alluvial fans
Explanation:
An alluvial fan is an example of a land feature formed by river erosion.
River erosion is the activity of water removing weathered materials from loose rock surfaces.
- An alluvial fan usually forms in an area where a stream flows outward from a hill or mountain down to the valley floor,
- It is usually fan shaped with finger-like projections outwards.
- Close the hill, we have coarse particles like boulders.
- The sequence fans outward as the river loses its erosisive power.
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Answer:
The correct answer is: Homeostasis.
Explanation:
Homeostasis is a key element in the correct functioning of the body, as it groups different processes that consist of regulating biological systems in order to maintain certain aspects of the body constant. If homeostasis were to fail, the body would sicken.
Homeostasis is controlled by two important systems: the nervous system, and the endocrine system. While they have many differences (for example, the nervous system's response is quicker and lasts less than the endocrine system's response), they share the capacity of sending messages to different parts of the body to generate responses that help us adapt to the varying conditions of the environment.
Examples of homeostasis include the regulation of body temperature, pH, and blood sugar levels (glycemia).
Answer:
the formation of new and distinct species in the course of evolution.
Neurons in the <u>spinal cord</u>, control motor reflexes, which allows rhythmic and automatic movements to be carried out.
The spinal cord represents the lowest level in the hierarchical system that regulates reflex motor activity, voluntary movements, and body posture.
Therefore, their neurons have been organized into circuits that participate in simple automatic gait movements and simple defensive movements (withdrawal of the muscle in the event of any aggression) through reflex responses.
The motor neurons of these circuits are located in the anterior horns where they are arranged forming the so-called "poles" of motor neurons, equivalent to true motor neuron nuclei.
- Alpha motor neurons their axons are myelinated and they group together in the medulla and form columns that are known as motor nuclei.
- Gamma (γ) motor neurons innervate muscle fibers of the muscle spindle.
- Interneurons can be excitatory or inhibitory.
Therefore, we can conclude that neurons in the spinal cord, control motor reflexes, they present functional interactions between them and this allows rhythmic and automatic movements to be carried out with ease through reflex responses.
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