The tetanus is a disease caused by the bacterium Clostridium tetani. The Clostridium tetani is a normal inhabitant of the soil and can easily contaminate dirty wounds, especially those due to farm practices. In the body, these bacteria produce a toxin called tetanospasmin. The toxin enters the central nervous system which is the brain and spinal cord where it blocks the mechanisms that inhibit motor neurons from firing when a muscle is relaxed. With this inhibition removed, the neurons fire repeatedly and continually stimulates the muscle, causing painful and increasingly stronger muscle spasms. The masseter or jaw muscles are often the first muscles involved, and it is the spasm of these muscles that gives rise to tetanus' common name lockjaw, also called trismus. The muscles of the face, neck, back, and proximal limbs are also commonly affected. The contraction of the facial musculature leads to a characteristic facial expression with a teeth-baring grin and raised eyebrows. Contraction of the back muscles may cause the back to arch posteriorly.
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Hello. This question is incomplete. The full question is:
"Drag the terms on the left to the appropriate blanks on the right to complete the sentence. Terms may be used more than once.
1- free water
2- Solute
During osmosis, water diffuses across a selectively permeable membrane from the region of higher _______ concentration and lower _____ concentration to the side with lower _______ concentration and higher _______ concentration
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Answer:
During osmosis, water diffuses across a selectively permeable membrane from the region of higher free water concentration and lower solute concentration to the side with lower free water concentration and higher solute concentration
Explanation:
Osmosis is a biological process that takes place in cells and allows a substance to pass through the plasma membrane. Through osmosis, the plasma membrane, water can pass into and out of the cell through a gradient of solute concentration, that is, water passes from the place with the lowest concentration of solute to the place with the highest concentration, allowing thus the balance between the inter and extra cellular medium.
