Knowee
Questions
Features
Study Tools

Bending the caudal end of the isolated spinal cord affects the locomotor net of the lamprey by:Group of answer choicesactivating the motor neurons directlyactivating contralateral inhibitory and ipsilateral excitatory sensory neuronsactivating ipsilateral inhibitory and contralateral excitatory sensory neuronsinhibiting contralateral excitatory sensory neuronsinhibiting the opposite tilt

Question

Bending the caudal end of the isolated spinal cord affects the locomotor net of the lamprey by:Group of answer choicesactivating the motor neurons directlyactivating contralateral inhibitory and ipsilateral excitatory sensory neuronsactivating ipsilateral inhibitory and contralateral excitatory sensory neuronsinhibiting contralateral excitatory sensory neuronsinhibiting the opposite tilt

🧐 Not the exact question you are looking for?Go ask a question

Solution

Bending the caudal end of the isolated spinal cord affects the locomotor net of the lamprey by activating contralateral inhibitory and ipsilateral excitatory sensory neurons.

Here's a step-by-step explanation:

  1. The lamprey's spinal cord is isolated and the caudal (tail) end is bent.

  2. This bending action stimulates sensory neurons in the spinal cord.

  3. The sensory neurons that are activated include contralateral inhibitory neurons (those on the opposite side of the bend) and ipsilateral excitatory neurons (those on the same side as the bend).

  4. The activation of these sensory neurons affects the locomotor net, which is the network of neurons responsible for generating rhythmic motor patterns, such as those used in swimming.

  5. The contralateral inhibitory neurons reduce activity on the side of the body opposite the bend, while the ipsilateral excitatory neurons increase activity on the same side as the bend.

  6. This combination of inhibition and excitation on opposite sides of the body leads to a bending movement in the lamprey, allowing it to navigate its environment.

This problem has been solved

Similar Questions

Question 71 ptsRelease of endogenous serotonin (5-HT) in the lamprey spinal cord leads to:Group of answer choicespartial inhibition of action potential generation in motor neuronsinhibition of calcium-dependent potassium channels in the conditional pacemaker neuronsstimulation of the calcium-dependent potassium channels in the conditional pacemaker neuronsan increase in the frequency of cyclic oscillations of the spinal locomotor networkinhibition of NMDA-receptors on spinal neurons PreviousNext

Question 61 ptsThe slow after-hyperpolarisations (sAHPs) in some spinal neurons of the lamprey:Group of answer choicescontrol the speed of swimmingcontrol the direction of swimmingcontrol the alternation of contractions between the two sidescontrol the sensory inputscontrol the propagation of excitation along the spinal cord

Where are the cell bodies of the neurons that cause NMDA receptor activation to the conditional pacemakers in the spinal circuits of the intact Lamprey during swimmingGroup of answer choicesIn the brain stemIn the visual nucleiIn the vestibular nucleiin the ipsilateral spinal cordin the contralateral spinal cord

Question 81 ptsThe sensory neurons called “edge cells” in the lamprey are best described as being located:Group of answer choicesin the brain stemin swimming muscleson the surface of the spinal cordinside the spinal cordon the surface of the body

Swimming of the lamprey is characterised byGroup of answer choicessynchronous relaxation of muscles of each side.synchronous contraction of one side of the body.propagation of contractions from head to tail.alternation between tail and head contractions.alternation between backward-moving and forward-moving contractions.

1/3

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.