Answer:A, B, C
Explanation:
A. The arrangement of phospholipids occurs in bilayers with the polar head groups facing both the extracellular and cytoplasmic sides, while the hydrophobic core remains in the center.
The plasma membrane also consists of membrane proteins.
B. Certain integral proteins function as transmembrane proteins that traverse the membrane and create a hydrophilic channel, specifically selective for certain solutes like enzymes, antigens, and hormones.
Peripheral proteins are located on the surface of the bilayer and act as signaling proteins.
C. Membrane lipid bilayers are not rigid or fixed. They exhibit free lateral movement of their components, thus the membrane is fluid in nature. This fluidity facilitates processes like endocytosis and exocytosis.
The blood transports carbon dioxide in the form of carbonic acid, which is formed by combining with water in the red blood cells. The dissociation reaction can be represented as:
H₂CO₃ ↔ H⁺ + CO₃⁻
As the pH of the blood decreases, the level of H⁺ ions rises, leading to a shift in the equilibrium backwards in accordance with Le Chatelier's principle. The H⁺ ions are reconverted into carbonic acid, which in effect raises the pH. When the pH exceeds certain levels, the reverse process occurs.
The term split brain refers to the condition when the corpus callosum, which connects the two hemispheres of the brain, is partially or completely severed. Studies indicate that dividing the brain in this way impacts the individual's behavior. Several differences have been found between those with an intact brain and those with a split brain. For example, people who have experienced partial brain removal often show impaired coordination between their left and right body sides. Additionally, they display restricted visual awareness and difficulties with language.
The term that correctly describes the transfer of organic molecules, inorganic ions, vitamins, and water from the digestive tract's lining into the surrounding fluid is absorption. This process is crucial in digestion because the absorbed materials are subsequently delivered to the body's cells through the circulatory system.
Euglena presenta un color verde gracias al clorofila que se encuentra en los cloroplastos de este organismo, y la estructura corporal situada en su base se llama flagelo.
Explanation:
Las Euglenas son especies que habitan en aguas dulces y saladas, y se encuentran en gran cantidad en cuerpos de agua interiores, donde pueden proliferar y teñir la superficie del agua de zanjas y estanques de un color verde.
Este color verde que producen se debe en gran parte a la clorofila que se halla en sus cloroplastos, la cual es el pigmento responsable del color verde. Este pigmento también es el causante de la coloración en este caso.
Las Euglenas cuentan con una estructura corporal especializada, ubicada en la base de su cola, que les permite moverse.
Esta estructura especializada se denomina flagelo.
