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N76 [4]
3 years ago
6

Water molecules are fairly small, and their small size allows them to diffuse passively across a cell membrane. Which type of pa

ssive transport is this?
A) Osmosis
B) Facilitated Diffusion
C) Endocytosis
D) Diffusion
Biology
1 answer:
Flauer [41]3 years ago
6 0

The passive transport used by water molecules to move across a cell membrane is called Osmosis.

In the case of water molecules, they do not require any specialized help to cross the cell membrane, for this reason, option B which indicates diffusion through the help of carrier proteins, is false. Option C is false as well given that Endocytosis is a form of active transport.

The remaining options are Diffusion and Osmosis. Though very similar, there is one key difference between the two. Diffusion occurs when particles move from a place of higher concentration to a lower concentration point, in order to achieve equilibrium.

The difference from Osmosis is that in Osmosis, the solvent particles can move without the need for other particles to move. This is the case for the small water molecules and because of this, the correct option is A.

To learn more:

brainly.com/question/21395644?referrer=searchResults

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Pain signals often have two components: an acute sensation of "first pain" which is felt almost immediately after an injury, and
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This suggests that neurons that send the signals that we perceive as first pain Myelinated Tpye A-delta___, and neurons that send the signals that we perceive as second pain Unmyelinated-Type C.___.

Explanation:

Physiologically, primary afferent neurons that innervated the the touch, pain, temperature,and pressure receptors in the effectors  to input sensory signals to the spinal cord and the brain  are categorized based on their diameter, sizes, and nature of  myelination. Based on this;

<u>A-alpha has the largest diameter, myelinated, and sensitive to sensation from the muscle cells</u>

<u>A-beta are next in diameter, myelinated and sensitive to sensation  of touch.</u>

A-delta followed in diameter, and  size. They are mylinated, and sensitive to pain and temperature.

<u>C-fibres are least in diameter, they are unmyelinated, but sensitive to pain, touch and temperature.</u>

<u />

<u>Therefore, if the speed of conduction,of action  potential in a neuron depends on the diameter(thickness) and myelination of the axon(saltatory conduction)</u> :

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