Spastic paralysis typically involves the upper motor neurons of the central nervous system. Damage to these neurons causes symptoms such as muscle stiffness and contraction. Conditions such as multiple sclerosis, cerebral palsy, and spinal cord injury can lead to spastic paralysis.
Spastic paralysis is a medical condition typically involving the upper motor neurons of the central nervous system. These neurons play a crucial role in controlling the activities of lower motor neurons, which are directly responsible for muscle movement. When there is damage or involvement of these upper motor neurons, it can lead to a condition known as spastic paralysis. This condition is characterized by muscle stiffness and contraction, often leading to impaired movement and coordination.
Some examples of conditions that can cause spastic paralysis include multiple sclerosis, cerebral palsy, and spinal cord injury. Treatment often involves managing symptoms and may include physical therapy, medications to reduce muscle spasticity, and sometimes surgery.
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Cell membrane (plasma membrane) acts as a selective barrier, regulating the traffic of materials into and out of the cell.
The cell membrane, also known as the plasma membrane, is a crucial component of all living cells. It serves as a selective barrier that controls the movement of substances into and out of the cell. This selective permeability is essential for maintaining the cell's internal environment and regulating the exchange of nutrients, gases, and waste products. The cell membrane consists of a lipid bilayer embedded with proteins, and its hydrophobic interior prevents the passage of most polar molecules.
To facilitate the transport of specific substances, the cell membrane contains various proteins, including transport proteins, receptor proteins, and enzymes. These proteins help regulate the flow of ions, nutrients, and signaling molecules across the membrane. Overall, the cell membrane is a vital structure that ensures the cell's survival and functionality by controlling its interactions with the external environment.
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The cell membrane acts as a selective barrier, regulating the traffic of materials into and out of the cell.
The structure that acts as a selective barrier, regulating the traffic of materials into and out of the cell is the cell membrane or plasma membrane.
The cell membrane is composed of a phospholipid bilayer with embedded proteins that control the movement of substances in and out of the cell. It selectively allows certain molecules to pass through while keeping others out, maintaining homeostasis within the cell.
For example, the cell membrane regulates the entry of nutrients and gases into the cell, as well as the removal of waste products and excess substances. It ensures that the cell maintains the appropriate balance of substances for proper functioning.
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Answer;
-Transcription;
Explanation;
-Gene expression involves the process of transcription and that of translation.
-Transcription, which takes place in the nucleus of a cell, involves the synthesis of a messenger RNA (mRNA) from a DNA template. The process is catalyzed by the enyzme RNA polymerase.
-The mRNA synthesiszed from transcription then undergoes the process of translation outside the nucleus (cytoplasm) to form proteins, that may be used for various cellular functions such as regulating cellular reactions.
The kingdom Archaebacteria is distinguished from the kingdom Eubacteria by the cell wall structure.
The kingdom Archaebacteria represent the oldest class o living thing and the most primitive also. They are known to survive under very harsh conditions hence they existed in primordial times.
The characteristic that serves to distinguish the kingdom Archaebacteria from the kingdom Eubacteria is the cell wall structure.
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Answer:
cell wall structure.
Explanation:
its correct