Correct Completed Questions; Susan, a 67 year old female is experiencing ataxia, or poor muscle coordination. Doctors perform a neurological exam and they find that Susan is not positive for the Romberg test. Describe what these findings suggest about the sources of Susan's ataxia.
Answer:s
In order to test for balance and positioning(proprioception) as a measure of neurological function, or to test level of intoxication alcohol during driving, Romberg test is usually conducted,which can be negative or positive.It is generally used to investigate the cause of loss of motor control in individuals.
Explanation:
A positive result showed that her ataxia was due to loss of positioning due to loss of sensory from sensory neurons.However if negative as in the case of Susan, then it is to due to abnormality/dysfunctions in the cerebellum, and not due to loss of sensory functions,
If a woman takes HIV medicines during pregnancy and childbirth and her baby receives HIV medicines for 4 to 6 weeks after birth, the risk of transmitting HIV can be lowered to 2% or less. Most HIV medicines are safe to use during pregnancy, and don't increase the risk of birth defects.
In general, the infected mother should simply stay healthy and intake HIV medicines while she is pregnant.
Answer:
c) degree of myelination of the axon
Explanation:
Axon conduction velocity can be defined as the speed at which an electrochemical impulse propagates down an axon.
Factors that determines the rate of conduction velocity are:
- axon diameter-larger diameter axons have a higher conduction velocity
- sheeth-a myelin sheath increases the rate of impulse propagatio
Different types of neurons will have different speed of propagation because of their different properties and because different types of information are sent.
1. two copies of the duplicated chromosome are attached at their centromeres before separating
2. chromosomes replicate before cell division
3. chromosome separation begins at the origin of replication on DNA
4. Before separation duplicated chromosomes condense; nuclear envelope fragments permitting chromosome separation
5. replicated chromosomes separate by attaching to some other structural feature of the cell
Explanation:
In the given question, the DNA replication steps of both prokaryotes and eukaryotes are provided in which some are common to both eukaryotes and prokaryotes and some are unique to the prokaryotes and eukaryotes.
<u>Eukaryotes
</u>
1. Option-4 as the nuclear envelope is present in eukaryotes only.
2. Option-1 as centromere allows the kinetochores bind to the centromere which separates the chromosome.
<u>Bacteria
</u>
1. Option-3 as DNA replication process separates the strand of the DNA.
<u>Both
</u>
1. Option-5 as the chromosomes separate by other structures like microtubules
2. Option-2 as genetic material to be passed on to the generation must be replicated.
