BIOL 2458 Exam 1 APII UTA Questions With Complete
Solutions
what is true about right and left side of the heart during cardiac
cycle
both right and left sides of the heart pump the same amount of
blood
norepinephrine acts on the heart by
causing thershold to be reached more quickly
what would be the effect of dehydration on the stroke volume
and why
it would decrease stroke volume because of lower preload
why is it important that every organ gets its own blood supply
if one organ loses blood supply, the others do not get shut down
as a result, and so that every organ can get pure oxygenated
blood
pericardium
surrounds the heart and protects againist friction
what are intercalated discs
attachments between cardiac muscle cells allowing synchronized
contraction
true about autorhythmic muscle fibers
, they initiate their own action potentials because of the unstable
resting membrane
during which part of the ekg/eeg wave is the action of
depolarizing atria indicates
p wave
during which part of the ekg/eeg wave is the action of
ventricular repolarization indicated
t wave
what is true of ventricular contraction
blood is pumped into the aorta and pulmonary trunk
correct order of the cardiac cycle
passive ventricular filling, atrial contraction, isovolumetric
ventricular contraction, ventricular contraction, isovolumetric
ventricular relaxation
which of the following hormones interact with a receptor in the
nucleus
estradiol
cells from the hypothalamus influence which lobes of the
pituitary gland via a portal system
anterior
the endocrine secretions from the hypothalamus are
released into the first capillary bed of hypothalamic hypophyseal
portal circulation
Solutions
what is true about right and left side of the heart during cardiac
cycle
both right and left sides of the heart pump the same amount of
blood
norepinephrine acts on the heart by
causing thershold to be reached more quickly
what would be the effect of dehydration on the stroke volume
and why
it would decrease stroke volume because of lower preload
why is it important that every organ gets its own blood supply
if one organ loses blood supply, the others do not get shut down
as a result, and so that every organ can get pure oxygenated
blood
pericardium
surrounds the heart and protects againist friction
what are intercalated discs
attachments between cardiac muscle cells allowing synchronized
contraction
true about autorhythmic muscle fibers
, they initiate their own action potentials because of the unstable
resting membrane
during which part of the ekg/eeg wave is the action of
depolarizing atria indicates
p wave
during which part of the ekg/eeg wave is the action of
ventricular repolarization indicated
t wave
what is true of ventricular contraction
blood is pumped into the aorta and pulmonary trunk
correct order of the cardiac cycle
passive ventricular filling, atrial contraction, isovolumetric
ventricular contraction, ventricular contraction, isovolumetric
ventricular relaxation
which of the following hormones interact with a receptor in the
nucleus
estradiol
cells from the hypothalamus influence which lobes of the
pituitary gland via a portal system
anterior
the endocrine secretions from the hypothalamus are
released into the first capillary bed of hypothalamic hypophyseal
portal circulation
