BIO 235 FINAL EXAM LATEST
the part of aneuron that carries action potentials is called a ___.
a)axon
b)schwann cell
c)dendrite
d)naurolemma - ANSWERS-a)axon
the following are the main steps in the generation of a action potential
1. voltage-gated sodium channels inactivate
2. voltage-gated potassium channels open
3. potassium moves out o he cell hyper polarizing neuron to -90 mV
4. neuron membrane is depolarized to threshold
5. neuron membrane potential returns to rest
6. voltage gated sodium channels open
a) 2,4,6,7,1,3,5,
b)6,7,4,1,2,3,5
c)4,2,5,6,7,3,1
d) 4,6,7,1,2,3,5
e) 4,6,7,3,2,5,1 - ANSWERS-d) 4,6,7,1,2,3,5
END OF
PAGE
1
, BIO 235 FINAL EXAM LATEST
when two EPSPs produced by the same pre-synaptic neuron occur close
enough togherer to inreas the magnitude of the resulting depolarization
this is known as ____.
a) spatial summation
b)tetanus
c)treppo
d)temporal summation - ANSWERS-d)temporal summation
somatic motore neurons relese ___ onto skeletal muscle fibers
a) glutamate
b)epinephrin
c)norepinephrine
d)acetyle cholin - ANSWERS-d)acetyle cholin
which of the following is the most common excitatory neurotransmitter
in the brains?
a)glycine
b)glutamate
c)noradrenaline
END OF
PAGE
2
, BIO 235 FINAL EXAM LATEST
d)gamma aminobutyric acid
e) serotoniin - ANSWERS-b)glutamate
which of the following reveptors are glutamate gated cation channels
and are also very important in the molecular mechanim for memory
a)NMDA recpeorts
b)mGluR's
c)GABA b receptors
d)Glycine receptors - ANSWERS-a)NMDA recpeorts
Neurotransmitter in the axon terminal is stored in synaptic
a)vesicles
b)mitochondria
c)neurosomes
d)knobs - ANSWERS-a)vesicles
a cell or organ that responds to commands of the control center in
negative feedback is termed n
a)hypothalamus
END OF
PAGE
3
, BIO 235 FINAL EXAM LATEST
b)effector
c)stimulus
d)thermoregulator
e)receptor - ANSWERS-b)effector
which of the following does not contribute to the fact that the membrane
potential is negative
a)leaky potassium channels
b)lots o intracellular proteins that are negatively charged
c) lots of extracellular proteins that are positivily charged
d) Na+/K+ ATPase - ANSWERS-c) lots of extracellular proteins that are
positivily charged
organ system that protects the body against injury and dehydration and is
also important in the regulation of temperature
a)urinary system
b)digestive system
c)integumentary system
d) reproductive system
e) nervous system - ANSWERS-c)integumentary system
END OF
PAGE
4
the part of aneuron that carries action potentials is called a ___.
a)axon
b)schwann cell
c)dendrite
d)naurolemma - ANSWERS-a)axon
the following are the main steps in the generation of a action potential
1. voltage-gated sodium channels inactivate
2. voltage-gated potassium channels open
3. potassium moves out o he cell hyper polarizing neuron to -90 mV
4. neuron membrane is depolarized to threshold
5. neuron membrane potential returns to rest
6. voltage gated sodium channels open
a) 2,4,6,7,1,3,5,
b)6,7,4,1,2,3,5
c)4,2,5,6,7,3,1
d) 4,6,7,1,2,3,5
e) 4,6,7,3,2,5,1 - ANSWERS-d) 4,6,7,1,2,3,5
END OF
PAGE
1
, BIO 235 FINAL EXAM LATEST
when two EPSPs produced by the same pre-synaptic neuron occur close
enough togherer to inreas the magnitude of the resulting depolarization
this is known as ____.
a) spatial summation
b)tetanus
c)treppo
d)temporal summation - ANSWERS-d)temporal summation
somatic motore neurons relese ___ onto skeletal muscle fibers
a) glutamate
b)epinephrin
c)norepinephrine
d)acetyle cholin - ANSWERS-d)acetyle cholin
which of the following is the most common excitatory neurotransmitter
in the brains?
a)glycine
b)glutamate
c)noradrenaline
END OF
PAGE
2
, BIO 235 FINAL EXAM LATEST
d)gamma aminobutyric acid
e) serotoniin - ANSWERS-b)glutamate
which of the following reveptors are glutamate gated cation channels
and are also very important in the molecular mechanim for memory
a)NMDA recpeorts
b)mGluR's
c)GABA b receptors
d)Glycine receptors - ANSWERS-a)NMDA recpeorts
Neurotransmitter in the axon terminal is stored in synaptic
a)vesicles
b)mitochondria
c)neurosomes
d)knobs - ANSWERS-a)vesicles
a cell or organ that responds to commands of the control center in
negative feedback is termed n
a)hypothalamus
END OF
PAGE
3
, BIO 235 FINAL EXAM LATEST
b)effector
c)stimulus
d)thermoregulator
e)receptor - ANSWERS-b)effector
which of the following does not contribute to the fact that the membrane
potential is negative
a)leaky potassium channels
b)lots o intracellular proteins that are negatively charged
c) lots of extracellular proteins that are positivily charged
d) Na+/K+ ATPase - ANSWERS-c) lots of extracellular proteins that are
positivily charged
organ system that protects the body against injury and dehydration and is
also important in the regulation of temperature
a)urinary system
b)digestive system
c)integumentary system
d) reproductive system
e) nervous system - ANSWERS-c)integumentary system
END OF
PAGE
4
