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The all or none principle states that?
The all-or-none principle in physiology states that once a nerve impulse reaches a certain threshold, a neuron will fire at its maximum potential. If the stimulus is strong enough to trigger an action potential, the response will occur at full strength. If the stimulus is below the threshold, no response will be triggered.
What are the growth regions of roots?
The Meristematic Region or Growing PointThis region occurs immediately behind the root cap. The Meristematic region consists of meristematic tissue and is protected by the root cap. The cells are very activeand divide rapidly to form new cells which differentiate later to form more specialized root tissues. The cells of this region also replace the cells rubbed-off from the root cap and provide additional cells for the next region.FunctionThis is the region where the cells divide and where additional cells are provided for the zone of elongation.The Region of ElongationThe cells formed in the meristematic region undergo rapid growth in length. This causes the root to elongate and penetrate deeper into the soil in search for water and mineral salts. The meristematic and elongation zones are also referred to as the region of growth.FunctionIn this region the cells undergo rapid enlargement,i.e. the cells undergo rapid growth in length.The Root-hair RegionThe root hair region occurs a short distance above the region of elongation. Here a large number of fine, hair-like outgrowths are formed. The root hairs arise from the epidermal tissue of the root and are called root hairs. The root hairs are short and short-lived and develop on theprimary and secondary roots. A root-hair consists of the following parts: a thin cell wall, a thin lining of cytoplasm which contains thenucleus and a comparatively large vacuole containing cell sap.FunctionThe main function of the root hairs is to increase the area of absorption of the root.The Mature RegionThe mature region is situated above the root hair region. Here the root becomes thicker and secondary or lateral rootsare developed. The secondary roots in turn rebranch to form tertiary roots. Each lateral branch has its own cap, root hairs, meristematic, elongation and mature regions. The roots in this region are covered by a protective cork layer .FunctionsIn this region the cells undergo differentiation into specialized cells,(e.g. xylem and phloem).It also serves to anchor the plant.febbie
What is the difference between positive and negitve geotropism?
Geotropism (also called gravitropism) is the turning or growth movement by a plant or fungus in response to gravity. Roots show positive geotropism (grow toward gravity - down) and stems show negative geotropism (grow away from gravity - up).
Which of the following indicates a plant's response to gravity?
Geotropism is the plant's response to gravity. Plants exhibit positive geotropism when they grow towards the gravitational pull (roots), and negative geotropism when they grow away from it (shoots).
Can you make a sentence using the word Geotropism?
geotropism mean to have fun doind the things
Does geotropism determine the direction of growth?
Yes, geotropism DOES determine the direction of growth. Negative geotropism is when a section of the plant grows upwards. For example, stems grow upward. Positive geotropism is when a section of the plant grows downwards. In this case, a plant's roots would be the perfect example.
Is gravity a response to geotropism?
No
What is Geo-Tropism?
Geotropism is a plant growth or movement in response to gravity. Upward growth of the plant's parts against gravity is called negative geotropism, whilst downward growth of roots is called positive geotropism.
Gravitropism is also known as what?
geotropism
What is another name for geotropism?
Another name for geotropism is gravitropism. It refers to the growth or movement of an organism in response to gravity.
What terms can be defined as a root's downward growth as a response to gravity?
Geotropism or gravitropism are terms that describe a plant's root growth in response to gravity. Positive geotropism refers to roots growing downwards towards Earth, while negative geotropism refers to roots growing away from gravity, such as when they grow upward in a climbing plant.
What is a geotropism?
Gravitropism is a response to gravity. And the plant roots will follow the gravity also you cannot change the place where the roots will grow also if you will put it on the opposite side of the gravity it will also grow down.
What is positive gvravitropism?
firstly there is no word as GVRAVITROPISM. When plants grow towards gravity it is called GEOTROPISM. its is mainly the root of plants that show geotropism; because they grow downward. but the stem show negative geotropism because it grows up in the opposite direction of gravity
How does geotropism help a plant survive?
geotropism is the ability of the plant to grow in he direction of gravity so if there isn't sufficient water available the roots of the plant due to geotropism go deeperinto the the earth so as to obtain some amount of water which will help them to survive
