The primary symptoms of Parkinson's disease are muscular rigidity, slowness of movement, a resting tremor, and postural instability.
<h3>What are the causes of Parkinson’s disease?</h3>
- Parkinson's disease is a disorder of the central nervous system which results in unintended movements like uncontrolled shaking, stiffness, and difficulty to coordinate and balance.
- This is caused due to damage of nerve cells in the basal ganglia of brain which leads to decrease in levels of dopamine (a neurotransmitter).
- Nerve endings that release norepinephrine also get damaged.
- Initially the symptoms are mild which gradually worsen as the disease progresses.
- It leads to behavioral changes, fatigue, sleep disorders, depression.
- This disease can be controlled by taking medications which increase the level of dopamine and other neurotransmitters and by performing therapies which control body movements.
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<u>Answer</u>:
The enzyme activity decreases due to the denaturation of the enzymes.
<u>Explanation</u>:
Enzymes are built with proteins. Enzymes catalyze a reaction by binding to the substrate molecule in its active site. As temperature increases the rate of the enzyme activity increases because kinetic energy of the molecules get increases.
But when the temperature crosses approximately 37-40 degrees Celsius the structure of enzyme denatures due to breakage of its intra- and intermolecular bonds. The active parts of an enzyme changes and it can no longer bind to its substrate hence the enzyme activity decreases.
Answer:
Yes, it is correct, but you should also specify that B stands for black and b stands for gray, it is also important to mention the characteristic in order to have full information.
Answer:
Explanation:
i) Allosteric control
-Allosteric modulation is a mechanism whereby the activity of an enzyme is either stimulated or inhibited by a compound that binds to a site, called the allosteric site, that is dimensionaly different from the enzyme’s active site
ii) Covalent modification
-Covalent modification of enzymes, as illustrated by the addition (or removal) of phosphates, is a general mechanism for changing the activity of enzymes.
-Enzymes that transfer phosphate groups to other proteins are called protein kinases and regulate such diverse activities as hormone action, cell division, and gene expression.
Answer:
d: Tertiary neurons travel to the primary gustatory cortex.
Explanation:
The gustatory system is a sensory system that is responsible for the taste. when the food comes in contact with the taste cells present on the tongue so these taste buds carry information to the brain about flavor of the food. The chorda tympani nerve that is present at the front of the tongue, the glossopharyngeal nerve present at the back of the tongue and the vagus nerve present at the throat area and palate are the three nerve cells which carry signals to the brain stem.