Cardiovascular Anatomy
Heart muscle is known as:
What is myocardium?
This type of muscle is multi-nucleated
What is skeletal muscle?
This is the thicker of the myofibrils
What is myosin?
This is required for the myosin head to move the myofibrils over each other to cause muscle contraction
What is ATP?
Name three venipuncture sites in the feline
What is the jugular, medial saphenous (or femoral vein) and the cephalic vein?
These disks speed up nerve transmission in cardiac muscle
What are intercalated disks?
The neurotransmitter is released from these structures found in the terminal (or end of) the axon
What is acetylcholine?
These structures cover the actin binding sites
What is tropomyosin?
This enzyme is involved in the end of muscle contraction when muscles relax
What is acetylcholinesterase?
Name three venipuncture sites in the canine
What is the cephalic vein, lateral saphenous vein and jugular vein?
This structure separates the left and right ventricles.
What is the intraventricular septum?
These two structures of the respiratory system are innervated by smooth muscle
What is the trachea and bronchi?
When calcium binds to this structure, actin binding sites are revealed
What is troponin?
This is the movement of actin gliding over myosin once the myosin head binds to the actin
What is the power stroke?
What is the nerve you want to avoid by not EVER drawing from the left jugular vein in the pig
What is the phrenic nerve?
Name the two atrioventricular valves
What are the mitral and tricuspid valves?
These specialized cells are found in the alveoli of the cow mammary gland and squeeze down to allow milk let-down.
What are myoepithelial cells?
When muscle contraction ends, calcium return to the
What is the sarcoplasmic reticulum?
The "dark" meat of the chicken is classified as this type of muscle fiber
What is Slow Twitch/High Oxidative?
The bacteria that causes tetanus is called
What is Clostridium tetani?
These parachute string-like structures attach to the valve and the papillary muscle and prevent backward flow of blood
What are the chordae tendinae?
We discussed this disease of cardiac muscle that affects cats by causing the heart muscle to thicken and the lumen to narrow.
What is hypertrophic cardiomyopathy?
These two electrolytes are needed to create an action potential
What are potassium and sodium?
Anaerobic metabolism takes over in tired muscles and this substance is what causes cramping and discomfort
What is lactic acid?
What organ in the cat differs from the dogs that allows pyrethrin to be toxic?
What is the liver?