Answer:
Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. Many enzymes change shape when substrates bind.
Explanation:
Answer:
Stem cells are typically found in that of babies, because they can become anything the body needs. Such as when a pregnant person has been hurt the baby inside will send stem cells to the injury to help repair what was damaged. Many people think that by retrieving stem cells they can be used to assist in recovery of people with regeneration of blood vessels and nerves and or even cure Alzheimer's.
Explanation:
Answer:
1. Inhibiting IP3 channels, leading to decreased Ca2 in the sarcoplasm and reduced contraction.
2. Increasing the relative activity of MLCP, leading to a decrease in tension.
3. Activating K channels, increasing K leaking out of the cell which hyperpolarizes it and decreases the likelihood of Ca2 entry.
Explanation
In smooth muscle, cyclic AMP (cAMP) mediates relaxation because cAMP inhibits a specific kinase required for myosin light chain protein (MLCP) phosphorylation, thereby triggering contraction in the smooth muscles. It has been shown that cAMP inhibits 1,4,5-trisphosphate (IP3)-dependent calcium ions (Ca 2+) release by activation of the cGMP-dependent protein kinase (PKG). PKG proteins act to modulate Ca2+ oscillations by stimulating sarcoplasmic Ca2+-ATPase membrane proteins, increasing Ca2+ in the sarcoplasmic reticulum stores and Ca2+ efflux from the cells, and activate voltage-gated potassium (K) channels, thereby leading to membrane hyperpolarization and reducing Ca2+ entry through Ca2+ channels.
Allergies are caused by environmental factors known as allergens like dust, pollen, ceramics etc.
Cystic fibrosis is an autosomal recessive genetic disorder.
Common cold is caused by viruses i.e. pathogen.
Skin cancer is caused due to genetic factors like mutations & also, due to exposure to UV radiation.
Malaria is caused by a pathogen named as Plasmodium. Female Anopheles mosquito is the carrier of plasmodium. The plasmodium completes half of its life cycle in Female Anopheles mosquito & its rest of the life cycle is completed in human body.
The types of rock that can form sediment when they are weathered is D. Igneous, sedimentary and metamorphic. (When the molten rock cools it forms an igneous rock. Metamorphic rocks can form from either sedimentary or igneous rocks. The sedimentary particles from which a sedimentary rock is formed can be derived from a metamorphic, an igneous, or another sedimentary rock. All three rock types can be melted to form a magma.)
