OL Quiz 7: Nervous Tissue

answer item 4 only.

Question 2 Select one answer.  Which of the following is not a function of a Satellite glial cell?  a. Protect/cushion neuron cell bodies  b. Regulate the chemical environment  c. Supply nutrients to surrounding neurons  d. Conduction of nervous impulses along axons    Question 3 Select one answer.  Which of the following is not characteristic of white matter?  a. It is the tissue through which messages pass between different areas of gray matter  b. Made up of neuronal cell bodies  c. Responsible for modulation of the distribution of action potentials  d. Composed of bundles of myelinated nerve cell processes

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I. These forms the specialized junctions called synapse. A. Cell body B. Glial cells C. Synaptic terminal D. Neurotransmitters II. These are the gaps in the myelin sheath which is the site where signals are recharged as they travel down the axon. A. Neurotransmitters B. Axon hillock C. Dendrites D. Nodes of Ranvier III. These neurons form the local circuits that connect neurons in the brain A. Interneurons B. Axon hillock C. Dendrites D. Soma

What's the answer to number 2

histology i want to solve all parts

Skin 1 Spinal cord 4 3 2 A neuron was isolated from structure number 3 in the diagram above. When comparing the velocity of action potentials, structure numbered 3 is much slower than that of structure numbered 4. Which of the following explains why this is? Select one: a. Structure number 4 has a larger diameter than structure number 2. b. Structure number 4 does not have myelin sheaths. c. Structure number 3 does not have myelin sheaths. d. Structure number 3 has a larger diameter than structure number 4.

Help me label this

4. Which term describes the cell membrane potential of a neuron at rest? a. polarized  b. depolarized  c. hyperpolarized d. repolarized  e. sympolarized

54 MS is a disabling disease that disrupts the communication between the brain and the body when the immune system attacks the protective sheaths (myelin) of the axons. Which cells are likely involved in this process? Select one or more: O a. Astrocytes b. Вірolar cells O c. Oligodendrocytes d. Schwann cells O e. Microglia O f. Dendrites O g. Astroglia

A. Match the neuroglia cell with the correct function. A. Astrocytes B. Microglia C. Ependymal D. oligodendrocytes E. Schwann cells F. satellite cells 11. Cells that produce the myelin in the PNS. 12. Cells that produce the myelin in the CNS. 13. Phagocytes that dispose of debris such as dead brain cells and bacteria. 14. Anchors and braces neurons with cellular projections. 15. Cells have cilia that help circulate the cerebrospinal fluid. 16. Cells help cushion and protect neurons in the PNS. Cells serve as a medium for diffusion between capillaries and neurons. 17. Cells line cavities of the brain and spinal cord 18. onor that are sunnosed to be added to a plant in order to achieve the following

1. Henry was extremely scared from an exposure to a scary haunted experience. Thus, the constant “goose bumps” in the skin. This is a manifestation of what muscle tissue? a. cardiac b. skeletal c. smooth d. irregular 2. Neurons transmit information in the form of action potentials. Regarding neurons, which does NOT belong? a. cell body b. dendrites c. microvilli d. axons

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Label Figure 7.1 by choosing the letter of the part for each item.

Please note these are all one question group and should be answered as such!   Which of the following statements accurately defines epineurium?   A. Fluid-filled space at a synapse through which neurotransmitters diffuse   B. A vesicle containing neurotransmitters in the axon terminal of a neuron   C. The CT sheath that binds together the groups of fascicles, blood vessels, and lymphatic vessels in a peripheral nerve   D. The branch of the ANS that adapts the body for rest and digestion Which of the following statements accurately defines sacral plexus?   A. The ventral rami of C1–C4 (and a small contribution from C5) that serve the head and neck   B. The ventral rami of L1–L4 that serve the pelvis and lower limb   C. The ventral rami of C5–T1 that serve the upper limb   D. The ventral rami of L4–S4 that serve the pelvis and lower limb

Plz answer correctly asap

4 When a neurotransmitter binds to its receptor and increases the permeability of the postsynaptic membrane to sodium ions,A: the membrane will be hyperpolarized.B: more chloride ions will also diffuse into the cell.C: an excitatory postsynaptic potential (EPSP) will result.D: the membrane will become impermeable to potassium ions.

A. Match the neuroglia cell with the correct function. D. oligodendrocytes A. Astrocytes B. Microglia C. Ependymal E. Schwann cells F. satellite cells 11. Cells that produce the myelin in the PNS. 12. Cells that produce the myelin in the CNS. 13. Phagocytes that dispose of debris such as dead brain cells and bacteria. 14. Anchors and braces neurons with cellular projections. 15. Cells have cilia that help circulate the cerebrospinal fluid. 16. Cells help cushion and protect neurons in the PNS. 17. Cells serve as a medium for diffusion between capillaries and neurons. 18. Cells line cavities of the brain and spinal cord to achieve the following

Identify whether the statement is TRUE or FALSE   1. The tightly packed coil of neurolemmocyte membrane that encircles certain kinds of axons is called a node.   2. Depolarization of the membrane of a nerve cell occurs by the rapid influx of organic ions.   3. In a resting neuron the outside is negatively charged.   4. The interior surface of a membrane of a nonconducting neuron differs from the exterior surface in that the former is negatively charged and contains more sodium.

Please answer this multiple choice question?

Name please!!

2. Voltage gated Na+ channels have three state: open, closed and inactivated. Observe the following diagram of a neuron. The place marked with a "X" is where an action potential has just occurred. The circle marks where an action potential is about to occur. а. At each arrow in the diagram, A, B & C, indicate whether voltage gated Na+ channels are open, closed or inactivated. C b. What would happen if you inserted an electrode in the middle of an axon that is at rest, and thereby induced a change in the membrane potential at that location to make it -40mV? Would an action potential result? Yes or No. If Yes, how would this be similar or different from a normal action potential? Explain briefly. What would happen if you inserted an electrode in the middle of an axon that is at rest, and thereby induced a change in the membrane potential at that location to make it -60mV? Would an action potential result? Yes or No. If Yes, how would this be similar or different from a normal action…

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6. Which of the following combinations correctly identifies properties of a type of neuron? J K L 3 .M Neuron Metabolic rate Sensory Motor Interneuron Motor Structure 0 Long axons 10 Long axons Short axons Short axons 7. The graph below shows the effect of environmental temperature on the metabolic rate of a small animal. Function Transmit nerve impulses to the central nervous 20 system Relay nerve impulses from sensory to interneurons Relay nerve impulses from motor to sensory neurons Transmit nerve impulses to the peripheral nervous system 30 40 Environmental temperature (°C) Which of the following is a tolerance limit of the animal? J 5°C K 20°C L 30°C M 50°C Dan) 82T 50

5. What's the function of the sodium-potassium pump in the nervous system? A. Transport sodium and potassium ions to form the nodes of Ranvier. B. Package sodium and potassium ions into synaptic vesicles. C. Let sodium and potassium ions flow across the membrane during an action potential. D. Use sodium and potassium ions to establish the membrane potential of a neuron

1. The graph above represent time in milliseconds.  At what time (in milliseconds) is the inside of the neuron the most positive and why? 2. Explain why the membrane potential changes at X 3. Explain what is happening at point C to the sodium and potassium ions and how this is affecting the membrane potential 4. Describe two things that contribute to the resting membrane potential

20. The presence of cholinesterase in the human nervous system allows a. One way impulse transmission b. More rapid impulse conduction c. Arecovery period by destroying acetylcholine d. Acetylcholine to continue stimulating dendrites 21. The threshold of a neuron refers to a. The polarity of 0.07 mV b. The minimum stimulus required to achieve depolarization c. The stimulus needed to achieve equal concentrations of sodium ions and potassium ions within the neuron d. The stimulus needed to achieve sodium ion equilibrium between the cytoplasm and extracellular fluid (ECF)