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m_a_m_a [10]
3 years ago
9

What do comets and asteroids have in common?

Biology
1 answer:
umka21 [38]3 years ago
4 0
Answer :
B.) they orbit the sun
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Explain why facilitated diffusion may need to occur and in what direction the particles diffuse in. Identify the molecules that
Goryan [66]

Answer:

Sometimes molecules cannot move through the cell membrane on their own. These molecules need special transport proteins to help them move across the membrane. Facilitated diffusion is the diffusion of substances with the help of transport proteins in the plasma membrane. These special proteins are called channel proteins or carrier proteins, and they are attached to the cell membrane. In fact, they go through the cell membrane, from the inside of the cell to the outside. Facilitated diffusion is used for molecules that cannot diffuse rapidly through cell membranes on their own, even when the molecules are moving from high to low concentration areas. An example is the sugar plants and animals use for energy, called glucose. Even though facilitated diffusion involves transport proteins, it is still passive transport because the solute is moving down the concentration gradient so it does not require the use of cellular energy.

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2 years ago
The type of chemoreceptor responsible for our sense of smell is called a(n) ________.
astraxan [27]
Chemoreceptor is a specialized sensory receptor cell, which responds to a chemical substance and generates a biological signal.
The type of chemoreceptor responsible for our sense of smell is called olfactory receptor. It is also known as odorant receptor, these are found in a small patch of tissue high inside the nose. These cells directly connected to the brain.
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3 years ago
HELP NEEDED PLEASE!!
emmasim [6.3K]

Answer:

B

Explanation:

Nerve cells can carry signals and connect all parts of the body to the brain

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Does the following equation represent photosynthesis or cellular respiration?
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