Answer and Explanation:
The dendrite connects the axon of one neuron with the dendrite of another neuron to relay messages. Neurons transmit information to each other throught synaptic gaps. The cells release chemicals known as neurotransmitters to communicate with one another.
A synapse functions to allow transmission of nerve impulse from neurone to neurone. Acetylcholine is a substance that is used in impulse transmission. When an impulse reaches the synaptic knob, it stimulates the vesicles to move towards the pre-synaptic membrane releasing acetylcholine. The transmitter substance makes the membrane permeable.
The two main sources that lead to increased genetic variation are gamete mutations and recombination.
A gamete is the cell which combines with another cell during fertilization. So, its mutation can lead to variation in genes. Recombination as well, as the position of genes is changed.
Answer:
due to the presence of chlorophyll
Explanation:
Chlorophyll gives plants their green color because it does not absorb the green wavelengths of white light. That particular light wavelength is reflected from the plant, so it appears green.
Answer:
This question lacks options, the options are:
a. Presynaptic; Ca2+ ions
b. Postsynaptic; Ca2+ ions.
c. postsynaptic; neurotransmitters
d. presynaptic; neurotransmitters
e. dendritic; neurotransmitters
The correct answer is d. Tetrahydrocannabinol, the active ingredient in marijuana, binds to receptors located in the <u>presynaptic</u> terminals of certain brain neurons. It lowers the likelihood that these neurons will release <u>neurotransmitters</u>
.
Explanation:
Tetrahydrocannabinol is the most abundant cannabinoid in most cannabis varieties and has the most potent psychoactive effect. Conventional neurotransmitters are water-soluble substances stored in small vesicles at the thin ends of the axon (presynaptic terminals). When a neuron generates an impulse by sending an electrical signal along the axon to the presynaptic terminals, the neurotransmitters are released from the vesicles, diffuse through a narrow intercellular space (synaptic cleft) and interact with the receptors on the surface of the recipient neuron (postsynaptic neuron). Cannabinoids cause a decrease in the release of neurotransmitters from the presynaptic terminal through the inhibition of Ca++ channels. This signaling is mediated by the βγ subunit of the G protein. The βγ subunit of the G protein inhibits the Ca channels of type N and P / Q, which are the majority in presynaptic neurons.
Answer:
<em>O</em><em>C</em><em> </em><em>is</em><em> </em><em>the</em><em> </em><em>correct</em><em> </em><em>answer</em><em> </em>
