Diffusion is a spontaneous process in which molecules move with their concentration gradient. For example, if you place food coloring in water, the food coloring will slowly diffuse through the water until the entire solution has been balanced.
Osmosis is specifically the movement of <em>water</em> through a semipermeable membrane - meaning a membrane that can let some substances in but keep others out - and, similar to diffusion, it moves with its concentration gradient. For example, if you place a glucose solution sealed in plastic in water, water will move into the plastic to even out the concentration of glucose in the entire solution because glucose is too large to diffuse freely.
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<h2>Axons </h2>
Explanation:
Axons cross from one side of the spinal cord to the other through the gray commisure
- Each arm or extension of the gray matter in the spinal cord is referred to as a horn
- Projecting towards the back of the spinal cord are the dorsal horns (or posterior horns)
- Projecting towards the front are the ventral horns (or anterior horns)
- In the thoracic and upper lumbar regions of the cord, an additional pair of side projections occur, which are called the lateral horns
- A narrow band of gray matter known as the gray commissure stretches across of the center of the spinal cord and connects the two sets of horns
- In the middle of the gray commissure is the central canal, which contains cerebral spinal fluid
Answer:
The term evolution was first used by <u>Charles</u><u> </u><u>Darwin</u>
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The egg cell of a plant is located in the <em>Ovary</em>.
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Answer:
In a fibrous joint the bones which are adjacent to each other are connected by fibrous connective tissues, mainly collagen, with out forming any cavity of joint.
Explanation:
- The fibrous joints and not movable and cover important structures like brain being covered by skull bones which are articulated by fibrous joints namely sutures.
- Long bones too are stabilized by this type fibrous joints as is formed between radius and ulnar bone of forearm.
- Another important fibrous joint is in between the root of the teeth and gum sockets in maxillary region. Here fibrous joint binds the teeth firmly so that continuous motion and pressure during eating may not loosen it.