Answer:
Neurotransmitters are released from axon terminals via exocytosis
Explanation:
Dendrite is the receiving part of the presynaptic neuron, while axon is the transmitting part of the neuron. So, after initiation, action potentials travel down axons to the terminals. Action potential travels through the membrane of the presynaptic cell causing the voltage-gated channels permeable to calcium ions to open. Ca2+ flow through the presynaptic membrane and increase the Ca concentration in the cell which will activate proteins attached to vesicles that contain a neurotransmitter (e.g. acetylcholine). Vesicles fuse with the membrane of the presynaptic cell, thereby release their contents into the synaptic cleft-space between the membranes of the pre- and postsynaptic cells (exocytosis of the vesicle's content). Neurotransmitter ACh (from the vesicles) binds to its receptors on the postsynaptic membrane and its binding causes depolarization of the target cell (muscle cell). Depolarization occurs because sodium enters the cell as a result of neurotransmitter receptor binding.
Inner membrane of the chloroplasts
Explanation:
The present day eukayrotes are all considered to be derived from its original ancestor – the cyanobacteria.
Earlier, photosynthesis by the first photoautotrophs took place utilizing hydrogen sulphide as the electron donor. However, it was later when the cyanobacteria, which were originally residing in the mitochondria of an eukaryotic cell under an endosymbiotic relationship, developed into true chloroplasts, the use of water as electron donor to perform photosynthesis began.
The cyanobacteria were aerobic in nature and required oxygen to survive. They evolved the chloroplasts covered with an external protective membrane and an internal membrane. It is the internal membrane which contains all the necessary organelles or components necessary for photosynthesis like thyllakoids, stroma etc which helped them to utilize water as an electron donor during photosynthesis like all the eukaryotes.
A Gamete is a sex cell, this is a cell whose genes can be pass to future generations, and is hapliod is defferent to every other cell in your body because every cell in your body has 46 chromosomes 23 from your dad and 23 from your mom, but this cell has only 23, to be able to pass it to your childrens. This are your sperm for males and eggs for females.
Answer:
Cellulose
Explanation:
Cellulose is a carbohydrate (made up of carbon and and hydrogen atoms). This is common component of cotton and wood. It is also a major component of plant cell walls Cellulose is a polymer that is composed of 3000 or more than 3000 glucose monomers linked together through β(1→4) D-linkage.
It is considered to be one of the most abundant polymers of organic nature on the earth.
- It has a number of commercial uses like:
- Manufacturing of paper and paper based products.
- In scientific labs for conducting thin layer chromatography.
- Manufacture of textile for clothings.
- Manufacturing of biofuels and pharmaceuticals.
Hope it help
Answer:
Anaphase of meiosis II
Explanation:
During Anaphase II, the spindle fibers pull the sister chromatids apart, toward the opposite poles of the cell. I recommend searching Anaphase II up and looking at a picture. It will give you a better visual understanding.
