BIO 336 Sdsu Exam 1 Complete Questions And
Answers 100% Pass
50/50 - ANSWER what is the ratio of phosphate heads to lipid tails in the phospholipid
bilayer
Ryanodine receptor inhibitor causing flaccid paralysis - ANSWER dantrolene (muscle
relaxant)
10 - ANSWER if a person did ten pushups, how many times would calcium ions cycle
between the sarcoplasmic reticulum and the extracellular fluid outside the muscle cell
refractory period (hyperpolarization) - ANSWER what is the main reason that action
potentials travel in only one direction in axons, and don't double back on themselves
amyotrophic lateral sclerosis - ANSWER what disease would not cause damage in the
white matter of the spinal cord
400,000 - ANSWER if a skeletal muscle has 400,000 muscle fibers, one would predict
there would be ___ neuromuscular junctions innervating the muscle fibers
they have more SR than slow-twitch, they have the fast isoform of myosin ATPase. and
they primarily use anaerobic glycolysis to resynthesize ATP from ADP - ANSWER what
helps explain why fast twitch muscles can contract so fast
ECF - ANSWER in a living human being, what area would have a higher calcium level
than that found in the intracellular fluid of muscle cells
used by tropomyosin to cause cross-bridge - ANSWER what is not a function of ATP in
muscle cels
,membrane protein that creates a pore allowing ECF water and ICF fluid to mix -
ANSWER What is an aquaporin?
nonpolar (hydrophobic) - ANSWER Are lipid tails polar or nonpolar?
sodium ions - ANSWER natrium
potassium ions - ANSWER kalium
too much potassium in the blood, causes weakness and heart can stop - ANSWER what
is hyperkalemia
a molecule that inhibits or blocks a neurotransmitter's action - ANSWER what is an
antagonist
enzyme that pumps three sodium ions out of the cell and two potassium ions into the cell
using a single molecule of ATP - ANSWER Na+/K+ ATPase
low sodium in the blood - ANSWER Hyponatremia
normal levels of sodium in the blood - ANSWER eunatremia
from 3.5-5 mmol/L - ANSWER what is the concentration of normal potassium levels in
blood stream
1 adenine, 1 ribose, 3 phosphate groups - ANSWER what makes up adenosine
triphosphate
, Active transporter that moves three Na+ out of a cell and two K+ into the cell against
their respective concentration gradients. - ANSWER What is the Na+/K+ pump?
put a squid in a bathtub, viewed the phospholipid bilayer and determined that resting
membrane potential of all living cells was around -80mv - ANSWER What did Hodgkin
and Huxley do?
Difference in electrical charge across the membrane at rest (-80mv to -70mv) - ANSWER
What is the resting membrane potential?
eject water through their stellate nerve cells - ANSWER how do squids swim
giant axon of a squid stellate cell - ANSWER what was used to determine resting
membrane potential by hodgkins and huxley
poison that antagonizes/stops Na+/K+ ATPase destroying the cell's resting membrane
potential - ANSWER What is ouabain?
hyponatremia (Na+ accumulates inside the cell, K+ accumulates outside the cell) -
ANSWER what does ouabain cause
protein that makes membrane permeable to potassium ions causing the resting
membrane potential to be -80 mv - ANSWER K+ leak channels
inside and outside of the cell are electrically equal - ANSWER what does it mean when
membrane potential is at 0 mv
-50 mV - ANSWER what is the threshold for an action potential
electrical impulse that travels down the axon triggering the release of neurotransmitters
- ANSWER What is an action potential?
Answers 100% Pass
50/50 - ANSWER what is the ratio of phosphate heads to lipid tails in the phospholipid
bilayer
Ryanodine receptor inhibitor causing flaccid paralysis - ANSWER dantrolene (muscle
relaxant)
10 - ANSWER if a person did ten pushups, how many times would calcium ions cycle
between the sarcoplasmic reticulum and the extracellular fluid outside the muscle cell
refractory period (hyperpolarization) - ANSWER what is the main reason that action
potentials travel in only one direction in axons, and don't double back on themselves
amyotrophic lateral sclerosis - ANSWER what disease would not cause damage in the
white matter of the spinal cord
400,000 - ANSWER if a skeletal muscle has 400,000 muscle fibers, one would predict
there would be ___ neuromuscular junctions innervating the muscle fibers
they have more SR than slow-twitch, they have the fast isoform of myosin ATPase. and
they primarily use anaerobic glycolysis to resynthesize ATP from ADP - ANSWER what
helps explain why fast twitch muscles can contract so fast
ECF - ANSWER in a living human being, what area would have a higher calcium level
than that found in the intracellular fluid of muscle cells
used by tropomyosin to cause cross-bridge - ANSWER what is not a function of ATP in
muscle cels
,membrane protein that creates a pore allowing ECF water and ICF fluid to mix -
ANSWER What is an aquaporin?
nonpolar (hydrophobic) - ANSWER Are lipid tails polar or nonpolar?
sodium ions - ANSWER natrium
potassium ions - ANSWER kalium
too much potassium in the blood, causes weakness and heart can stop - ANSWER what
is hyperkalemia
a molecule that inhibits or blocks a neurotransmitter's action - ANSWER what is an
antagonist
enzyme that pumps three sodium ions out of the cell and two potassium ions into the cell
using a single molecule of ATP - ANSWER Na+/K+ ATPase
low sodium in the blood - ANSWER Hyponatremia
normal levels of sodium in the blood - ANSWER eunatremia
from 3.5-5 mmol/L - ANSWER what is the concentration of normal potassium levels in
blood stream
1 adenine, 1 ribose, 3 phosphate groups - ANSWER what makes up adenosine
triphosphate
, Active transporter that moves three Na+ out of a cell and two K+ into the cell against
their respective concentration gradients. - ANSWER What is the Na+/K+ pump?
put a squid in a bathtub, viewed the phospholipid bilayer and determined that resting
membrane potential of all living cells was around -80mv - ANSWER What did Hodgkin
and Huxley do?
Difference in electrical charge across the membrane at rest (-80mv to -70mv) - ANSWER
What is the resting membrane potential?
eject water through their stellate nerve cells - ANSWER how do squids swim
giant axon of a squid stellate cell - ANSWER what was used to determine resting
membrane potential by hodgkins and huxley
poison that antagonizes/stops Na+/K+ ATPase destroying the cell's resting membrane
potential - ANSWER What is ouabain?
hyponatremia (Na+ accumulates inside the cell, K+ accumulates outside the cell) -
ANSWER what does ouabain cause
protein that makes membrane permeable to potassium ions causing the resting
membrane potential to be -80 mv - ANSWER K+ leak channels
inside and outside of the cell are electrically equal - ANSWER what does it mean when
membrane potential is at 0 mv
-50 mV - ANSWER what is the threshold for an action potential
electrical impulse that travels down the axon triggering the release of neurotransmitters
- ANSWER What is an action potential?
