If you brake your arm, fibroblast cells will _____

make a colleagen link over the break.

Bone forming cells are called?

osteoblasts Osteoblasts are bone forming cells found in the collar of long bones.They are the precursors of osteocytes.