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Damage to this part of the brain would cause the body to have less control over cardiac activity?
medulla oblongata
Intercalated discs include these structures
gap junctions, desmosomes, interdigitating folds
The cardiac conduction system includes all of the following except
the tendinous cords
To get from the right atrium to the right ventricle, blood flows through the
tricuspid valve
Which of the following are NOT one of the three variables that govern stroke volume?
pulse
A heart rate at 45 bpm and an absence of P waves suggest
damage to the SA node
The ventricles contract during
the QRS complex
Cardiac muscle does NOT exhibit tetanus because it has
a long absolute refractory period
What is it called when your resting hear rate is below 60 bpm
bradycardia
In an EKG, the P wave represents this
depolarization of the atria
Venous return would be increased by this
increased skeletal muscle activity
high blood pressure is called
hypertension
Friction between the blood and vessel wall has this effect
causes peripheral resistance
This artery supplies blood to the stomach, liver, and spleen
celiac trunk
Blood often flows into a capillary bed from
the metateriole
This type of capillary has no gaps between endothelial cells, is less permeable to large molecules and exists in muscle and nervous tissue
continuous capillary
Which is the correct circulatory route
heart, arteries, capillaries, veins, heart
Blood from the arms, shoulders, and head passes through this vessel in order to return blood to the heart
superior vena cava
Peripheral resistance, opposition to blood flow away from the heart, depends on the following variables except?
blood pH
What is the vasodilator that widens the blood vessels and speeds the flow of the blood to an injured tissue?
histamine
The ___ system consists of a network of vessels that penetrate nearly every tissue of the body, and a collection of tissues and organs that produce immune cells
lymphatic
These are functions of the lymphatic system except
regulates body temperature
The respiratory burst is used by ___ to kill bacteria
neutrophils
Which of the following results from a lack of self-tolerance
systemic lupus erythematousus
__ are the most numerous lymphatic organs; over 400 in adults
lymph nodes
Where are the inguinal lymph nodes located
groin
The only lymphatic organ with both afferent and efferent lymphatic vessels is __?
lymph nodes
Which of the following is NOT a secondary lymphatic organ?
thymus
These mature in the thymus and depend on thymic hormones
T cells
What is the body’s largest lymphatic organ?
spleen
What type of vein cannot vasconstrict?
venous sinuses
What three variables is blood pressure determined by?
cardiac output, blood volume, resistance to flow
What is it called when your resting heart rate is above 100 bpm?
tachycardia
What are the three variables that govern stroke volume?
preload, contractility, afterload
What is the function of the antidiuretic hormone?
promotes water retention and raises blood pressure
What is ONE of the three primary causes of edema?
increased capillary filtration
What are the secondary lymphatic organs?
lymph nodes, tonsils, and spleen
Where are the axillary lymph nodes located?
armpits
What is the body’s largest lymphatic organ?
spleen
What is the body’s primary agent of tissue cleanup and repair?
monocytes
Which hypersensitivity is a reaction to another persons transplanted tissue?
alloimmunity
What are the most common ways HIV is transmitted?
sexual intercourse, contaminated blood products, and contaminated needles
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