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lilavasa [31]
3 years ago
5

In describing a contracted sarcomere vs. a relaxed sarcomere, the contracted lacks which structures/components, while they are p

resent in the relaxed sarcomere.
Where 1. A-band 2. I-band 3. Z discs 4. H-zone 5. M-line

A. 1 & 2
B. 3 & 4
C. 3, 4 & 5
D) 1 & 4
E) 2 & 4
Medicine
1 answer:
Aliun [14]3 years ago
5 0

Answer:

The correct answer will be option E- 2 & 4.

Explanation:

The sarcomere is a segment made up of thick and thin filaments between the two Z-lines or disc of a myofibril.

Sarcomere structurally can be divided into bands:  

  1. A-band- which is also known as the anisotropic filament is made up of thick filaments called myosin.
  2. H-zone- the zone in the A-band which appears lighter in color in the microscope  
  3. I-band- an isotropic band made of thin filament called actin.

Upon contraction of muscle, these filaments form an overlapped structure due to which I-band shortens along with H-zone of A- band. Due to the shortening of these bands, only A-band without H-zone and I-band appears between two A-lines. These bands upon relaxation again take their normal form.

Thus, option E- 2 & 4 is the correct answer.

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Answer:

See explanation for answer.

Explanation:

The following are the actions I will take:

1.  I would Firstly contact Taylor & tell that on one tube no label & on another there is only s written.

2.  I would not do the test as even if I do, then the result will be varying for   the two.

3. I would ask for repeat sample as test won't be done for the previous samples.

4. - Fill in the CQI (Continuous Quality Improvement) form & submit it to the Quality department for the root cause analysis.

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3 years ago
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Which is NOT an age related change in the circulatory system?
kakasveta [241]

Answer:

c

Explanation:

in the body the blood vessels always stay in tack and they can never get old.

6 0
2 years ago
#1 True or False: Body Growth and Brain Development in Infancy and Toddlerhood (pp. 162–174) Directions: Read each of the follow
rodikova [14]

Answer:

Since there are so many true and false questions, the answers and their short explanation, are as follows:

1. False. Children tend to gain weight from birth till they reach the 2-year line and from then on, into middle childhood, they tend to trim down.

2. False. The reverse is true. When skeletal age is used to measure body development, epsecially bone growth, it is African American children that have a slight advantage over their Caucasian counterparts.

3. True. Between childhood and adolescence, the body prunes about 40% of the synapses that have been formed by the brain, as they will not be necessary later in development. This helps to prepare the brain for what it will become later in life.

4. False. Young children, and especially infants, need to move, and are anxious in small spaces. both of these diagnostic procedures require the child to be static, and that is not possible. This is why EEG is a more common procedure to be used; it allows children to be sitting with their parents and to move.

5. True. The cerebral cortex continues growing from childhood into adolescence, and it develops more rapidly than any other region of the brain as it is the one that is most stimulated during those years.

6. False. The cerebral cortex has two hemispheres but each one specializes on certain activities. This does not mean that both do not colaborate in all tasks, but each has specialized tasks to perform.

7. True. Plasticity is a characteristic of the young brain. However, even during childhood, if injury occurs, this does not mean there will not be consequences. It just means that the brain is able to cope with the deficiency and establish mechanisms of compensation that the adult brain cannot do.

8. True. The period between 6 months and 2 years is especially active in development of social, physical and emotional skills. So understimulation and the lack of proper resources and support systems does cause problems in development.

9. False. This is basically a myth. Overstimulation of the child´s brain will not ensure they are more proficient or better, and much less that they become superbabies.

10. True. The more social contact a baby has, paired with genetics of course, the more stimulated the brain becomes and the more development is benefited. And the more developed a baby´s brain is, the further interaction he/she will have with his/her environment, to increase development.

8 0
3 years ago
Which spinal plexus gives rise to the phrenic nerve, and what organ does this nerve supply?.
givi [52]
  • The phrenic nerve is derived from the cervical plexus and receives innervation from the C3, C4, and C5 nerve roots. It is the longest branch of the cervical plexus.

Why does phrenic nerve supply diaphragm?

  • The C3-C5 spinal nerves in the neck give rise to the phrenic nerve, a mixed motor and sensory nerve.
  • The diaphragm, the main muscle of respiration, is exclusively controlled by the nerve, making it essential for breathing.

What organ does this nerve supply?.

  • The jejunum receives both intrinsic and extrinsic nerve supply.
  • The preganglionic parasympathetic and postganglionic sympathetic branches of the celiac plexus provide the autonomic extrinsic supply.
  • These neurons go via branches of the major vessels from the mesentery into the jejunum.

What are the 4 types of nerves?

It is conventional, however, to describe nerve types on the basis of their function: motor, sensory, autonomic or cranial.

  • Motor Nerves.
  • Sensory Nerves.
  • Autonomic Nerves.
  • Cranial Nerves.

Learn more about phrenic nerve

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5 0
1 year ago
the nurse is assessing the functioning of a chest tube drainage system in a client with a chest injury who has just returned fro
NikAS [45]

The correct answer choice which is the expected assessment findings about the assessment of the functioning of a chest tube drainage system in a client with a chest injury who has just returned from the recovery room following a thoracotomy with wedge resection is:

Drainage system maintained below the client's chest.

Option 3 is the correct answer

In order words, the correct assessment finding for this health problem is drainage system maintained below the client's chest

<h3>What is thoracotomy?</h3>

In medicine, when the chest is diagnosed to have some diseases or health defect, a surgical incision will done on it by by surgeon. This surgery done on chest is called thoracotomy.

So therefore, the correct answer choice which is the expected assessment findings about the assessment of the functioning of a chest tube drainage system in a client with a chest injury who has just returned from the recovery room following a thoracotomy with wedge resection is:

Drainage system maintained below the client's chest.

Option 3 is the correct answer

Complete question:

The nurse is assessing the functioning of a chest tube drainage system in a client who has just returned from the recovery room following a thoracotomy with wedge resection. Which are the expected assessment findings?

1. Excessive bubbling in the water seal chamber

2. Vigorous bubbling in the suction control chamber

3. Drainage system maintained below the client's chest

4. 50 mL of drainage in the drainage collection chamber

5. Occlusive dressing in place over the chest tube insertion site

6.Fluctuation of water in the tube in the water seal chamber during inhalation and exhalation

Learn more about health problems:

brainly.com/question/1382377

#SPJ1

6 0
1 year ago
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