3. In a reflex arc initiated by touching a hand to a hot stove, the effector belongs to whichclass of tissue?a. nervousb. connectivec. muscled. epithelial4. Most of the water in the human body is found in:a. the interstitial fluid compartment.b. the intracellular fluid compartment.Tilec. the plasma compartment.d. the total extracellular fluid compartment.

We have different types of tissues in the body . Each having specialized functions .

Answered: 3. In a reflex arc initiated by…

3. In a reflex arc initiated by touching a hand to a hot stove, the effector belongs to whic class of tissue? a. nervous b. connective c. muscle d. epithelial

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter38: Introduction To Animal Organization And Physiology

Section: Chapter Questions

Problem 9TYK

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An 82-year-old woman is brought to the emergency room complain- ing of nausea, vomiting, muscle cramps, and generalized weakness. Labo- ratory analysis reveals significant hyperkalemia. Elevations of extracellular potassium ion concentration will have which of the following effects on nerve membranes? a. The membrane potential will become more negative b. The sodium conductance will increase c. The potassium conductance will increase d. The membrane will become more excitable e. The Na*-K* pump will become inactivated
Mark the following statements as true or false. If a statement is false, correct it to make a true statement. a. The resting membrane potential refers to the voltage difference across the membranes of excitable cells at rest. b. The concentration of Na+ is highest in the cytosol, and the concentration of K+ is highest in the extracellular fluid. c. The Na+>K+ pumps and gated channels maintain the Na+ and K+ gradients necessary for action potentials to occur. d. A depolarization is a change in membrane potential that makes the potential less negative. e. A local potential is a change in membrane potential that conducts the long-distance signals of the nervous system
Which one is correct about the AP conduction velocity of nerve fiber A. Increase of the temperature within physiological limit will increase the conduction velocity. B. The fiber with big diameter always conducts faster. C. The increase of extracellular K+ will increase the conduction velocity D. Myelination of nerve fiber always decreases the conduction velocity. E. Anesthesia do not influence the conduction velocity.
Andrew was taken to the doctor’s office after he was bitten by a stray dog. The concern was that the dog might be infected with the rabies virus. The rabies virus infects neurons by using which method that normally transports materials from the synaptic knob to the cell body? a. anterograde transport b. fast axonal transport c. slow axonal transport d. All of these are correct.
At rest, a neuron has a lower concentration of sodium than the surrounding fluid. The neuron also has a higher concentration of potassium inside the cell. The sodium-potassium ion pump is used to maintain the neuron in the resting state. Which of the following statements is true? A. Remaining at rest requires the use of ATP. B. Remaining at rest requires an input of sodium. C. Remaining at rest requires the activation of cotransporters. D Remaining at rest requires decreased permeability of the membrane.
Which of the following does not participate in the muco-ciliary apparatus of the conductive zone? O A. Ciliated epithelial cells. O B. Lumen-facing active chloride pump O C. Periciliary fluid O D. Active transepithelial chloride secretion OE. Goblet cells
The resting membrane potential results fromA. uneven distribution of ions across the cell membrane only.B. differences in membrane permeability to Na+ and K+ onlyC. activity of the sodium/potassium pump only.D. uneven distribution of ions across the cell membrane, differences in membrane permeability to Na+ and K+, and sodium/potassium pump activity
The negatively charged intracellular environment and resulting resting membranepotential of neurons and muscle cells fundamentally develops because of:A. the presence of a high extracellular potassium concentration.B. the presence of negatively charged intracellular proteins.C. the high electron concentration found in the extracellular fluidsD. the presence of voltage-gated-sodium channells
3. Explain all the electrical and mechanical events which occur during each measured wave, segment andinterval. An electrical event would be membrane polarization: depolarization, repolarization, restingmembrane potential, hyperpolarization etc; mechanical events include blood flow, open or closed valves,heart sounds, contraction, relaxation, pressure changes, etc. An example of a complete answer for the P waveis given below. Feel free to use your lecture and/or textbook as a reference to make the connections betweenECG and the cardiac cycle. This is a great way to review for the exam and apply what you are learning. P Wave – During the P wave, depolarization is sweeping from the SA node throughout both atria (electricalevent). This leads to the beginning of atrial contraction (mechanical event).PR Interval -P-R Segment –QRS Complex –Q-T Interval –S-T Segment –T Wave –T-P Segment –R-R Interval –
3. Suppose you discover a chemical that can block leak potassium channels. What might happen as a result of this blockage? A) Na might have a larger influence on resting potential B) All of the answers are correct C) The Na/K pump activity might slow D) K would become less permeable
Match each item to the correct statement below. 71. three layers of tough elastic tissue within the skull and spinal column directly enclosing the brain and spinal cord 72. liquid circulating throughout the spaces within the brain and spinal cord 73. occurs when the membrane potential is reduced to less than 70 mV 74. chemical messengers that carry signal from one neuron to another 75. a bundle of white matter linking the cerebral hemispheres 76. occurs when the membrane potential becomes slightly more negative than its original resting potential 77. the connection between two neurons 78. the occurrence when a stimulus causes the axon membrane to depolarize to a certain level 79. thin outer covering of grey matter covering each cerebral hemisphere of the brain 80. protective barrier separating the blood from the CNS f. cerebrospinal fluid g. threshold potential h. depolarization i cerebral cortex j. hyperpolarization a. neurotransmitter b. synapse c. meninges d. blood-brain barrier e.…
The Na/K pump in epithelium cells that line the gut is an example of ______ transport and helps __ Select one: a. active, prevent the movement of Cl- outside the cell b. active, prevent the movement of Cl- inside the cell c. active, prevent the movement of Na+ outside the cell d. passive, prevent the movement of Cl- outside the cell e. passive, prevent the movement of Cl- inside the cell