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BIO 232 > Week 9 - Heart Lab > Flashcards

Week 9 - Heart Lab Flashcards

1
Q

Blood returns to the heart from the body. by two major veins?

A
  1. Superior Vena Cava
  2. Inferior Vena Cava
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2
Q

From the Vena Cavas, where does the blood flow next?

A

Right atrium

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3
Q

Where does the blood flow to after the right atrium?

A

Flows through the tricuspid valve into the right ventricle

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4
Q

The blood heads to the lungs in what kind of circuit?

A

Pulmonary Circuit

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5
Q

The blood heads toward the lungs via…

A

Pulmonary semilunar valve –> pulmonary trunk –> pulmonary artery

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6
Q

After the blood has become oxygenated, it returns to the left side of the heart via

A

the pulmonary veins

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7
Q

Where does the oxygenated blood from the lungs, traveling through the pulmonary veins, dump into?

A

Left atrium

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8
Q

Where does the blood travel after the left atrium -

A

left atrium –> bicuspid valve (mitral valve) –> left ventricle –> aortic semilunar valve –> aorta –> to the body

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9
Q

Blood leaves the heart through the biggest artery known as

A

Aorta artery

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10
Q

What does the blood deliver to te body tissues?

A

oxygen and nutrients

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11
Q

The portion of the cardiovascular circuit that serves the body is called

A

the systemic circuit

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12
Q

If the mitral valve does not close properly, how would it affect cardiovascular function?

A

Cardiovascular function would be reduced.

Blood flows backwards when valve is closed - making it harder for the heart to work properly

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13
Q

Describe three features of the cardiac muscle relative to skeletal muscsle

A

Cardiac muscle contains:
striation
nucleus
intercalated discs

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14
Q

The semilunar valves prevent backflow where?

A

Ventricles

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15
Q

The AV valves prevent backflow where?

A

Atriums

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16
Q

What is another term for anastomoses?

A

collateral circulation

17
Q

What is the function of anastomoses (collateral circulation) of the coronary circulation?

A

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

18
Q

Name the four electrical components of the heart.

A
  1. SA node - sinoatrial node
  2. AV node - Atrioventricular node
  3. AV bundle - Atrioventricular bundle
  4. Purkinje fibers
19
Q

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

A

c. both IPSPs and EPSPs

20
Q

Identify which signal (GP - graded potential or AP - action potential) fits the following statement:

Travel down cell body and dendrite?

A

Graded Potential

21
Q

Identify which signal (GP - graded potential or AP - action potential) fits the following statement:

Involves voltage-sensitive channels propagating signal?

A

Action Potential

22
Q

Identify which signal (GP - graded potential or AP - action potential) fits the following statement:

Requires Summation?

A

Graded Potentials

23
Q

Identify if these are CNS or PNS:

Tracts

A

CNS

24
Q

Identify if these are CNS or PNS:

Ganglion

A

PNS

25
Q

Identify if these are CNS or PNS:

Nucleus

A

CNS

26
Q

Identify if these are CNS or PNS:

Nerve

A

PNS

27
Q

Which of the following is associated with reflexive relaxation when muscle force is too great?

Muscle Spindles or Golgi Tendon Organs

A

Golgi Tendon Organs

28
Q

What path of the ANS involves muscarinic and nicotinic receptors at both the preganglionic and postganglionic steps?

Sympathetic or Parasympathetic

A

Parasympathetic

29
Q

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

A

Inhibitory

30
Q

Which cell is present at high density in the fovea of the eye?

Rods or Cones?

A

Cones

31
Q

What does 20/20 mean?

A

numerator = you
denominator = others

you can see the same as an average person at 20 feet

32
Q

Which is more tiring and why?

Distance vision or Close vision?

A

Close vision

Ciliary muscles are contracted - working hard.

Takes muscular effort

33
Q

Which sensor is specific to linear motion and gravity?

a. semicircular canals
b. Organ of Corti
c. Utricle and Saccule

A

c. Utricle and Saccule

34
Q

Frequency of sound waves relates directly to which of the following?

Pitch or amplitude?

A

Pitch

35
Q

How does the density of cutaneous receptors relate to touch detection threshold?

A

The more dense the receptors, the more sensitive to touch, which means low touch threshold

BIO 232 (63 decks)

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