Help………………………………………………………

4. Why might a physician order a test in the spine to diagnose a problem in the head?<br> I

stepan [7]

Answer:

if you have headaches or migraines, your doctor may use a spinal tap to look for signs of infection, bleeding in the brain, to measure the pressure around your brain, or other things that could be causing your pain

Explanation:

6 0

3 years ago

In the cross AaBbCc × AaBbCc, what is the probability of producing the genotype AABBCC? In the cross AaBbCc × AaBbCc, what is th

uranmaximum [27]

Answer:

1/64

Explanation:

Parent 1: AaBbCc

Parent 2 : AaBbCc

When the cross is checked for individual gene:

Aa X Aa =

A a

A AA Aa

a Aa aa

Probability of producing an AA organism is 1/4

Similarly, probability of producing a BB from Bb X Bb would be 1/4

Probability of producing a CC from Cc X Cc would be 1/4

Hence, probability of producing an AABBCC would be:

1/4 * 1/4 * 1/4 = 1/64

4 0

4 years ago

According to _____, during rapid eye movement (REM) sleep, the brain tries to make sense of neural activity in the vestibular sy

Irina-Kira [14]

Activation Synthesis Model

The activation-synthesis model is proposed by Harvard University psychiatrist John Allan Hobson and Robert McCarley. It is a neurobiological explanation of why and what happens in the brain and body during dreaming. The model hypothesized that dreams result from brain activation during REM sleep.

5 0

3 years ago

In plants tall (T) is dominant to short (t) and round seed is dominant to wrinkled seeds (r). If a parent is short and wrinkled

Nuetrik [128]

Answer:

Parent cross= ttrr (short, wrinkled) × TtRr (hybrid)

POSSIBLE GAMETES BY EACH PARENT:

ttrr - tr, tr, tr, and tr

TtRr - TR, Tr, tR, and tr

Explanation:

This question involves two genes in a certain plant. One gene is coding for height while the other is coding for seed shape. The alleles for tallness (T) and round seeds (R) is dominant over the alleles for shortness (t) and wrinkled seeds (r).

According to this question, a parent that is short and wrinkled (ttrr) is crossed with another parent that is hybrid (TtRr) for both traits. This means that the parent cross is as follows: ttrr × TtRr

The possible combination of gametes that will be produced by each parent is as follows:

ttrr - tr, tr, tr, and tr

TtRr - TR, Tr, tR, and tr

See attached image for the punnet square using these gametes.

6 0

3 years ago

How do neurons communicate? place in order the sequence of events that occurs when a neuron fires?

monitta

Answer;

-Dendrites receive chemical signals.

-When more excitatory than inhibitory signals are received, the cell depolarizes.

-An action potential is set off and travels through the cell and down the axon.

-The action potential excites the terminal buttons to release their chemicals into the synaptic cleft.

Explanation;

-The electrical signal that passes along the axon and subsequently causes the release of chemicals from the terminal buttons

. Chemical signals (excitatory and inhibitory signals.

-Positive sodium pours into the breach, Action potential propagates along the axon, after firing returns to its slightly negative resting state.

-An action potential can be generated if the amount of excitatory input can raise the membrane potential to -55 mV. This then floods the cell with sodium ions and raises the membrane potential. When it reaches a certain point (about +30 mV), the sodium ion channels close and the potassium ion channels open. This drops the membrane potential back down.

6 0

4 years ago