Neurotransmitters make their way to terminal boutons from the cell body O by diffusion from a high concentration in the soma to low concentration at the terminal boutons. through an action potential. packed in vesicles and moved down along the axoplasmic transport. carried by transporter enzymes known as transportase. 19

Neurotransmitters make their way to terminal boutons from the cell body O by diffusion from a high concentration in the soma to low concentration at the terminal boutons. through an action potential. packed in vesicles and moved down along the axoplasmic transport. carried by transporter enzymes known as transportase. 19

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 7UC: Describe the contribution of each of the following to establishing and maintaining membrane...

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Neurons have long thin processes called axons, structuresspecialized for conducting signals throughout the organism’s nervous system. Some axonal processes can be as long as 2 m—for example, the axons that originate in your spinal cord and terminate in the muscles of your toes. Small membrane-enclosed vesicles carrying materials essential to axonal function move along microtubules of the cytoskeleton, from the cell body to the tips of the axons. If the average velocity of a vesicle is 1 μm/s, how long does it take a vesicle to move from a cell body in the spinal cord to the axonal tip in the toes?
QUESTION 1 Gap junctions are involved in O endocrine none of the other choices O neural paracrine QUESTION 2 Potassium ions enter a cell by active transport, diffusion O diffusion, diffusion active transport, active transport O diffusion, active transport QUESTION 3 O altering transcription signaling. Compared to water-soluble signals, lipid-soluble signals are more likely to produce their effects on the target cell by: activating enzymes at the plasma membrane opening or closing ion channels QUESTION 4 and exit a cell by Opening potassium ion channels in a neuron will lead to the cell interior becoming: less negative, which is hyperpolarization less negative, which is depolarization more negative, which is hyperpolarization O more negative, which is depolarization
What happens across the membrane of an electricallyactive cell is a dynamic process that is hard to visualizewith static images or through text descriptions. View thisanimation (http://openstaxcollege.org/l/dynamic1) toreally understand the process. What is the differencebetween the driving force for Na+ and K+? And what issimilar about the movement of these two ions?
cell communication through plasma membrane What are the 4 types-of receptors and their downstream pathways. Draw a quick sketch of each step with a quick description
What involves the extension of an actin-rich lead-ing edge at the front of the cell, the formation of focal adhe-sions that move backward with respect to the cell, and their subsequent release, combined with rear contraction to pushthe cell forward
Which of the following regarding the sodium potassium pump is FALSE? It tends to be found on the apical plasma membrane of polarized cells It transports three sodium ions to the outside of the cell It transports two potassium ions to the inside of the cell. It helps to maintain unequal distribution of ions across the plasma membrane
This type of cell transport happens during secretion of hormones, neurotransmitters and digestive enzymes.
Chloride ions (Cl-) are in higher concentration outside of the cell compared to the intracellular fluid (ICF). If a cell is at rest and chloride-specific ion channels open, identify what would happen. Choose ALL of the correct answers. 1 Some chloride will enter the cell, but the concentration gradient for chloride will not change much. 2 The membrane will hyperpolarize 3 Chloride will come into the cell until it reaches chemical equilibrium. 4 The membrane potential won't change. 5 The membrane will depolarize 6 Some chloride will leave the cell, but the concentration gradient for chloride will not change much
Flippases help maintain membrane asymmetry. True False
Define anterograde axoplasmic transport. Why is this type of axonal transport necessary in most neurons? And, briefly describe the molecules involved in facilitating anterograde transport 2
Name the membrane transport mechanism that Ca2* would most likely use to diffuse across the membrane. O simple diffusion O active transport O facilitated diffusion O vesicular transport O more than one of the above
At this point, go over your answers to the activit ies given earlier in this lesson before you fill out the table below. Table 20: Interdependence of Function and Fom in the Cell Membrane Which components of the cell membrane enable it to perform this function? Function of the Cell Membrane How do these components help the cell membrane in performing this function? iully control the passage of substances through its membrane. However, all activit ort, involve energy. This leads us to another characte As stated in the first section of this lesson, maintaining homeostasis requires ise this in powering