Answer: Large molecules and wastes move through the membrane through forms of active transport- endocytosis and exocytosis.
Explanation:
Molecules are moved across the cell membrane via different mechanisms like diffusion, facilitated diffusion and passive transport; however, some very large molecules require specialized types of active transport to cross over- these are endocytosis and exocytosis.
During endocytosis large molecules cells and cell fragments moved across the plasma membrane through a process of <em>invagination;</em> piece of the external cell membrane falls into itself and forms a small pocket that surrounds the target molecule this breaks off from the membrane to form an intracellular vesicle. Different methods of endocytosis such as <em>phagocytosis, pinocytosis </em>and receptor-mediated <em>endocytosis</em>, take in cells, water and targeted substances respectively.
Like endocytosis, the particles (signal proteins, neurotransmitters and waste material) are surrounded by a phospholipid membrane. However, in exocytosis, this membrane is formed in the cytoplasm, and merges with the plasma membrane’s interior in a process <em>opposite to </em>endocytosis; material is removed from the cell and exported into the cell’s exterior called the extracellular space.
The first option for 1 and the second option for 2
Answer: C. Microfilaments
Explanation: Microfilaments, also called actin filaments, are protein filaments in the cytoplasm of eukaryotic cells that form part of the cytoskeleton. They are primarily composed of polymers of actin, but are modified by and interact with numerous other proteins in the cell. Microfilaments, or actin filaments, are the thinnest filaments of the cytoskeleton and are found in the cytoplasm of eukaryotic cells. The polymers of these linear filaments are flexible but still strong, resisting crushing and buckling while providing support to the cell.
Answer:
Which two sense organs enable someone to run up a slope. Please state the explanation of each.
Sense organs that enables someone to run up a slope include eyes and nose
Explanation:
Eyes enables one to see where to run while nose ensure breathing is intact when making the run
Answer:
NeanderthalsThese artistic innovators were probably Neanderthals. Dated to 65,000 years ago, the cave paintings and shell beads are the first works of art dated to the time of Neanderthals, and they include the oldest cave art ever found
Explanation:
Which hominids created art? The first human artist on Earth is believed to have drew on a cave wall with red ochre over 65,000 years ago, as a Neanderthal reached out and drew on it. There is no evidence that the modern human is the only species to express itself through art, as is widely believed.