A sacromere is a segment between two adjacent Z discs and are essential for the striated structure of the cardiac and skeletal muscles.
<u>Explanation:</u>
The Z disc is surrounded by the I band made of thin filament called actin. The I band is followed by the A band made up of thick filament called myosin. When the muscles contract the actin and the myosin become superimposed/overlapped.
The sliding filament model explains the contraction of the sacromere in which the Z discs move closer due to the overlapping of the thin and thick filaments. Thus the I band moves close to the A band which remain the same length as shown in figure.
Answer:
En los seres vivos acuáticos el oxigeno es tomado del <u><em>agua</em></u> y penetra a la célula por el fenómeno de <em><u>respiración branquial.</u></em>
Explanation:
La respiración es el proceso mediante el cual los seres vivos obtienen oxígeno. Es decir, la respiración implica el reemplazo del dióxido de carbono en los pulmones por oxígeno del aire, y puede ser pulmonar, branquial, traqueal o cutánea.
La respiración branquial es un tipo de respiración propia de la mayoría de los animales acuáticos y se lleva a cabo en las branquias, unas estructuras con forma de láminas que contienen vasos sanguíneos. Los animales acuáticos dispone de estos órganos que permiten absorber el oxígeno que se encuentra en el agua y eliminar el dióxido de carbono.
El agua que entra por la boca y circula por las branquias, donde el oxígeno es absorbido, pasa a la sangre y es transportado a todo el cuerpo donde se produce una respiración celular.
Es decir, <em><u>en los seres vivos acuáticos el oxigeno es tomado del agua y penetra a la célula por el fenómeno de respiración branquial.</u></em>
Muscle tension is determined by lots of factors including: (1) muscle force, depending on the amount of force that we exert into our muscles, the muscle tension also varies. (2) angle of pull. This is also a relevant aspect in determining the muscle contraction.
Answer:
1. Glycolysis: breaks down glucose into pyruvic acid and ATP
2. Electron transport chain: picks up hydrogens and produces ATP
3.Krebs cycle: produces carbon dioxide, water, and ATP
Explanation:
1. Glycolysis: It is a common process for both arerobic and anaerobic respiration in whcih one molecule of glucose (6-carbon) is converted into two molecules of pyruvic acid (3-Carbon). Net gain of 2 ATP during glycolysis and it occurs in cytoplasm of the cell.
2. Electron transport chain: It is the terminal step of aerobic respiration. It occurs on the inner membrane of the mitochondria where reduced coenzymes NADH and FADH₂ are oxidized and oxygen is final electron acceptor. ATPs are released.
3. Krebs cycle: Enzymatic reaction whcih occurs in the mitochondiarl matrix. In Krebs cycle, carbon dioxide, water, reduced coenzymes NADH and FADH₂and ATP are produced.
46 chromosomes. 23 pairs. 23 chromosomes come from the egg (from the mother) and 23 come from the sperm (from the father). Haploid (containing one set of chromosomes) sperm and egg fuse to form a diploid (containing two sets of chromosomes, one from each parent) zygote.
