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Montano1993 [528]
4 years ago
15

What is the difference between a loess and a dune?

Biology
1 answer:
zalisa [80]4 years ago
8 0
<span>A loess is an aeolian sediment formed by the accumulation of wind-blown silt, typically in the 20–50 micrometer size range, twenty percent or less clay and the balance equal parts sand and silt that are loosely cemented by calcium carbonate.
</span><span>A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle. Dunes grow as grains of sand accumulate.</span>
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What differentiates an autonomic reflex from a somatic reflex? a single sensory neuron in the sensory pathway
nordsb [41]

A somatic reflex is that  somatic reflex has a only one motor neuron that is present in it reflex arc.

<h3>What is reflex?</h3>

The term reflex is in common use in anatomy, physiology, biology and psychology. Reflex has to do with an action that a person could perform unconsciously. The reflex that is performed by an individual could be autonomic reflex or a somatic reflex.

For the  autonomic reflex, there are two neurons that are found to make up the motor components that are present in the reflex arc while the somatic reflex has only one motor neuron that is present in it reflex arc.

As such, we can conclude finally that what differentiates an autonomic reflex from a somatic reflex is that  somatic reflex has a only one motor neuron that is present in it reflex arc.

Learn more about reflex:brainly.com/question/6023003

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6 0
2 years ago
Match the following items. 1. insertion inner, light-sensitive layer of the eye 2. sympathetic system point where a muscle is at
Sergeu [11.5K]

Answer:

1. Inner, light-sensitive layer of the eye. Retina

2. Point where a muscle is attached to the more movable part. Insertion

3. Outer, fibrous layer of the eye. Sclera  

4. Translates sound vibrations into nervous impulse. Cochlea

5. Prepares the body for activity. Sympathetic system

6. Sense of balance. Semicircular canals

7. Coordinates our muscular movements. Cerebellum

8. Point where the muscle is attached to the less movable bone. Origin

9. Active when the body is resting. Parasympathetic system

10. In the brain stem, controls the activity of internal organs. Medulla oblongata

Explanation:

  • The retina is the internal layer of the eye. It receives the light from the exterior and transforms these stimuli into nervous stimuli, which travels to the brain to give an image.
  • The sclera is the outer layer of the eye. It protects the eye and keeps the eye's shape.
  • A muscle has an origin and an insertion. The first one is the part attached to the less movable bone and the second one to the more movable part. These two parts can be in different bones. When the muscle contracts, the bone attached to the insertion moves towards the origin of the muscle.
  • The cochlea and the semicircular canals are in the inner ear. The cochlea is the organ responsible for transforming the sound's vibrations into nerve impulses that will travel to the brain so that we can hear. In its interior, there are cells that have hairs, which move with the vibrations and transmit this message to the nervous system.

The semicircular canals are three and with liquid that moves as we move. The movement of this liquid moves hair cells that are in the canals. These hair cells inform our brain about our location in space and give us a sense of valance.

  • The cerebellum is part of the central nervous system. It involves the coordination of movements, learning new movements, and controlling them.
  • The sympathetic and parasympathetic nervous systems are part of the autonomic nervous system. The first one prepares our body for an emergency or an activity. It is the one that increases our respiratory frequency, our heart rate, dilates our pupils, makes us more alert, amongst other things. On the other hand, the parasympathetic system relaxes our body, slowing our heart rate, is involved in the digestion and the relaxation of our muscles. It activates, for example, after we eat.
  • The medulla oblongata is part of the brainstem. It controls involuntary actions such as heart rate, respiration, and vasoconstriction. As it controls these functions, it affects internal organs like the heart, lungs, arteries, etc.

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3 years ago
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