You touch a hot stove and withdraw your hand before you perceive the pain. Identify the neural pathway involved in this response. a. stimulus --> motor neuron --> interneuron --> brain --> sensory neuron b. stimulas --> sensory neuron --> interneuron --> brain --> motor neuron c. effector --> sensory neuron --> interneuron --> brain --> motor neuron --> stimulus d. effector --> motor neuron --> interneuron --> sensory neuron --> stimulas e. stimulas --> sensory neuron --> interneuron --> motor neuron

You touch a hot stove and withdraw your hand before you perceive the pain. Identify the neural pathway involved in this response. a. stimulus --> motor neuron --> interneuron --> brain --> sensory neuron b. stimulas --> sensory neuron --> interneuron --> brain --> motor neuron c. effector --> sensory neuron --> interneuron --> brain --> motor neuron --> stimulus d. effector --> motor neuron --> interneuron --> sensory neuron --> stimulas e. stimulas --> sensory neuron --> interneuron --> motor neuron

3-2-1 Code It

6th Edition

ISBN:9781337660549

Author:GREEN

Publisher:GREEN

Chapter18: Cpt Medicine

Section: Chapter Questions

Problem 4MC

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When Sperry cut a newt’s optic nerve and turned the eye upside down, what happened?A. Axons of the optic nerve grew randomly and attached diffusely to target cells.B. Axons of the optic nerve grew back to their original targets.C. Axons of the optic nerve grew back to targets appropriate to their new location in the eye.D. At first the axons grew back randomly, but then they established appropriate connections by learning.
Match the term to its description by writing the appropriate letter in the space. ___1. Lateral inhibition ___2. Ganglion cells ___3. Lateral geniculate nucleus ___4. Superior colliculus ___5. End-stopped cells ___6. Bipolar cells ___7. Complex cells ___8. Selective adaptation ___9. Selective rearing ___10. Accommodation ___11. Horizontal cells ___12. Simple cells A. Area responsible for controlling eye movements B. Respond best to moving bars of a specific orientation C. The axons of these form the optic nerve D. Results in decreased sensitivity to the exposed stimulus E. Where visual information travels before reaching V1 F. Signals transmitted across a nerve circuit G. Respond best to bars of a particular orientation H. When the lens changes shape to focus I. Carry inhibitory signals between bipolar cells J. Long-term exposure to an environment resulting in neural plasticity K. Respond best to corners or lines of a particular length L. Receive signals from rods and cones
If a kitten has one eye shut for its first few weeks of life, its visual cortex becomes insensitive to that eye. Why? a. The receptors die. b. Any axon that is not used for that long becomes unable to respond. c. Activity from the active eye displaces synapses from the inactive eye.
a) What channels are open at 3 if this was recorded on the axon of a sensory neuron? 1. K+ voltage gated channels/ 2. K+ leak channels/ 3. Na+ ligand gated channels/ 4. Na+ stimulus gated channels/ 5. Na+ voltage gated channels/ 6. Ca+ voltage gated channels/ 7. Cl- ligand gated channels) b) What effect would a weaker stimulus have on C? 1. Greater amplitude (height)/ 2. Lower amplitude/ 3. Narrower curve/ 4. No change/ 5. Wider curve c) What term is used to describe the dip at the region marked by 4? What is its purpose?
Suppose you suffer a cut through the spinal cord on the left side only. For the part of the body below that cut, you will lose pain sensation on the right side of the body and touch sensation on the left side. Why?A. The left side of the body is more sensitive to pain than the right side is.B. The right side of the body is more sensitive to pain than the left side is.C. Pain axons cross the spinal cord at once, but touch fibers do not.D. Pain axons regrow after injury, but touch axons do not
What happens if we cover the entire receptive field of an off-center, on-surround ganglion cell with light? A) The cell produces a moderate amount of action potentials, similar to when it is in the dark. B) The cell initially becomes more active, because light is now present, but then reduces its activity quickly. C) The cell becomes much less active than it is in the dark. D) The cell becomes much more active than it is in the dark.
In complete darkness, why are there no neural signals being sent to the brain by the retinal ganglion cells? A. glutamate release from rods stimulates the retinal ganglion cells B. glutamate release from rods stimulates bipolar cells which then inhibit retinal ganglion cells C. glutamate release from rods is reduced which then fails to excite retinal ganglion cells D. glutamate release from rods inhibits the bipolar cells which then inhibit retinal ganglion cells
Certain cells in the retina respond differently to the direction in which objects move. To understand how cells in the retina respond to different visual stimuli, the activity of a retinal ganglion cell was measured while a square moved across its visual field. Which statement best explains the increases in voltage during the periodic spikes? A. Depolarization of a neuron past a threshold voltage causes sodium channels to close. B. Depolarization of a neuron past a threshold voltage causes sodium channels to open. C. Depolarization of a neuron past a threshold voltage causes potassium channels to close. D. Depolarization of a neuron past a threshold voltage causes potassium channels to open.
What effect would a WEAKER stimulus have on C? a. Greater amplitude (height) b. Lower amplitude c. Narrower curve d. No change e. Wider curve
Tristan accidentally touches a hot propane torch. He immediately withdraws his hand and then exclaims “ouch!” Why did Tristan exclaim “ouch!” after he had withdrawn his hand from the hot coffee? Select one: a. The threshold of the sensory receptor was exceeded and an action potential to the brain could not be triggered. b. The neural processing is faster through the spinal cord than the processing involving the brain. c. The sensory receptors in the fingers were damaged by the hot torch and were not able to send a fast signal to the brain. d. The hot torch triggered too many receptors and resulted in an excessive number of nerve impulses travelling to the brain. The brain was not able to process all the signals fast enough.
The brain knows whether an incoming nerve impulse is light, sound, or pain because of thea. nature of the sensory receptor.b. frequency of the sensory signal.c amplitude of the sensory signal.d. wiring to specific CNS locations.
Before we conclude that mirror neurons help people imitate, which of the following should research demonstrate?A. Mirror neurons respond to both seeing and hearing someone else’s movement.B. Mirror neurons occur in the same brain areas of humans as in monkeys.C. Mirror neurons have different properties for people from different cultures.D. Mirror neurons develop their properties before children start to imitate.