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Electrical Communication in the Human Body Part 2 Flashcards | StudBud
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Electrical Communication in the Human Body Part 2
Electrical Communication in the Human Body Part 2
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Answers
1
What membrane protein is responsible for restoring the original concentration of Na+ and K+?
Na+/K+ Pump
K+ channel
Na+ channel
none of these
2
What do we call electrical messages that are sent down the axon of a neuron?
reaction time
electricity
action potential
neurotransmitters
3
What happens in deplorization during action potential?
the inside of the cell becomes positive
the outside of the neuron has no charge
the outside of the neuron is positive
returns the cell to resting potential
4
What is the main difference between reflex and voluntary action?
voluntary actions only use muscles
reflexes don't use the brain while voluntary actions do
there are no differences
reflexes use the brain while voluntary actions don't
5
What does hydrophobic mean?
none of these are correct
tendency to repel water
tendency to bind to water trhough another molecule
tendency to mix with water
6
Our body quits making _____ after our brain is fully developed.
neurons
ADH
cells
bones
7
What is the nerve pathway involved in a reflex action?
reflex arc
reflex circle
bireflex
unireflex
8
What is the function of the membrane of an axon?
to eat all other axons
to fight off infections
to protect the ions inside
to protect the cell from its surroundings
9
At the cross section of the spinal cord, what does the sensory neuron do?
sends signals to relay neurons
drops off its information into the bone
sends signals to more sensory neurons
sends signals to motor neurons
10
_______ _____ can affect electrical communication in the human body.
playing football
laying down
mental disabilties
eating bacon
11
What does hydrophilic mean?
none of these are correct
tendency to repel water
tendency to mix with water
tendency to bind to water through another molecule
12
Phospholipids have a ________ head and a ________ tail.
hydrophilic; hydrophilic
hydrophilic; hydrophobic
hydrophobic; hydrophilic
hydrophobic; hydrophobic
13
Is the Na+/K+ pump via active or passive transport?
passive
active
neither
14
How do you stop action potential?
by blocking the Na+/K+ pump
you can't stop it
by blocking K+ channels
by blocking Na+ channels
15
How does the location of Na+ and K+ ions relate to the overall membrane potential?
cell interior = + cell exterior = -
cell interior = - cell exterior = +
cell interior = + cell exterior = +
cell interior = - cell exterior = -
16
Which is NOT a step in voluntary action?
brain tells the muscles to move accordingly
brain figures out the sound, touch, etc
brain anticipates a sound, touch, etc
brain tells the heart to continue pumping
17
When were neurons first developed?
when our muscles were first developed
when our cortex was first developed
when our heart was first developed
when our spinal cord was first developed
18
What causes the inside of a membrane of an axon to reverse charge and begin action potential?
k+ channels close
Na+ channels open
k+ channels open
Na+ channels close
19
What happens when the action potential reaches the end of the axon at the axon terminals?
vesicles work to gather neurotransmitters
none of these is correct
vesicles get ready to release neurotransmitters
the axon terminals shrink
20
Do neurotransmitters act as a stimuli when they enter the receptors of a new cell?
Sometimes
No
Yes
