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4 years ago

Which of the following best states the purpose of villi?

1 answer:

8 0

A. Increase surface area for purposes of absorption

Intestinal villi, plural of villus are projections that forms a surface mount. It is found in the digestive system, mainly in intestines that majorly functions in the absorption of food. It is a second to metabolism, it helps absorb nutrients in the intestines by expanding the surface area of the organ. Moreover, this plays a major roles in aiding the process of metabolism –breaking down of the food to be absorbed and, retrieved and delivered by the red blood cells.

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A graduate student in geology who grew up in Florida (near the southernmost tip of the United States) gets to accompany her rese

butalik [34]

Answer:

The following will be different at the North Pole from the way she remembers the sky in Florida:

(1) The celestial equator is on the horizon.

(2) The celestial pole is overhead

(3) The way the stars rise or set.

6 0

4 years ago

Build a dichotomous key to all the tissues you have seen in the lab. For this, you can use any of their morphological characteri

Mrac [35]

Answer + Explanation

Epithelia:

Simple squamous epithelium :single layer, flattened cells

Simple cuboidal epithelium : single layer, cube shaped cells

Simple columnar epithelium : single layer, elongated cells

Pseudostratified columnar epithelium : single layer, elongated cells

Stratified squamous epithelium : multilayered layers, top cells flattened

Stratified cuboidal epithelium : multilayered , cube shaped cells

Stratified columnar epithelium :top layer of elongated cells, lower layers off cube shaped cells

Transitional epithelium: many layers of cube shaped cells and elongated cells

Goblet epithelium : unicellular or multicellular.

Connective tissue ---

Areolar: consist of fibroblasts, macrophages, adipocytes, mast cells, plasma cells

Loosely arranged collagen, reticular and elastic fibers an gelatinous ground substance.

Adipose : adipocytes, fibres are reticular and collagen

Closely packed cells with a small amount of gelatinous ground substance.

Hyaline cartilage : chondrocytes, collagen fibers

Limited ground substance, dense and gel matrix.

Elastic cartilage : chondrocytes, elastic fibers

Limited ground substance, flexible but firm gel matrix.

Fibrocartilage: chondrocytes, collagen fibers

Limited ground substance intermediate between Hyaline cartilage and dense connective tissue.

Bone--- osteoblasts and introduced cells ,collagen fibres

Blood --- erythrocytes, leukocytes, platelets

Muscle ----

Striated skeletal muscles have characteristic cross-striations which are due to the regular arrangement of contractile elements, the sarcomeres.multinucleated.

Cardiac muscle are strained. Branched and shaped like fibers cross each other. One nucleus per cell.

Smooth muscles, as their name implies, do not have cross-striations. They are generally lighter in color than striated muscles.one nucleus per cell.

Both neurons and global cells consist of cell bodies and cell processes

3 0

4 years ago

balance the equation: KrF2+H2O -> Kr + O2 + Hf (the numbers are actually subscripts i just cant make them tiny on my keyboard

rosijanka [135]

Answer:

KrF2 + H2O -> Kr + O2 +2HF

Explanation:

You would just need to add a 2 on the HF, because on both sides it can balance with 2F's and 2 H's

5 0

3 years ago

Environmental changes cannot cause genetic mutation

Anarel [89]

If the environment is radioactive it can.
Example of radioactive genetic mutation ^^

Also if the environment has been polluted it can too.
Example of pollution genetic mutation would be a frog born with extra legs from living in a polluted pond

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3 years ago

Answers A: Arg, Gly, Ser B: Ser, Arg, Arg C: Ser Arg, Gly D: Met, Gly, Ser

slega [8]

Answer:

Explanation:

8 0

3 years ago