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NEW BIOL 235 final Exam LATEST EXAM REAL EXAM 300 QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)|AGRADE

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NEW BIOL 235 final Exam LATEST EXAM REAL EXAM 300 QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)|AGRADE SET 1 Venous blood returning from systemic circulation first enters the , proceeds to the , loses a

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NEW BIOL 235 final Exam LATEST
EXAM2023-2024 REAL
EXAM 300 QUESTIONS AND CORRECT
ANSWERS (VERIFIED
ANSWERS)|AGRADE

SET 1
Venous blood returning from systemic circulation first enters the , proceeds to the
, loses and gains in the lungs, and then returns to the heart via the .

a) right atrium, right ventricle, pulmonary artery, CO2, O2, pulmonary veins.
b) Left atrium, left ventricle, pulmonary artery, CO2, O2, aorta
c) Right atrium, right ventricle, pulmonary artery, O2, CO2, pulmonary veins
d) Left atrium, right ventricle, pulmonary veins, O2, CO2, aorta - A. Right atrium, right
ventricle, pulmonary artery, CO2, O2, pulmonary veins

which is true abbout the pleural sac
a) it is continuous with the atmosphere and protects the lungs from infections

,b) it is a closed sac surrounding each lung and contains only a tiny volume of lubricating
fluid
c) it is a closed sac surrounding each lung and contain a large volume of surfactact
d) it is a closed, air-filled space surrounding both lungs that has a negative pressure
compared to atmospheric pressure - b) it is a closed sac surrounding each lung and
contains only a tiny volume of lubricating fluid

which structure is NOT part of the "anatomical dead space?"
a) bronchiole
b) trachea
c) bronchus
d)respiratory bronchiole - d)respiratory bronchiole

the volume of air flowing into the alveoli during inhalation/inspiration is increased when
there is an increase in which of these?
a) air resistance
b) the pressure gradiant from the atmosphere to the alveoli
c) the pressure in the intrapleural space
d) the curvature of the diaphragm - b)the pressure gradiant from the atmosphere to the
alveoli

under normal circumstances, which of the following would result from an increase in
transpulmonary pressure?
a) inhalation/inspiration
b) exhalation/expiration
c) a collapsed lung
d) emphysema - a) inhalation/inspiration

which of the following statements about the response of arteriole smooth muscle to
changing ocygen partial pressure is true?
a) both systemic and pulmonary arterioles respond to a decrease in PO2 by constricting
b) both systemic and pulmonary arterioles respond to a decrease in PO2 by dilating
c) systemic arterioles respond to a decrease in PO2 by dilating but pulmonary arterioles
constrict in response to decreased PO
d) systemic arterioles respond to a decrease in PO2 by constricting but pulmonary
arterioles dilate in response to decreased PO2 - c) systemic arterioles respond to a
decrease in PO2 by dilating but pulmonary arterioles constrict in response to decreased
PO

during an unforced exhalation/expiration, which would NOT be true?
a) alveolar pressure is greater than atmospheric pressure
b) intrapleural pressure is greater than alveolar pressure
c) intrapleural pressure becomes less negative
d) the diaphragm relaxes - b) intrapleural pressure is greater than alveolar pressure

which true regarding how gases dissolve in liquids?

,a0 the concentration of a gas in a liquid equilibrates to match the concentration of that
gas in the air to which of the liquid is exposed
b) different gasses have the same solubility in liquids
c) the partial pressure of a gas in a liquid is equal to the amount greatly diffusing in the
liquid plus the amount bound to large molecules within the liquid
d) the partial pressure of a particular gas in a liquid equilibrates to match the partial
pressure o that gas in the air to which the liquid is exposed - d) the partial pressure of a
particular gas in a liquid equilibrates to match the partial pressure o that gas in the air to
which the liquid is exposed

which of these results from hyperventilation?
a) increased alveolar PCO2 and decreased alveolar PO2
b) an increase in both PO2 & PO2
c) decreased alveolar PCO2 & increased alveolar PO2
d) a decrease in both alveolar PCO2 & PO2 - c) decreased alveolar PCO2 & increased
alveolar PO2

In which form is most of the oxygen carried in arterial blood?
a) bound to hemoglobin
b) dissolved in the plasma
c) dissolved in the cytosol of erthrocytes
d) converted to HCO3 - a) bound to hemoglobin

after CO2 is produced by tissues, in what form is most of that carbon transported th the
lungs for removal from the body?
a) as dissolved CO2
b) found to hemoglobin
c) as H2CO3
d) as dissolved HCO3 - d) as dissolved HCO3

action potential in neurnos in the inspiratory center of the medulla result in ation
potentials in the nerves to the diaphragm, which in turn cause of the muscle,
resulting in a/an in the volume of teh thoiracic cage.
a) motor, contraction, decrease
b? parasympathetic, contration, decrease
c) sympathetic, contraction, increase
D) motor, contraction, increase - D) motor, contraction, increase

which is NOT a function of the kidneys in maintin homeostaisis?
a) regulation of extracellular fluid osmolarity
b) regulation of blood hydrogen ion concentration
c) regulation of blood glucose concentration
d) regulation of extracellular fluid volume - c) regulation of blood glucose concentration

which of the following does NOT correctly describe kidney function?

, a) they contribute significantly to long term regulation of arterial blood pressure by
maintaining the proper plasma volume
b) they produce urine of a constant composition at all time, in order to maintain
homeostasis of extra cellular fluid
c) they excrete metabolic waste products
d) the assist in maintaing proper acid base balance in the body - c) they excrete
metabolic waste products

the amount of a substance that is excreted in the urine is equal to the amount that is
plus the amount that is minus the amount that is .
a) filtered, reabsorbed, secreted
b) reabsorbed, filtered, secreted
c) secreted, reabsorbed, filtered
d) filtered, secreted, reabsorbed - d) filtered, secreted, reabsorbed

which is TRUE about the juxtaglomerular apparatus?
a) it is composed of parts of the ascending limb of the loop of Henle and the efferent
arteriole
b) it is composed of glomerular capillaries and the macula densa
c) it is the site of renin secretion
d) it is created by the junction between the proximal tubule and the afferent arteriole - C.
It is the site of renin secretion.

which correctly describes the composition of the gomerular filtrate
d) it is highly similar to plasma, except it doe s not contain plasma proteins - D. It is
highly similar to plasma, except it does not contain plasma proteins.

constriction of the decreased hydro-static pressure in .
a) afferent arterioles, glomerular capillaries
b) efferent arterioles, proximal convoluted tubules
c) renal vein, peritubular capillaries
d) efferent arterioles, glomerular capillaries - A. afferent arterioles, glomerular capillaries

which is true for a man who is in balance for total bdy water?
a) he must ingest more water than is lost in the urine
b) he must ingest more water than is lost by all output pathways combined
c) he must ingest less water than is lost in the urine
d) the water filtered into Bowmans capsule must be 100% reabsorbed - a) he must
ingest more water than is lost in the urine

where do Na/KATPase pumps play an active role in reabsorbing Na?
a) in bowmans capsule epithelial cells, facing the interior of Bowmans space
b) in the basolateral membrane of cells of thr cortical collecting ducts
c) in the apical membrane of epithelial cells of the proximal tubule
d) in the luminal membrane of epithelial cells of the distal convoluted tubule - b) in the
basolateral membrane of cells of thr cortical collecting ducts

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Exam (elaborations)

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