Answer:
True
Explanation:
Muscle contraction. It refers to the physiological process during which the muscle, by sliding of the structures that compose it; It shortens or relaxes. Its functioning is closely related to the structure of the muscle fiber and the transmission of the electrical potential through the nerve pathways. The model that describes muscle contraction is known as a filament slip mechanism.
Small projections that originate on the sides of myosin filaments are called cross bridges, the interaction between these cross bridges and actin filaments causes contraction.
When there is an increase in the total mass of a muscle it is called muscular hypertrophy. When it decreases The process is called muscular atrophy.
When the frequency reaches a critical level, the successive contractions finally become so rapid that they merge with each other and the contraction of the entire muscle appears to be completely smooth and continuous so <u>weaker contractions</u>.
Answer:The third phase of mitosis, following metaphase and preceding telophase, is anaphase. Since the sister chromatids began attaching to centrosomes on opposite ends of the cell in metaphase, they're prepped and ready to start separating and forming genetically-identical daughter chromosomes during anaphase.
Explanation:
Answer:
Hemoglobin
Explanation:
Hemoglobin is the protein present in the red blood cells of the blood. The protein hemoglobin serves as oxygen carrier and binds to the oxygen in lungs. As blood flows from lungs to the different body parts, hemoglobin serves to carry oxygen from lungs to various cells of the body. At higher partial pressure of carbon dioxide and lower pH of cells of the body, the hemoglobin releases oxygen and thereby, serves as oxygen carrier.
Answer:
Sympathetic division
Explanation:
Adrenal medulla is located at the center of adrenal gland, surrounded by adrenal cortex. It consists of cells that secrete adrenaline and noradrenaline and also a small amount of dopamine when stimulated by sympathetic preganglionic neurons. Preganglionic autonomic fibers lead to them directly from central nervous system therefore adrenal medulla affects heart rate, available energy, and metabolism.