Bio Sci E109 Midterm 1 Questions With Complete Solutions
A cell with volume 100 fl (femtoliters, 10^-15 liters) has an
internal solute concentration of [Na+] = 14mM. Water enters the
cell until the cell volume doubles. How has the number or moles
of Na+ inside the cell changed after the water enters the cell?
Correct Answers 7mM.
This is bc we have to find liters so: 14mmoles/2 liters = 7mM
A chemical signal will be identified as a hormone if it Correct
Answers is released into the bloodstream for distribution
throughout the body.
A negative feedback loop in thermoregulation means that
Correct Answers the temperature is regulated to stay within a
narrow range
acclimation Correct Answers adaptation of physiological
processes to a given set of environmental conditions when it
happens artifically in a lab setting.
acclimatization Correct Answers adaptation of physio
processes to a given set of environmental conditions when it
occurs naturally.
active transport Correct Answers primary active transport uses
ATP directly o move molecules against their concentration
gradient (opposite direction) (sodium out, potassium in).
Secondary active transport uses energy stored by action of the
, primary active transport. requires input of energy from some
outside source such as a high-energy phosphate bond of ATP
adrenal cortex Correct Answers outer portion of adrenal gland
agonist Correct Answers mimics response of primary
ligand/activates receptor
an example of local control Correct Answers when oxygen
concentration in a tissue decreases. the cells lining the small
blood vessels that bring blood to the area sense the lower
oxygen conc.. and respond by secreating a chemical signal,
where a signal molecule diffuses to nearby muscles in the blood
vessel wall, sending a message to relax.
antagonist Correct Answers blocks response/receptor activity
anterior pituary Correct Answers a true endocrine gland of
epithelial origin derived from embryonic tissue that formed the
roof of the mouth
antiport carriers Correct Answers move substrates in opposite
directions
Autocrine siganling Correct Answers cell secretes a signal to
bind to itself
body's load Correct Answers the amount of substance in the
body aka sodium load
A cell with volume 100 fl (femtoliters, 10^-15 liters) has an
internal solute concentration of [Na+] = 14mM. Water enters the
cell until the cell volume doubles. How has the number or moles
of Na+ inside the cell changed after the water enters the cell?
Correct Answers 7mM.
This is bc we have to find liters so: 14mmoles/2 liters = 7mM
A chemical signal will be identified as a hormone if it Correct
Answers is released into the bloodstream for distribution
throughout the body.
A negative feedback loop in thermoregulation means that
Correct Answers the temperature is regulated to stay within a
narrow range
acclimation Correct Answers adaptation of physiological
processes to a given set of environmental conditions when it
happens artifically in a lab setting.
acclimatization Correct Answers adaptation of physio
processes to a given set of environmental conditions when it
occurs naturally.
active transport Correct Answers primary active transport uses
ATP directly o move molecules against their concentration
gradient (opposite direction) (sodium out, potassium in).
Secondary active transport uses energy stored by action of the
, primary active transport. requires input of energy from some
outside source such as a high-energy phosphate bond of ATP
adrenal cortex Correct Answers outer portion of adrenal gland
agonist Correct Answers mimics response of primary
ligand/activates receptor
an example of local control Correct Answers when oxygen
concentration in a tissue decreases. the cells lining the small
blood vessels that bring blood to the area sense the lower
oxygen conc.. and respond by secreating a chemical signal,
where a signal molecule diffuses to nearby muscles in the blood
vessel wall, sending a message to relax.
antagonist Correct Answers blocks response/receptor activity
anterior pituary Correct Answers a true endocrine gland of
epithelial origin derived from embryonic tissue that formed the
roof of the mouth
antiport carriers Correct Answers move substrates in opposite
directions
Autocrine siganling Correct Answers cell secretes a signal to
bind to itself
body's load Correct Answers the amount of substance in the
body aka sodium load
