Which of the following statements about bulk transport is...

Which of the following statements about bulk transport is ACCURATE? Select all correct choices -receptor-mediated endocytosis is less selective than phagocytosis and pinocytosis -vesicles are involved in endocytosis and exocytosis -receptor-mediated endocytosis brings substances into a cell, while phagocytosis and pinocytosis release substances from a cell -pinocytosis brings in much larger compounds than phagocytosis -receptor-mediated endocytosis is selective, while phagocytosis and pinocytosis are non-selective

Transcript

00:01 In order to answer this question, let's talk about bulk transport.

00:07 So this back transport is the movement of large molecules or large amounts of small molecules across the membrane.

00:16 Okay? it takes place either by endocytosis or exocytosis.

00:28 Okay, and when we talk about photosytosis, we talk about phyocytosis, pinocytosis, and receptor, mediated endocytosis.

00:46 Okay, remember that endocytosis is going to pull molecules from outside, like into the intracellular, and extraceotosis is going to move a substance from the intracellular towards like outside.

01:00 When we talk about pinocytosis, pynecytosis is practically the process, or well, a mode of endocytosis, in which a small particle suspended in the extracellular part of a cell, it means if this is your cell membrane, okay.

01:14 And here you have some small molecules.

01:17 Okay, this small particle suspended in this extracellular space are brought into the cell through an imagination of a cell membrane.

01:25 So, for example, if this is a particle or a small particle, it's going to be invalinated by the cell membrane.

01:33 And it is going to get inside here, okay? like this.

01:39 For example, it works for molecules of water in order to take...

01:43 Or to bring water inside of the cell.

01:46 Okay, and this process is non -specific.

01:49 This process is not specific for the substances.

01:51 It is going to move.

01:53 It is only going to move small substances, but it is not going to be specific for that substances.

01:58 It is going to move.

02:00 Our phagocytosis, phagocytosis is part, remember that this function is part of some cells that are part of immune response.

02:07 It's specifically about innate immune response.

02:10 So, if this is your macrophase, for example, it is going to extend, and we have here a big particle, for example, bacteria, and the macrophage is going to extend its cell membrane in order to engulf this particle.

02:27 And it is going to engulf it like this, in a vesicle too.

02:33 Okay, and this process is also non -specific.

02:35 Because as this macrophage is part of the innate in young response, it is going to, it is a non -specific immune response where it is going to respond in the same...

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