Kes 344 Flashcards
Which hormone increases osteoclasts activity to release more Ca ions into blood ?
PTH
Loss of mass to bones w/age is a ?
Reflects an imbalance of bone remodeling process
Which cell helps with resorption ?
Osteoclasts
What is necessary for intramembranous ossification to take place ?
Ossification center forms in fibrous connective tissue
Haversion canal is the site of?
Blood vessels and nerve fibers
Ossification of the ends of long bones is?
Characterized by secondary ossification
The functional unit of compact bone is?
Osteon
What can delay/prevent osteoporosis ?
Weight bearing exercise
Location of blood forming tissue is?
Pelvis is most common site
Diploe means ?
Internal layer of spongy bone in flat bone
Fracture in the shaft would be a break in ?
Diaphysis
Deficiency of growth hormone causes ?
Low proliferation of the epiphysis plate cartilage
What tissue helps in long bones in embryo
Hyaline cartilage
The cell responsible for secreting the matrix of bone is the ?
Osteoblasts
Which type of bone is adopted to withstand stress ?
Spongy bone
Yellow bone marrow contains a large % of?
Fat
Qualities of water #1
Water mixed polar compounds
Qualities of water #2
Water expands when frozen
Qualities of water #3
Water doesn’t compress even with strong forces
Qualities of water #4
Water has high heat capacity
The mass # of an atom is?
Sum of protons and neutrons
Osmolarity of a substance means ?
The number of osmoles per kg of a solvent
What is metabolic acidosis ?
Bicarbonate levels in plasma low , kidneys increase alkaline reserve
pH means ?
Potential of hydrogen
Main elements in human body
Hydrogen , carbon , nitrogen, oxygen , phosphorus, sulfur
Ionic bonds
Gains stability by losing one electron
Covalent bonds
Electrons shared so that each atom is able to fill outer shell
Hydrogen bonds
Form a hydrogen atom already covalently linked on electron forms a bridge
Long bones
Arms legs fingers toes
Flat bones
Sternum
Scapulae
Ribs
Skull
Cartilage
No blood vessels or nerves surrounded by perichondrium
Perichondrium
Source of blood vessels nutrients diffuse through the matrix
Osteoid
Organic material of the matrix secreted by osteoblasts
Osteoblasts
Responsible for production of new bone–osteogenesis
Osteoclasts
Related to microphages , giant multi-nucleated cells at the site of bone resorption
Long bones
Arms legs fingers toes
Flat bones
Sternum
Scapulae
Ribs
Skull
Cartilage
No blood vessels or nerves surrounded by perichondrium
Perichondrium
Source of blood vessels nutrients diffuse through the matrix
Osteoid
Organic material of the matrix secreted by osteoblasts
Osteoblasts
Responsible for production of new bone–osteogenesis
Osteoclasts
Related to microphages , giant multi-nucleated cells at the site of bone resorption
The Osteoid portion of bone matrix is not important in providing ?
Hardness to the bone
Fracture where the bone ends are incompletely separated
Green stick fracture
Acids
Release protons when dissolved in water
What cell is responsible for secreting the matrix of bone ?
Osteoblasts
Dipole
The internal layer of spongy bone in flat bones
Spiral fracture
From twisting forces applied to bone common in sports
Epiphysial fracture
Epiphysis separates from diaphysis along the growth plates
Common in children
Depressed fracture
Broken portion inward typically skull fracture
Steps of bone healing process
- hematoma formation
- fibrocartilaginous callus formation
- bong callus forms
- bone remodeling
Electrons are responsible for…
Chemical behavior of atoms
What is a proton ?
Positive charge, has 1 amu in the nucleus
What makes cartilage resilient?
Water
