The ribht answer is a.
* Muscle contraction results from the coordinated contraction of each of the muscle cells.
There are four phases during the contraction of a "typical" muscle cell:
- the excitation or the stimulation which corresponds to the arrival of the nervous message on the muscular fiber;
- the excitation-contraction coupling which groups together all the processes making it possible to transform the nerve signal received by the cell into an intracellular signal towards the contractile fibers;
- the contraction itself;
- the relaxation which is the return of the muscular cell to the state of physiological rest.
* There are two types of muscle contraction:
isometric contraction when the length of the muscle does not change when contracting (supports a load);
anisometric contraction (or isotonic) when there is a change in the length of the muscle, with a rapprochement of the points of insertion of the muscles it is concentric and eccentric when these move away;
Human growth hormone (GH) is a substance that controls your body's growth. GH is made by the pituitary gland, located at the base of the brain. GH helps children grow taller (also called linear growth), increases muscle mass, and decreases body fat.
Answer:
Change occur in form and structure of the cell.
Explanation:
The structure and shape of the cell change because the function of leg is different from the lungs. In the lungs the epithelial lung cell is responsible for the detection and protection of the cells against pathogen while on the other hand, the leg has the function to move an individual from one place to another so due to difference in function, the cells of both regions have different shape and structure of the cell and the epithelial lung cell will be changed into a leg muscle cell.
B) Endocrine disruptors mimic hormones that regulate critical biological processes
Answer:
The box will not move because balanced forces are acting on it.
Explanation:
According to Newton's first law of motion, an object will remain in its state of rest or motion along a straight line unless acted upon by an unbalanced force.
An unbalanced force is an individual force acting on any side of an object which is not balanced by a force of equal magnitude acting in the opposite direction.
From the image, two forces of equal magnitude of 10 N are pulling the 100 kg box in opposite directions. Since the two forces, 10 N each are pulling the object in opposite directions, they are balanced forces. Therefore, the box will not move because balanced forces are acting on it.
