Answer:
The correct answer is c) The first statement is true; the second is false.
Explanation:
To be able to perform its role, a hormone must bind a specific receptor in its target cell. The receptor can be located inside the cell (in cytosol) or in the surface of the cell (transmembrane receptor). By regulating the expression of the receptor, the target cell regulates the hormonal activity.
The number of hormone receptors in a cell is not constant, it can vary depending on sereral factors, such as the age of the organisms, the effect of several drugs, mutations or diseases.
Amino acids. These class of compounds
are considered the building blocks of most organisms, and around 500 of these
are known and indentified. All proteins, carbohydrates, and nucleic acids are
polymers ("many units") and each unit is an amino acid.
Answer:
The most appropriate tissue to join the pubic symphysis -that provides resistance to pressure and stretch during childbirth- is fibrocartilage.
Explanation:
Options for this question are:
- <em>A. Fibrocartilage.</em>
- <em>B. Elastic cartlage.</em>
- <em>C. Bone.</em>
- <em>D. Hyaline cartilage.</em>
Fibrocartilage is made up of dense connective tissue rich in type I collagen fibers, hyaluronic acid and proteoglycans, which give it resistance to stretching and pressure.
Some ligaments are formed by fibrocartilage, in addition to the intervertebral discs and the junction of the pubic symphysis, allowing a certain degree of mobility to the associated structures due to their semi-elastic properties.
Hyaline cartilage, also made up of connective tissue, is less resistant than fibrocartilage.
Bone cannot form this junction, because it would not allow the relative mobility of the joint.
The elastic cartilage allows for stretching but not the strength needed to join the pubic symphysis.
Learn more:
Fibrocartilage brainly.com/question/5581914
