Answer:
Structure and function of eukaryotic cell
Eukaryotes have following promint components of cell
1. True nucleus:
The nucleus is surrounded by a true membrane called nucleoplasm. Nucleus contain hereditary materials, DNA which control inheritance. It also contain RNA synthesize in nucleolus.
2. Cell wall:
It is present only in plant cell, and contain cellulose, hemicellulose, lignin, suberin etc. It provides mechanical support to plants.
3. Cell membrane:
It is present both in plants and animal cells. It is made from protein, lipids and carbohydrates. It acts as selective permeable membrane and control the movement of molecules in and out of the cell.
4. Mitochondria and chloroplast:
Chloroplast is present only in plant cell. It contains chlorophyll which aid in photosynthesis and prepare glucose.
Mitochondria is present in all eukaryotic cells.cellular respiration occurs in mitochondria and ATP is formed by the break down of glucose.
5. Endoplasmic reticulum and Golgi apparatus:
Endomembrane system of eukaryotic cell is made from a network of tube and sacks connected together forming endoplasmic reticulum and golgi apparatus independently. Endoplasmic reticulum may have attached ribosomes or not and is involved in protein synthesis, while golgi apparatus help in modification, packaging, and transport of proteins through out the cell.
Lysosomes, cytoskeleton, vacoules, peroxisomes, glyoxisomes and other organelles are also present in eukaryotic cell.
Option D has the highest concentration of lactic acid in the student's muscle tissue.
We can arrive at this answer because:
- Lactic acid increases its concentrations in the muscle due to a high physical effort in anaerobic conditions.
- This promotes a lack of oxygenation in the muscle, which through contractions, causes the cell to partially catabolize glucose molecules.
- The result of this is the creation of two pyruvic acid molecules, which will react with NADH2 molecules, creating lactic acid, which will build up in the muscle as the exercise continues.
As we can see in the information presented above, option D shows the performance of flexions with more intensity and for a longer period, which justifies a greater accumulation of lactic acid in the muscle.
It is important to remember that the accumulation of lactic acid in the muscle is a negative situation and that it can cause muscle pain and fatigue.
More information on lactic fermentation at the link:
brainly.com/question/13769502
Answer:
Epithelial tissue is the type of a tissue which covers the surface of the body.
Explanation:
Epithelial tissue also known as epithelium refers to the sheet of cells which covers the exterior surfaces of the body,linings of the internal cavities, passageways and forms certain glands.
The no.of cell layers and cell types give rise to 6 different types of epithelial tissues:
- Simple Squamous Epithelia
- Simple Cuboidal Epithelia
- Simple Columnar Epithelia
- Stratified Squamous Epithelia
- Statified Cuboidal Epithelia
- Stratified columnar Epithelia
Four functions of the epithelial tissues are:
- Protection of the underlying tissue
- Absorption
- Secretion
- Reception of sensory stimuli
I think it’s propanol, i’m not too sure
Repeat the same experiment and obtain the same results.
