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3 years ago

What determines if a particle can cross a cell membrane? *

Biology

1 answer:

Liula [17]3 years ago

6 0

Answer:

Lipophilic (non-polar molecules), such as steroid hormones or O2 gas can pass... very small uncharged polar molecules (such as H2O, ethanol and urea) can also get through... otherwise you need a membrane protein to "facilitate" the transport of the molecule across the membrane, ion channels are used for water, or charged molecules; carriers/transporters are used for other molecules.

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What types of tissues/cells are found in the dermis?

qwelly [4]

The epidermis containsstratified squamous epithelium. The dermis contains connective tissue(areolar, dense irregular, blood), some smooth muscle (erector pili muscles) and some nervous tissue (nerves). Name the five layers of epidermis.

Hoped this helped!

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3 years ago

The nurse is required to wear a gown, gloves, goggles, and mask as personal protective equipment (PPE) when caring for an assign

Ivahew [28]

Gown

The nurse would put on the gown first when utilizing personal protective equipment (PPE). The nurse would then put on the mask, goggles, and gloves.

<h3>What is the sequence followed while wearing a personal protective equipment (PPE)?</h3>

STEP 1: GOWN

Cover the entire body, from the neck to the knees, the wrists to the end, and the back.
Fasten around the waist and neck.

STEP 2: SHOE COVERS

Layer shoes with shoe covers on top.

STEP 3: GLOVES

Apply the first set of gloves and inspect them for tears.
Thumb hole made in lab coat
Thumb through opening in lab coat after pulling it over the hand
Put on a second set of gloves (extend to cover wrist)

STEP 4: MASK OR RESPIRATOR

As you cup the respirator in your hands, place the nosepiece there.
With the nosepiece up, place the respirator under your chin. Pull the top strap over your head, putting it at the back of your head.
Pull the bottom strap so that it is around your neck and just behind your ears.
Mold the nose using two hands.
Put both hands over the mask and take a forceful breath out.
If air leaks, adjust the mask.

STEP 5: GOGGLES OR FACE SHIELD

Put over face and eyes, then make adjustments to fit

Learn more about PPE here:

brainly.com/question/17663098

#SPJ4

4 0

2 years ago

lina2011 [118]

Explanation:

The nucleus (plural, nuclei) houses the cell's genetic material, or DNA, and is also the site of synthesis for ribosomes, the cellular machines that assemble proteins. Inside the nucleus, chromatin (DNA wrapped around proteins, described further below) is stored in a gel-like substance called nucleoplasm.

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3 years ago

Do you think the vacuum hose is an effective way to remove sea urchins? Why? Explain at least one way this technology can be imp

mamaluj [8]

Answer:

No, or at least not yet. there small and dont do much improvment. If they were much bigger and sucked better, including some touch-ups here and there, they would have a bigger effect on removing sea urchins.

Explanation:

4 0

2 years ago

Pls help fast

Nimfa-mama [501]

The answer is Tree because it is a plant which means it has cellulose tubes.

Hope this helps!!

7 0

4 years ago