Homework Answers
It would depolarize the resting membrane potential and move it closer to threshold without trigerring an action potential.
If the plasma membrane of a muscle cell is lysed during dissection, it would result in decreased activity of the Na+-K+ ATPase electrogenic pump. This would result in the depolarization of resting membrane potential. The Na+-K+ ATPase acts to produce a net negative charge in the cell by pumping three sodium ions out and two potassium ions in.
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If the plasma membrane (sarcoplasma) of a muscle cell were lysed (broken open) during dissection, how...
2. Hypokalemia of the interstitial fluid and plasma has which of the following effects on an...
2. Hypokalemia of the interstitial fluid and plasma has which of the following effects on an excitable cell such as muscle or nerve (Circle one answer from each grouping on three choices) (10 Points) A. The cell is more likely to Depolarize B. The cell is more likely to Hyperpolarize C. The cell is no more likely either to Depolarize or Hyperpolarize D. The cell's resting membrane potential is less negative E. The cell's resting membrane potential is more negative...
Which of the following statements about skeletal muscle contraction is false? During muscle contraction, the Z...
Which of the following statements about skeletal muscle contraction is false? During muscle contraction, the Z discs move closer together as the myosin heads move toward the plus ends of the actin filaments. The changes in voltage across the plasma membrane that occur when a muscle cell receives a signal from the nervous system causes Ca2+ to flow into the sarcoplasmic reticulum, triggering a muscle contraction. An action potential in the muscle cell plasma membrane leads to voltage-gated calcium channels...
Cell # 1 forms an excitatory synapse onto cell # 2 , when cell #1 fires a single action potential...
Cell # 1 forms an excitatory synapse onto cell # 2 , when cell #1 fires a single action potential it releases glutamate onto the membrane of cell #2 resulting in a 5 millivolt depolarization, a 5 mV excitatory postsynaptic potential, when cell #1 fires three action potentials in rapid succession this causes a 15 mV depolarization in cell #2 resulting in cell #2 reaching threshold and firing its own action potential. Cell #1 Cell #2 +40 Vm IN Cell...
This time you get into a snail brain neuron that is completely quiet. The cell doesn't...
This time you get into a snail brain neuron that is
completely quiet. The cell doesn't even begin to fire action
potentials when you inject depolarizing current, so you question
yourself if you are actually in a neuron. Nevertheless, you briefly
hyperpolarize thecell, and right after the hyperpolarization stops,
the cell fires a few action potentials that have a quite large
amplitude and then the cell becomes quite again. What could be
going on here? Your traces kind of look...
Please help me with several of these questions, thank you very much. 1. During the propagation...
Please help me with several of these questions, thank you very much. 1. During the propagation of an action potential along the axon of a neuron, what is happening at the leading edge (the front) of the region of depolarization as it moves down the axon? a. Ligand-gated Na+channels are opening. b. Voltage-gated Na+channels are opening. c. Ligand-gated K+channels are opening. d. Voltage-gated Na+channels have become inactive and refractory. e. Voltage-gated Na+channels are closing. 2. During transcellular transport of glucose...
all of them please Question z pus Action potential. How is the cell membrane able to...
all of them please
Question z pus Action potential. How is the cell membrane able to repolarize back to rest? influx of Na+ currents efflux of K+ currents influx of K+ currents efflux of Na+ currents Question 6 2 pts Neurons that convey motor commands to the bladder are visceral motor somatic motor visceral sensory somatic sensory Question 7 2 pts Action potential. During hyperpolarization the cell membrane is in a state of relative refractory period. the cell membrane is...
For each multiple choice, what is the answer and why? 5. Myelin A) is only found...
For
each multiple choice, what is the answer and why?
5. Myelin A) is only found in the peripheral nervous system B) is secreted from the axon terminals of autonomic neurons. C) is a carbohydrate within the membranes of some neuroglia. D) is a chemical present in the plasma membrane of neurons. E) influences the rate of conduction of an electrical signal down an axon. 6. Which of the following organs/structures is (are) innervated by somatic motor nerves? (only ONE...
Discard the answers I chose Match the following scenarios with the most specific type of transport...
Discard the answers I chose
Match the following scenarios with the most specific type of transport used. Some choices may be used more than once. A A white blood cell enguits a bacterial cell A A paramecium swims close to some debris, wraps its membrane around the debris, and pulsit inside, creating a food Vacuole D. An amoeba wraps its cell membrane around a region of dissolved nutrients in water and pulls it inward, making a small vacuole A Phagocytosis...
During the aerobic metabolism of glucose, glucose is ____________. Reduced to form water Oxidized to form...
During the aerobic metabolism of glucose, glucose is ____________. Reduced to form water Oxidized to form water Reduced to form CO2 Oxidized to form CO2 Which of the following describes the equation: FAD + XH2 à FADH2 + X. FAD is reduced to FADH2 It is a coupled reduction – oxidation reaction XH2 is oxidized to X All of the above Which of the following is FALSE about glycolysis? The initial steps of glycolysis requires energy derived from the splitting...
Energy in the from the sun, and store that enerngy as . Plants are able to captone chemical bonds...
check the answer plz
energy in the from the sun, and store that enerngy as . Plants are able to captone chemical bonds of glucose. a potential:potential kinetic the following is a funsction of cholesterol in the plasma nuidity of the membr passage of substances into and out of the cell d prodection of the membrane prokhryotic or eukaryotic? 9. If you found a iey cell under a microscope how could you determine if that cell was of a a....
2. Hypokalemia of the interstitial fluid and plasma has which of the following effects on an excitable cell such as muscle or nerve (Circle one answer from each grouping on three choices) (10 Points) A. The cell is more likely to Depolarize B. The cell is more likely to Hyperpolarize C. The cell is no more likely either to Depolarize or Hyperpolarize D. The cell's resting membrane potential is less negative E. The cell's resting membrane potential is more negative...
Which of the following statements about skeletal muscle contraction is false? During muscle contraction, the Z discs move closer together as the myosin heads move toward the plus ends of the actin filaments. The changes in voltage across the plasma membrane that occur when a muscle cell receives a signal from the nervous system causes Ca2+ to flow into the sarcoplasmic reticulum, triggering a muscle contraction. An action potential in the muscle cell plasma membrane leads to voltage-gated calcium channels...
Cell # 1 forms an excitatory synapse onto cell # 2 , when cell #1 fires a single action potential it releases glutamate onto the membrane of cell #2 resulting in a 5 millivolt depolarization, a 5 mV excitatory postsynaptic potential, when cell #1 fires three action potentials in rapid succession this causes a 15 mV depolarization in cell #2 resulting in cell #2 reaching threshold and firing its own action potential. Cell #1 Cell #2 +40 Vm IN Cell...
This time you get into a snail brain neuron that is
completely quiet. The cell doesn't even begin to fire action
potentials when you inject depolarizing current, so you question
yourself if you are actually in a neuron. Nevertheless, you briefly
hyperpolarize thecell, and right after the hyperpolarization stops,
the cell fires a few action potentials that have a quite large
amplitude and then the cell becomes quite again. What could be
going on here? Your traces kind of look...
all of them please
Question z pus Action potential. How is the cell membrane able to repolarize back to rest? influx of Na+ currents efflux of K+ currents influx of K+ currents efflux of Na+ currents Question 6 2 pts Neurons that convey motor commands to the bladder are visceral motor somatic motor visceral sensory somatic sensory Question 7 2 pts Action potential. During hyperpolarization the cell membrane is in a state of relative refractory period. the cell membrane is...
For
each multiple choice, what is the answer and why?
5. Myelin A) is only found in the peripheral nervous system B) is secreted from the axon terminals of autonomic neurons. C) is a carbohydrate within the membranes of some neuroglia. D) is a chemical present in the plasma membrane of neurons. E) influences the rate of conduction of an electrical signal down an axon. 6. Which of the following organs/structures is (are) innervated by somatic motor nerves? (only ONE...
Discard the answers I chose
Match the following scenarios with the most specific type of transport used. Some choices may be used more than once. A A white blood cell enguits a bacterial cell A A paramecium swims close to some debris, wraps its membrane around the debris, and pulsit inside, creating a food Vacuole D. An amoeba wraps its cell membrane around a region of dissolved nutrients in water and pulls it inward, making a small vacuole A Phagocytosis...
check the answer plz
energy in the from the sun, and store that enerngy as . Plants are able to captone chemical bonds of glucose. a potential:potential kinetic the following is a funsction of cholesterol in the plasma nuidity of the membr passage of substances into and out of the cell d prodection of the membrane prokhryotic or eukaryotic? 9. If you found a iey cell under a microscope how could you determine if that cell was of a a....
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