CH 19 Heart Part 1 Flashcards
(29 cards)
Arteries only carry oxygenated blood?
False! Most but not all carry oxygenated blood (Pulmonary trunk)
Veins only carry deoxygenated blood?
False! Most do but not all carry deoxygenated blood
Which side of the heart has oxygenated blood?
Left
Which side of the heart has deoxygenated blood?
Right
List all the great vessels.
- Pulmonary trunk
- Aorta
- Superior and inferior vena cava
- Pulmonary veins
What is the purpose of heart valves?***
Allows blood to flow in only one direction. And prevent backflow
Pulmonary circulation sends blood to the?
Lungs
Systematic circulation sends blood to the?
Entire body
Superior vena cava collects blood from?
Brain and superior part of body (above arms)
Inferior vena cave collects blood from?
Inferior part of body (below arms)
The heart is enclosed in a sac called the ___?
Paricardium
What structures are covered by endocardium?***
- Internal surface of the heart
- External surface of valves
- Linings of blood vessels
Desmosome function?
Interlock cardiac muscle (prevent heart from falling apart)
Gap-junction function?
Allows passage of ions
What are intercladed disks made of?
Desmosomes and gap-junctions
What is the coronary circulation purpose?
Provide the heart with its own private circulation
What influences the heart beat?***
The ANS
Conduction system function?
Ensure proper timing of contractions
Cardioacceleratory***
- Which ANS division?
- Neurotransmitter?
- Binds to?
- Sympathetic
- NE
- Beta 1
Cardioinhibitory***
- Which ANS division?
- Neurotransmitter?
- Binds to?
- Parasympathetic
- ACh
- Muscarinic
Heart is innervated by which ANS division?***
BOTH (Dual innervation)
Which ANS division affects contraction force and touches the heart itself?
Sympathetic
Nodal cell function?
Initiate action potential (heart beat)
Resting membrane potential of nodal cells is? (RMP)
-60mV (not stable)
