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3 years ago

A body part that must resist unpredictable stress from multiple directions would likely be composed of which tissue

Biology

1 answer:

sukhopar [10]3 years ago

7 0

Answer;

Dense irregular connective tissue - Dermis (skin)

A body structure that must resist unpredictable stress from multiple directions would logically be composed of dense irregular connective tissue.

Explanation;

-Dense irregular connective tissue has fibers that are not arranged in parallel bundles as in dense regular connective tissue. These tissues are found in several locations: the dermis of the skin, the walls of large tubular organs, such as the alimentary canal, in glandular tissue, and in organ capsules.

-Due to high portions of collagenous fibers, dense irregular connective tissue provides strength, making the skin resistant to tearing as consequence of stretching forces from different directions. It also makes up submucosa of the digestive tract, fibrous capsules of joints and lymph nodes, and some types of fascia.

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Fill inn the blank

azamat

the answer is h o m o z y g o u s for the first and I think Each is the second one

8 0

3 years ago

Which kingdom would include organisms that are all heterotrophic and motile?

zlopas [31]

Answer:

Animalia, essentially

Explanation:

First, let's define our terms -

Heterotrophic: consumes other organisms to survive, as opposed to autotrophic

Motile: can move around, as opposed to sessile

There is debate on what constitutes a kingdom, but I generally go with the 6 kingdoms model, which includes animalia, plantae, fungi, protista, eubacteria, and archaebacteria.

Fungi, though heterotrophic, include mushrooms, which are obviously stationary (sessile). So we can rule them out.

Plantae are your traditional plants, which clearly fit neither of the categories, being sessile and phototrophic (they get energy from light, not other organisms.)

Archaebacteria are mostly autotrophs. I doubt they would be considered anyway.

Eubacteria, your traditional bacteria, include cyanobacteria, which are photosynthetic, and other exceptions. I don't think this is what the question is going for.

Protista are essentially the spare parts drawer of the kingdom system. They vary widely in being hetero- or autotrophic, so they certainly don't fit the criteria.

I can only conclude that this question is asking for animalia, which for the most part are heterotrophic and motile. (An exception is the most primitive, sponges or porifera, which are sessile and can't move around, but I expect this is what the question is looking for.) Because heterotrophy and motility are two defining features of animalia, most likely this is what the question is asking. This is a difficult question, because biologists themselves aren't real decided on the right answer.

4 0

3 years ago

Does bacteria have a vacuole?

Mekhanik [1.2K]

Answer:

yes bacteria has a vacuole

Explanation:

4 0

4 years ago

Read 2 more answers

Which of the following is NOT a functional classification for joints?

REY [17]

Answer: cartilaginous

Explanation:

synarthrosis – There is little or no mobility. Most synarthrosis joints are fibrous joints (e.g., skull sutures).

amphiarthrosis – allows joints to have slight mobility.

diarthrosis – freely movable joints.

cartilagnious is cartilage type of strong stretchy tissue found in the joints.

5 0

4 years ago

Match each of the four barriers of innate immunity with its mode of action.

serg [7]

The matches are

A. anatomical barrier is matched with 1. secretion of sweat, saliva, and tears.

The epithelium is a physical barrier constituting one of the first defenses against infectious agents. The desquamation of the epidermis thus eliminates bacteria or other infectious agents that have adhered to the surface of the epithelium. In the digestive tract and the respiratory tract, the movement operated by the peristalsis or the eyelashes contribute to the elimination of the infectious agents. The intestinal flora prevents colonization by pathogenic bacteria acting in particular by competition for nutrients. Tears and saliva also help prevent infection of the eyes and mouth, respectively.

B. physiological barrier is matched with 4. changes in pH and temperature.

In addition to this physical (or anatomical) barrier, the acidic pH and low moisture content of the stratum corneum, and the skin temperature below 37 ° C, are detrimental to bacterial growth. Finally, the presence of antimicrobial peptides and lipids make the epidermis a true defender against infection.

C. phagocytic barrier is matched with 3. signaling to macrophages.

Macrophages are cells belonging to white blood cells (leucocytes), which infiltrate tissues. They come from the differentiation of circulating blood leukocytes, monocytes. Monocytes and macrophages are phagocytes and are therefore capable of phagocytosis.

They participate in innate immunity as a non-specific defense, but are able to participate in adaptive immunity via opsonization.

D. inflammatory barrier is matched with 2. secretion of chemicals.

In an inflammatory reaction, blood flow increases at the lesion area. The blood vessels become more permeable thanks to vasodilator chemical substances, which allows the migration of cells from the blood to the tissues (the call is made using chemokines). The first cells arriving at the site of inflammation are often neutrophils, then macrophages arrive and then lymphocytes if there is immune stimulation.

3 0

4 years ago