I think it is that they supply cells with nitrogen.
The cervical
vertebrae serve as a link between the thoracic spine-rib cage and the
head. Each thoracic
vertebrae has one pair of ribs that attaches to it laterally. <span>The vertebral column is composed of
24 articulating vertebrae. </span>The greatest amount of rotation between any two vertebrae
occurs between C1 and C2.
Answer:
presence of ribosomes because they are the main sites of production of proteins
Answer:
The correct answer will be- ATP binds to the myosin head
Explanation:
The muscle contraction is associated with the ATP binding to the myosin head which triggers the formation of the cross-bridge between the myosin head to the actin on muscle and pulling the sarcomere.
The cross-bridge cycle pulls the sarcomere thin filaments which require energy provided by the ATP as ATP when binds the mysoin head allows the detachment of the myosin to the actin.
Thus, ATP binds to the myosin head is the correct answer.
Answer:
hypertonic to water and hypotonic to salt solution.
Explanation:
<em>When two solutions of unequal solute concentrations are separated by a permeable membrane, water molecules move from the solution with lower solute concentration to the solution with higher solute concentration until an equilibrium is reached. The solution with higher solute concentration is referred to as being hypertonic while the other one is referred to as being hypotonic.</em>
The cells of celery stalks have higher solute concentration in their cell saps compared to the surrounding fresh water. Hence, water keeps entering the cells, resulting in turgidity. The cells are therefore hypertonic to fresh water.
The salt solution however seemed to have more solute concentration compared to that of the cell sap of the celery stalks. This made the cells of the celery stalks to lose water to the surrounding solution, resulting in flaccidity. Hence, the cells are hypotonic to salt solution.