Answer:
Among the following statements shown, the most accurate concerning the founder effect is that (b) It results when a small population breakers away from a larger one. Founder Effect is defined as the reduced genetic diversity which is most likely caused when a population is descended from a small number of colonizing ancestors.
The primary symptoms of Parkinson's disease are muscular rigidity, slowness of movement, a resting tremor, and postural instability.
<h3>What are the causes of Parkinson’s disease?</h3>
- Parkinson's disease is a disorder of the central nervous system which results in unintended movements like uncontrolled shaking, stiffness, and difficulty to coordinate and balance.
- This is caused due to damage of nerve cells in the basal ganglia of brain which leads to decrease in levels of dopamine (a neurotransmitter).
- Nerve endings that release norepinephrine also get damaged.
- Initially the symptoms are mild which gradually worsen as the disease progresses.
- It leads to behavioral changes, fatigue, sleep disorders, depression.
- This disease can be controlled by taking medications which increase the level of dopamine and other neurotransmitters and by performing therapies which control body movements.
Learn more about Parkinson’s disease here:
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Hello,
Question- In a particular species brown fur is dominated over white fur. So how could an individual in the specias have tan fur?
Answer- well there are many possibilities of why that specias has TAN fur it can start from there parents had brown fur till they was standing in the sun for to long or even that there habbitat is different temp.
Important- If my answer helped you please mark me as brainliest thank you and have the best day ever!
The synapse between neuron X and the postsynaptic neuron is most likely a cholinergic synapse. Neurotransmitters from neuron X bind to the postsynaptic membrane receptors that are connected to sodium channels. Positive sodium ions(Na+)enter the cell but are not enough to make the membrane potential reach the threshold. This is an excitatory synapse.
The synapse between neuron Y and the postsynaptic neuron is an inhibitory synapse. The most common inhibitory neurotransmitter is GABA(Gamma amino butryric acid). When GABA binds to the postsynaptic receptor, chlorine channels are open. Chlorine(Cl-) is an anion that is negatively charged. When chlorine enters the cell it makes the potential go below the resting membrane potential.
The synapse between neuron Z and the postsynaptic neuron has pretty much the same mechanism as the synapse between neuron X and the postsynaptic neuron but more sodium ions enter the cell so an action potential can be generated.