Flashcards in Chapter 19 Deck (53):
3 layers of Arteries and Veins
2 types of Arteries
Elastic (Conducting) Arteries
Muscular (Distributing) Arteries and Arterioles
Another name of elastic arteries
Another name for muscular arteries
3 types of Capillaries
5 hormones that play a role in short term regulation of blood pressure
Epinephrine and norepinephrine
Atrial natriurectic peptide (ANP)
Antidiuretic Hormone (ADH)
main factors influencing blood pressure
what does hypertension cause?
where are chemoreceptors located?
large arteries of the neck
structure of elastic or conducting arteries
thick walls and elastic fibers in all 3 layers
structure of muscular or distributing arteries
few elastic fibbers but a thick tunica media with a high percentage of smooth muscle
which type of capillary has tight junctions?
which type of capillary allows large molecules and blood cells to pass through?
which capillaries contain pores?
which capillaries are only found the liver, bone marrow, and spleen?
where is blood pressure the highest?
in the aorta
the highest pressure found during ventricular systole/contraction
the lower pressure during the phase of ventricular relaxation/diastole
how to find pulse pressure
subtract diastolic pressure from systolic pressure
what is the unit used to measure blood pressure?
the pressure that pushes the blood along through the system
mean arterial pressure (MAP)
blood vessel that distributes blood to organs
Which artery wall is responsible for vasoconstruction?
layer of the artery that is composed mainly of elastic and collagen fibers.
When an artery or arteriole is damaged, its smooth muscle contracts producing
a vascular spasm
which type of artery functions as a pressure reservoir?
After birth when the umbilical cord is cut what do the umbilical arteries fill with?
the muscular layer of blood vessels
what do venules unite to form?
blood vessels that are able to constrict
which vessels serve as a blood reservoir
how is blood pressure written?
systolic pressure/ diastolic pressure
This part of the nervous system is responsible for vasomotor tone
what do baroreceptor in arteries respond to?
an increase in blood pressure
what is the effect if Angiotensin II?
increases blood pressure by constricting blood vessels
Atrial natriuretic peptide
effect of ADH
intense vasoconstriction in cases of extremely low blood pressure
effect of ANP
causes blood pressure to decline
effect of epinephrine and norepinephrine
increase the cardiac output by increasing heart rate and stroke volume
what performs long term regulation of blood pressure
healthy systolic BP
healthy diastolic BP
a sudden drop in BP when standing or sitting
how do the kidneys lower blood volume?
by producing urine
the two major factors that aid in the returning bloodflow
the respiratory pump and the muscular pump
how respiratory pump works
every time we breathe in, the pressure inside the thorax decreases which leads to blood being sucked upwards from the abdominal cavity
how muscular pump works
contraction of skeletal muscles pushes blood toward the heart because veins have valves
what effect does Aldosterone have?
increases blood volume by increasing absorption of sodium
what are short-term controls of blood pressure
neural and hormonal controls
the pressure that pushes blood along through the system
mean arterial pressure (MAP)