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igor_vitrenko [27]
1 year ago
15

If a muscle fiber were to suddenly and permanently stop producing ATP the fiber would no longer be able to actively transport ca

lcium out of the cytoplasm (sarcoplasm) and the intracellular calcium concentration would rise. Which of the following would you expect to happen? A. Calcium would be transported to the sarcoplasmic reticulum therefore contractions would cease. B. Myosin would be able to bind to the exposed binding sites on thin filaments but it would not be able to detach. C. The fiber would twitch uncontrollably due to excessive calcium bound to troponin. D. No change would occur in a muscle that was relaxed to begin with.
Biology
1 answer:
Lyrx [107]1 year ago
7 0

Answer:

A. Calcium would be transported to the sarcoplasmic reticulum therefore contractions would cease.

Explanation:

A muscle fibre will stop contraction immediately ATP is used up. Also, muscle contraction will end as soon as the information from the motor neuron stops. This repolarizes the sarcolemma and T-tubules, thereby closing the voltage-gated calcium channels in the sarcoplasmic reticulum. Calcium ions are then pumped back into the sarcoplasmic reticulum, in order for tropomyosin to cover the binding sites on the actin strands again.

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Carbohydrates on the surface of leukocytes play an important role in responding to infection or inflammation. Place the followin
svlad2 [7]

Answer:

E, A, B, D, C

Explanation:

Leukocytes are cells that are found in the blood stream and they help identify foreign materials and fight against them, they are also called white blood cells.

The process that is given in the question looks like this when the steps are put in the right order;

E, cytokines are secreted where needed and they signal certain cells according to the action that needs to be taken.

A, endothelial cells which are located on the surface of the blood vessels produce selectins.

B, selectins which are proteins that are made up of single chain and help with the cell adhesion with other molecules, carbohydrates in the example.

D, leukocytes roll along the walls of the blood vessel.

C, and lastly leukocytes crawl out of the vessel into the adjacent tissue.

I hope this answer helps.

5 0
1 year ago
Read 2 more answers
Name the three principal ways in which a load may be applied to a specimen.
SVETLANKA909090 [29]
The <span>principal ways in which a load may be applied to a specimen are:
1. Tension
2. Compression
3. Shear
</span>

The force that pulls material apart is tension and the one that squashes material together is compression and shear is the action of the force in trying to cut through the material.

<span> </span>

<span>

</span>
8 0
2 years ago
Besides the ability of some cancer cells to over proliferate, which of the following situations might logically result in a tumo
Vaselesa [24]

Answer: A

Explanation: Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor.

8 0
2 years ago
Match the following vocabulary words. 1.ciliary musclesA transparent liquid which is located between the cornea and iris. 2.opti
klio [65]

Answer:

1. Aqueous humor.

2. Ciliary muscles.

3. Cone.

4. Cornea.

5. Iris.

6. Optic nerve.

7. Photoreceptor.

8. Retina.

9. Rod.

10. Sclera.

11. Vitreous humor.

Explanation:

A sensory system can be defined as components of the central nervous system (CNS) which comprises of the brain, neural tissues or pathways and sensory neurons responsible for sensory functions, perception and processing sensory informations such as sound, light, heat, etc.

Basically, the central nervous system (CNS) interprete the neural signals that are generated from stimuli that are detected by the sensory system. The five (5) main sense organs in the sensory system are: skin, tongue, ears, nose and the eyes.

An eye can be defined as a specialized organ of sight with the capability to receive visual images that are subsequently transduced into neural signals and relayed to the brain for processing and interpretation. Some of the components of the human eye matched with their description are;

1. Aqueous humor: a transparent liquid which is located between the cornea and iris.

2. Ciliary muscles: muscles attached to the lens to change its shape.

3. Cone: a photoreceptor cell which functions best in bright light. It detects color.

4. Cornea: the transparent portion of the sclera at the front of the eye.

5. Iris: a special part of the choroid layer composed of colorful tissue.

6. Optic nerve: the nerve connecting the eye to the brain.

7. Photoreceptor: specialized cells located in the retina that receive light images.

8. Retina: a delicate light-sensitive membrane covering the inside of the eyeball.

9. Rod: a photoreceptor cell which is sensitive to dim light, but detects no color.

10. Sclera: a fibrous material surrounding the eye to give it shape.

11. Vitreous humor: a transparent jellylike substance filling the eyeball.

8 0
1 year ago
Read 2 more answers
The ATP that is generated in glycolysis is produced by substrate-level phosphorylation, a very different mechanism than the one
Gwar [14]

Answer:

The correct statements are a, b and d. The incorrect statements are c and e.

Explanation:

Substrate level phosphorylation signifies the generation of ATP from ADP and a phosphorylated intermediate. On the other hand, in oxidative phosphorylation, the formation of ATP takes place from ADP and Pi, that is, an inorganic phosphate.  

In substrate-level phosphorylation an enzyme is needed for the reaction to take place. In the process, a dissociation of bond takes place between an organic molecule and a phosphate prior to the formation of ATP. In this, one of the substrates is a molecule obtained from the dissociation of glucose.  

In substrate-level phosphorylation, the enzyme taking part in the synthesis of ATP is not required to get attached to the membrane to generate ATP. The phosphate group, which is added to ADP to produce ATP does not come from free inorganic phosphate ions.  

6 0
1 year ago
Read 2 more answers
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