Answer:
Generally, the unsaturations of the fatty acids are of the cis type. This causes the arrangement of the molecule to be angled, with the apex at unsaturation. This angulation causes the melting points of unsaturated acids to be lower than those of their saturated counterparts and therefore are liquid at room temperature. Double bonds in trans distort little crystalline symmetry, which is very similar to that of saturated fatty acids.
Explanation:
They are long chain carboxylic acids, usually have no carbon pair (14 to 22), the most abundant have 16 and 18 carbons.
Fatty acids are saturated when they do not have double bonds, they are flexible and solid at room temperature.
Unsaturated or polyunsaturated if there are double or triple bonds in the chain, rigid at the level of the double bond being oily liquids.
Physical properties
- Solubility. They are bipolar or amphipathic molecules (from the Greek amphi, double). The head of the molecule is polar or ionic and therefore hydrophilic (-COOH). The chain is apolar or hydrophobic (-CH2- and -CH3 terminal groups).
- Melting point. In saturates, the melting point increases due to the number of carbons, showing a tendency to establish Van der Waals links between the carbonated chains. Unsaturates have fewer interactions of this type due to the elbow of their chain.
Answer:
1. Sarcolemma
2. T-Tubule
3. Sarcoplasmic reticulum
4. Terminal Cisternae
5. Myofibrils
6. Myofilament
7.Thick filament
8. Thin filament
Explanation:
These are all parts of the skeletal muscle and they are all involved in the contraction of your muslces.
The sacrolemma is also known as the myolemma. It is a specialized plasma membrane of the skeletal muscle cell. It is an excitable membrane that shares similarities to the cell membrane of a neuron cell.
The T-tubule extends from the sarcolemma to the sarcoplasmic reticulum (SR). This is the smooth endoplasmic reticulum of the muscle cell. When the sarcolemma gets excited, it triggers the SR to release the calcium ions stored in it. The release of Calcium ions triggers the contraction of myofilaments.
There are two types of myofilaments, the thick myofilament and the thin myofilament. These myofilaments contain contractile proteins, actin and myosin. Thick myofilaments contain myosin where one thick myofilament contains 300 myosin molecules. Thin myofilaments contain contractile and regulatory proteins. These myofilamens make up myofibrils.
S waves can only move along the surface of the planet like ripples on water.
The second answer, it is durable because it is tested, is the correct answer choice. This is because science cannot be based on opinion or personal philosophy, and science is constantly chaging and being updated as we learn more about our world and the things around it.
