Skeletal, Muscular, & Cardiovascular Systems Flashcards
Where is bone marrow produced? (2)
- Spongy bones
2. End of long bones (there’s a bit of spongy bone in there)
State the number of true, false, and floating ribs we have. (3)
- True ribs = 7
- False ribs = 5
- Floating ribs = 2
List the 5 types of white blood cells and state their main functions. (5)
- Neutrophils - phagocytize bacteria
- Lymphocytes - immunity and production of antibodies
- Monocytes = cleans up debris and phagocytosis of old tissue
- Eosinophils - kills parasites; allergic reactions
- Basophils - allergy symptoms (heparins + histamines)
List the 5 functions of the skeletal system. (5)
- Support
- Protection
- Movement
- Storage (fat, minerals, calcium)
- Hematopoeisis
List the 5 functions of the muscular system. (5)
- Provide movements
- Maintain posture and body position
- Stabilize joints
- Generate heat
- Protection
A lack of what compound will cause the heart to stop beating?
Potassium
What do the purkinje fibers do?
Cause the ventricles of the heart to contract
What is the medical term for heart attack?
Myocardial infarction
Which chambers are known as the receiving chambers?
Left and right atrium
Which chambers are known as the pumping chambers?
Left and right ventricle
Define: anemia
Lacking in blood; decreased number of red bloodcells
What is the name of the node known as the pacemaker of the heart?
Sinoatrial node (SA node)
List the 4 layers of the heart from inner to outer (4)
- Endocardium
- Myocardium
- Epicardium
- Pericardium
Define: pericardium
Double-walled membranous sac that encloses the heart
Define hemophilia
Hereditary bleeding disorders that result from a lack of any of the factors needed for clotting
What is blood made up of and in what percentages? (2)
- Plasma (55%)
2. Formed elements (45%)
What is the most numerous formed element?
Erythrocytes
Define: acetylcholine
Neurotransmitter that stimulates skeletal muscle fibers
Define: tetanus
Condition that causes the muscles to go into uncontrollable spasms
What happens to a muscle when it is no longer stimulated by nerves?
Atrophy
What is the name of the process in which pyruvic acid is converted to lactic acid?
Anaerobic glycolysis and lactic acid formation
How do antagonist muscles move?
Opposite to the movement of the prime mover
What is the muscle responsible for causing a particular movement?
Prime mover
What happens when a muscle contracts?
The insertion moves towards the origin
Define: synovial joint
Fully movable joint
What does a comminuted fracture result in?
Many broken pieces
What is a long bone also known as?
Diaphysis
Differentiate between compact bones and spongy bones. (2)
- Compact bones - dense and looks smooth and homogenous (same kind)
- Spongy bones - small, needle-like pieces of bones and lots of open space (bone marrow production)
What kind of bones belong to the axial skeleton?
Bones that form the longitudinal axis
What 3 things does the skeletal system include? (3)
- Joint
- Ligaments
- Cartilage
What is the cavity of the shaft a storage area for in adults and what is it also called? (2)
- Adipose tissue
2. Yellow marrow
Define: rickets
Deficiency in vitamin D and calcium
What is the longest bone in the body?
Femur
What hormone determines if a bone is to be broken down for the release of calcium?
Parathyroid hormone (PTH)
What is the cavity of the shaft called if is it forming red blood cells?
Red marrow
Define: scoliosis
Abnormal curvature of the spine
What muscle type is found in the hollow organs?
Smooth muscle
Differentiate between insertion and origin. (2)
- Insertion = movable attachment of a muscle
2. Origin = attachment of a muscle that remains relatively fixed during a muscle contraction
What is the only bone in the body that is not attached by a joint?
Hyoid
Differentiate between adduction and abduction. (2)
- Adduction = towards the body midline
2. Abduction = away from thebody
Define: circumduction
Proximal end is stationary and distal end rotates
Define: peristalsis
Wave-like muscle contractions that move food, liquids, and other materials down the digestive tract