Answer:
The physical space between the presynaptic and postsynaptic neurons is called the synaptic cleft
and the chemical that is released to signal across this space is called a neurotransmitter
Explanation:
A synapse is the junction between dendrites of two adjacent neurons. Its function is to allow the transmission of nerve impulses from neurone to neurone. Tn the presynaptic knob there are vesicles which contain a transmitter substance which is usually acetylcholine. The acetylcholine diffuses from the presynaptic membrane to the postsynaptic membrane.
Answer:
D.
Explanation:
Natural selection is the way that organisms adapt through adaptations to better survive and pass on the special genes which enable the offspring to survive. Saying an organism will always mutate to survive is wrong, as natural selection implies that not all organisms survive. With natural selection, nothing is "selected", so B and C are not correct. However, mutations DO make organisms "more fit" to survive their environments, so D is the answer.
Pepsin is an Enzyme that is found in the stomach to break down protein.The Pepsin breaks the protein down into smaller peptides at low pH vale.
There is also one within the small intestine called Chymotrypsin and also the Carboxypeptidase.
Hope this helps and if you are still unsure read up on these to help you.
Geological activities that can be occur in the eraty crust.
in divergent oceanic - the two plates oceanic and oceanic diverge or move towards each other and the resulting activities such as mid ocean ridges.
in divergent continental - the two continental plates move toward each other and the resulting activities such as valleys in land due to diverging of land.
