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What route does the reflex arc travel when the pupil changes with variations in light intensity?
Wiki User
∙ 11y ago
The pupillary light reflex arc begins in the retina. Considerable evidence exists that the visual cells of the retina, that is, the rods and cones, also serve as light receptors controlling pupillomotor activity. [ Fibers originating from the nasal neuroreceptor cells decussate in the optic chiasm to the opposite optic tract, whereas the temporal fibers continue in the homolateral optic tract
Wiki User
∙ 11y ago
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Directional stability is said to be the steadiness with which a car?
Correct Answer: Follows the path chosen by the driverFor purposes or driving courses.
What occur during reflex arc?
Definitions: 1. afferent neuron - sensory nerve 2. efferent neuron - motor nerve 3. monosynaptic - see below There are different types of reflexes but the simplest type is a monosynaptic reflex. This means the afferent neurons connect directly to the efferent neurons. For example the knee jerk reflex is a monosynaptic reflex: 1. The patellar tendon is stretched. 2. The afferent neuron (which has stretch sensors) send a signal up to the spinal cord. 3. In the spinal cord at the synapse. The electrical signal is changed to a chemical signal. 4. Chemical messengers travel across the synapse and stimulate the efferent neuron. 5. The efferent neuron changes these signals into electrical signals which travel down to the quadriceps muscle. 6. There is another synapse connecting the nerve to the muscle. chemical messengers travel across the synapse and stimulate the muscle to contract.
What part of the ear changes the sound waves that travel down your ear into vibrations?
the middle ear
Which hormone is regulated by a neuroendocrine reflex?
The neuroendocrine reflex is initiated by stimulation of sensory neurons that cause a release of a neurohormone from the neurosecretory cells. It is the simple neural reflex that controls the neuroendocrine reflex. The natural progression of events in this system is sensory nerves respond to a stimulus, be it thermal, tactile, or visual. These sensory nerves then synapse with interneurons in the spinal cord. Where efferent neurons, or neurons conducting impulses outwards from the brain or spinal cord, travel to the hypothalamus where the hypothalamic neurons release neurohormones. These neurohormones then enter the blood and activate the target tissues, such as the anterior lobe of the pituitary, mammary glands, or the epididymis. Senger, P.L. Pathways to Pregancy and Parturition. Pullman: Current Conceptions Inc., 2005, 2003, 1999, 1997.
How does a stretch reflex occur?
The receptor in the reflex arc of a stretch reflex are 'muscle spindles' which are spindle shaped receptors distributed throughout the belly of the muscle. when the muscle gets stretched , muscle spindle is stimulated and it sends proprioceptive impulses via sensory afferent fibers in posterior root to anterior horn cells of the spinal cord. Motor impulses from anterior horn cells via motor efferent fibers in anterior root to muscle.
How is a signal able to travel in fiber optics?
The signal is encoded as light; the light changes intensity, for example a higher intensity for a one, or a lower intensity for a zero. (In practice, more complicated encoding schemes are used.)
What property of a wave is affected by the amount of energy transported?
Intensity of sound is affected. Intensity is the amount of sound energy passing in unit time. Higher intensity sounds can travel longer distances.
Is time travel hyphenated?
You can use both variations. Wiktionary lists "time-travel" as an alternative spelling to "time travel", so it seems "time travel" is the more common version.
Where does the nerve impulse travel from the reflex arc?
The nerve impulse travels through the reflex arc. It travels from the sensor through the sensory neurone, through the spinal cord and motor neurone to the effector muscle.
How does the temperature changes as you travel through earths atmosphere?
It changes to a next temperture
What is the last thing that occurs with a reflex reaction?
As you pull your hand away, nerve impulses travel to your brain. You feel pain.
Can sound waves travel through a building?
Yes, how much gets through depends on the material, thickness of walls and objects inside, and the frequency of the sound. The sound will 'attenuate' or decrease in intensity as it travels. That is because the sound changes the form of energy that it is in to heat, motion, etc. Low frequencies will travel much farther than higher frequencies.
How does the temperature changes as you travel up the atmosphere?
It gets colder as you travel up in the atmosphere.
How did railroads changes ideas about travel?
Trains made it easier to travel long distances
What measurement changes when you travel to another planet?
Your Mass!
What happens when you travel across the timezone?
the time changes......
FM signals travel as what changes?
FM signals travel as changes in the frequency of the wave.ANSWER: DEFINITELY not frequency remains the same.The duty cycle changes.It definitely IS the the frequency which changes. It changes at the same rate as the frequency of the modulation.It can be demodulated with a frequency discriminator. If the frequency remained constant and its "duty cycle" changed, the discriminator wouldn't demodulate it.
