Week 9 - Heart Lab Flashcards
Blood returns to the heart from the body. by two major veins?
- Superior Vena Cava
- Inferior Vena Cava
From the Vena Cavas, where does the blood flow next?
Right atrium
Where does the blood flow to after the right atrium?
Flows through the tricuspid valve into the right ventricle
The blood heads to the lungs in what kind of circuit?
Pulmonary Circuit
The blood heads toward the lungs via…
Pulmonary semilunar valve –> pulmonary trunk –> pulmonary artery
After the blood has become oxygenated, it returns to the left side of the heart via
the pulmonary veins
Where does the oxygenated blood from the lungs, traveling through the pulmonary veins, dump into?
Left atrium
Where does the blood travel after the left atrium -
left atrium –> bicuspid valve (mitral valve) –> left ventricle –> aortic semilunar valve –> aorta –> to the body
Blood leaves the heart through the biggest artery known as
Aorta artery
What does the blood deliver to te body tissues?
oxygen and nutrients
The portion of the cardiovascular circuit that serves the body is called
the systemic circuit
If the mitral valve does not close properly, how would it affect cardiovascular function?
Cardiovascular function would be reduced.
Blood flows backwards when valve is closed - making it harder for the heart to work properly
Describe three features of the cardiac muscle relative to skeletal muscsle
Cardiac muscle contains:
striation
nucleus
intercalated discs
The semilunar valves prevent backflow where?
Ventricles
The AV valves prevent backflow where?
Atriums
What is another term for anastomoses?
collateral circulation
What is the function of anastomoses (collateral circulation) of the coronary circulation?
Develops slowly as we age to create alternating pathways for the blood to flow through the coronary arteries in case of a blockage.
Helps for protection in older adults in heart attack
Name the four electrical components of the heart.
- SA node - sinoatrial node
- AV node - Atrioventricular node
- AV bundle - Atrioventricular bundle
- Purkinje fibers
Which of the following could involve a channel that allows potassium to move down its concentration gradient?
a. IPSPs
b. EPSPs
c. both IPSPs and EPSPs
c. both IPSPs and EPSPs
Identify which signal (GP - graded potential or AP - action potential) fits the following statement:
Travel down cell body and dendrite?
Graded Potential
Identify which signal (GP - graded potential or AP - action potential) fits the following statement:
Involves voltage-sensitive channels propagating signal?
Action Potential
Identify which signal (GP - graded potential or AP - action potential) fits the following statement:
Requires Summation?
Graded Potentials
Identify if these are CNS or PNS:
Tracts
CNS
Identify if these are CNS or PNS:
Ganglion
PNS
Identify if these are CNS or PNS:
Nucleus
CNS
Identify if these are CNS or PNS:
Nerve
PNS
Which of the following is associated with reflexive relaxation when muscle force is too great?
Muscle Spindles or Golgi Tendon Organs
Golgi Tendon Organs
What path of the ANS involves muscarinic and nicotinic receptors at both the preganglionic and postganglionic steps?
Sympathetic or Parasympathetic
Parasympathetic
Beta-2 receptors of sympathetic nervous system in the coronary, cerebral, and pulmonary circulation OR bronchioles of the lungs should be which of the following?
Stimulatory or Inhibitory
Inhibitory
Which cell is present at high density in the fovea of the eye?
Rods or Cones?
Cones
What does 20/20 mean?
numerator = you
denominator = others
you can see the same as an average person at 20 feet
Which is more tiring and why?
Distance vision or Close vision?
Close vision
Ciliary muscles are contracted - working hard.
Takes muscular effort
Which sensor is specific to linear motion and gravity?
a. semicircular canals
b. Organ of Corti
c. Utricle and Saccule
c. Utricle and Saccule
Frequency of sound waves relates directly to which of the following?
Pitch or amplitude?
Pitch
How does the density of cutaneous receptors relate to touch detection threshold?
The more dense the receptors, the more sensitive to touch, which means low touch threshold
