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Svet_ta [14]
2 years ago
10

During rem sleep, your skeletal muscles are relaxed because messages from the motor cortex are blocked by the

Biology
2 answers:
yaroslaw [1]2 years ago
8 0
Messages from the motor cortex are blocked by the brainstem.
MAVERICK [17]2 years ago
8 0

Answer:

Brainstem

Explanation:

During REM sleep , the electrical activity of our muscles get reduced or paralysed which is primarly due to blocking of messages by the brainstem.

Trigeminal motor neurons found in the brain cell helps in moving the muscles but during REM sleep, the two neurotransmitter receptors namely GABAA and glycine are paralysed by the brain stem and hence no muscle activity could be observed during the REM sleep

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To transplant a nucleus from one cell to another cell a scientist would use what
vitfil [10]
They would have to use micro dissection instruments 
6 0
2 years ago
Assume that there are 8 rats in the cage: 6 trained and 2 untrained. A rat is removed from the cage and it is noted whether or n
mojhsa [17]

Answer:

1. Option A

2. 56

Explanation:

1.

Option A

Option A is not a valid answer for this question as it is given that out of eight rats only two rats are untrained. Thus, an output which shows more that two untrained rats i.s UUTTU is a wrong answer

2.

8C_5 = \frac{8!}{5!(8-5)!} \\8C_5 = \frac{8*7*6*5!}{5! * 3!} \\8C_5 = \frac{8*7*6}{3*2*1} \\8C_5 = 56

Thus , there are 56 outcomes possible for this experiment

6 0
2 years ago
Scientists are researching a large family, many of whose members have Jackson-Weiss Syndrome, a disease that causes bone problem
Goryan [66]

The right answer is C.

A genetic disease is called autosomal dominant transmission when :

* The morbid allele ("sick" version, mutated of the gene in question) is on a non-sexual chromosome (neither X nor Y).

* The presence of a single morbid allele is sufficient for the disease to express itself.

The morbid allele is transmitted by either the father or the mother (or both, if they have the same inherited autosomal dominant genetic disease). Anyone with one of their affected parents is affected.

Jackson-Weiss syndrome is indeed an autosomal dominant disease characterized by a malformation of the feet, craniosynostosis of varying degrees, facial abnormalities, enlargement of the big toes and normal hands.

6 0
1 year ago
A patient has a large bruise so the phlebotomist collects a blood specimen distal to it. describe where the specimen was collect
olga55 [171]

Phlebotomy refers to a collection of venous blood. This operation can be practiced on all the superficial veins of the body, on those of the foot, the leg, the neck, the whole upper limb. It must be done in an area where there is a protruding vein and the least sensitive to limit pain to the patient. It should not be done in an altered, injured or infected area (like bruise)

The blood is collected on tubes with or without anticoagulant according to the analyzes that one wants to practice.

The reason for choosing the sampling site is for the most part practical, the veins are easily identifiable, and easily accessible for paramedical personnel. Their collection is less dangerous than that of arteries, which are generally thinner and close to the peripheral nerves.

6 0
2 years ago
Read 2 more answers
Mannitol salt agar (MSA) only allows the growth of halophiles (salt-loving microbes). Among the halophiles, mannitol fermenters
Monica [59]

Answer:

B. differential

Explanation:

The culture medium is a chemical preparation that has the necessary nutrients for microorganisms of a given biological sample to multiply, allowing its study, identification and analysis. The main components of a culture medium are sources of carbon, energy (sugars), nitrogen, phosphorus and minerals.

There are several types of culture medium, among them we can mention the differential culture medium, which is the type of medium that is being used in the experiment shown in the question above. The differential culture medium allows the distinction between various genera and species of similar microorganisms. This distinction is possible because this type of culture medium has substances that allow for a presumptive differentiation, evidenced by the color change or the morphology of the colonies.

8 0
2 years ago
Read 2 more answers
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