A&P II
End-diastolic volume for each ventricle during rest is normally about
120ml
Calculate the end-systolic volume (ESV) if the end-diastolic volume (EDV) in a resting heart is 110 ml and stroke volume (SV) is 70 ml
40
The amount of blood remaining in each ventricle at the end of the ventricular ejection phase is normally about:
50 ml.
What hormones are released from the adrenal medulla
Catecholamines (epinephrine (adrenaline) and Norepinephrine (noradrenaline)is an example.)
What largely determines preload
End-diastolic volume (EDV)
What is not a responsibility of insulin
Gluconeogenesis and glycogenolysis
high levels of testosterone inhibit the release of
Gonadotropin-releasing hormone (GnRH)
What hormones are produced by zona glomerulosa
Mineralocorticoids (aldesterone)
What vessel(s) deliver oxygenated blood to the left atrium?
Pulmonary veins
which pacemaker cell population has the slowest intrinsic rat of depolarization at about 20 times per minute
Purkinje fiber system
On an ECG atrial repolarization is obscured by
QRS wave
Which of the following can be used to measure heart rate?
R-R interval
what part of an electrocardiogram represents ventricular repolarization
T wave
When is the s1 heart sound heard?
The S1 sound is normally the first heart sound heard - LUB. The S1 is best heard in the Mitral area, and corresponds to closure of the Mitral and Tricuspid
Determine the impact if the connection between the sinoatrial (SA) node and the atrioventricular (AV) node becomes blocked.
The ventricles will contract more slowly.
Determine the impact of the connection between the sa node and the av node
The ventricles will contract more slowly.
What hormones determines the basal metabolic rate at rest when fasting
Thyroid hormones
During what phase does blood flow from the ventricles into the pulmonary trunk and aorta?
Ventricular ejection phase
Hormones that act on the same target cells yet have opposite effects are said to be:
antagonists.
What is NOT part of the cardiac conduction system?
atrioventricular (AV) valve
Inotropic agents affect
contractility of the heart
What decreases the heart rate
decrease blood volume, acetylcholine
Glucosuria ad ketonuria are characteristics of_
diabetes mellitus.
Edna complains of weight gain, cold intolerance, and low blood pressure. What disorder do her symptoms match?
hypothyroidism
What is NOT an effect of parathyroid hormone (PTH)?
increased osteoblast activity
What surface grooves separate the right and left ventricles
interventricular sulcus
what is found between the visceral and parietal pericardium?
pericardial fluid
The degree of stretch experienced by the sarcomeres in the ventricle cells before they contract is called
preload
What normally serves as the pacemaker of the entire heart?
sinoatrial (SA) node
What is not symptom of hyperthyroidism
symptoms: Increased sensitivity to heat. Changes in bowel patterns, especially more frequent bowel movements. An enlarged thyroid gland (goiter), which may appear as a swelling at the base of your neck. Fatigue, muscle weakness.
Archie has a resting heart rate of 125 beats per minute. Classify his cardiac dysrhythmia.
tachycardia
Which two arteries arise from the right coronary artery?
the right marginal artery and the right posterior interventricular artery
Which cranial nerves have a negative chronotropic effect on heart rate?
vagus nerves (CN X)
What is the primary effect of antidiuretic hormone (ADH, or vasopressin)?
water retention by the kidneys
