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