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Leviafan [203]
2 years ago
15

Help no links or you'll be reported

Biology
1 answer:
Mrrafil [7]2 years ago
6 0

Answer:

Two groups of proteins, called cyclins and cyclin-dependent kinases (Cdks), are responsible for the progress of the cell through the various checkpoints. Cyclins regulate the cell cycle only when they are tightly bound to Cdks.

Explanation:

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S_A_V [24]

Answer:

1.The pleural cavity aids optimal functioning of the lugs during breathing. It transmits movements of the chest wall to the lungs, particularly during heavy breathing. The closely approved chest wall transmits pressures to the visceral pleural surface and hence to the lung (10-19.

2.The diaphragm, located below the lungs, is the major muscle of respiration. It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarge.

Explanation:

3 0
3 years ago
Read 2 more answers
________ attach skeletal muscles to bones, and ________ connect one bone to another
Kay [80]

Answer: B. Tendons; ligaments

Explanation: Tendons are white, inelastic and tough connective tissue that attach skeletal muscle to bone. Tendons attach muscles to structures such as the eyeball. Fibres in tendons are arranged as compact parallel bundles.

A ligament is a yellow, elastic and strong fibrous connective tissue which attaches bone to bone. Ligaments usually hold bones together and keep them stable. Fibres of the ligament are compactly packed and but they are not arranged in parallel bundles as that of tendons.

4 0
3 years ago
A protein kinase can phosphorylate an enzyme and activate it by
Zinaida [17]

Answer:

Signal transduction

Explanation:

A signal molecule binds to a receptor.

A conformational change in the signal-receptor complex activates an enzyme.

Second messenger molecules are released.

Protein kinases are activated.

Target proteins are phosphorylated.can be defined as the process in which a physical or chemical signal is transmitted through a cell as a series of molecular events inform of protein phosphorylation are catalyzed by protein kinase and this ultimately result into a cellular response. However, the protein that is responsible for the detection of stimuli is commonly refers to as receptors or sensor.

4 0
2 years ago
Leukopenia is a condition characterized by a decrease in white blood cells. What effect does leukopenia have on the body's abili
Korolek [52]

Leukopenia means  a low count of white blood  cells in the body. When there is a low white blood cell count in the body, and in particular a low level of neutrophils (a kind of white blood cell that fights infection), there is quite a significant risk of developing an infection, and once an infection is developed and the white blood cell count is low, the body will not be able to protect itself and fight off the infection. In severe cases , infection may lead to death.


6 0
3 years ago
Read 2 more answers
write one clear sentence using all the words in the set that demonstrates your understanding of their relationship here are the
SIZIF [17.4K]

Answer:

Microtubules have shapes like a spindle and are arranged to form centrosome and a cluster of such microtubules form centriole.

Explanation:

Microtubules are seen in eukaryotic cells to give shape and structure to the cells and they form part of the cytoskeleton. They are known to grow long and are dynamic. Centrosomes are known to be main microtubule that are found in animal cells. They are organelles that are made from the arrangement of clusters of microtubules. The centrioles are organized microtubules that actually help to serve as skeletal system of the cell. These centrioles  help to determine the locations of the nucleus.

6 0
2 years ago
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