Types of Protein Channels and Their Selective Permeability

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What is the main function of gating in protein channels?

Aiding in cell division

Regulating the ion permeability of the channels (correct)

Modifying the channel's size

Promoting protein synthesis

Which type of channels have gates that can open or close them?

Positively charged channels

Uncharged channels

Negatively charged channels

Gated-channels (correct)

In which mode of nerve impulse conduction does the flow of nerve impulse occur slower?

Voltage-gated conduction

Continuous conduction (correct)

Saltatory conduction

Chemical-gated conduction

Which structure contains synaptic neurotransmitters in a neuron?

Terminals knobs Signup and view all the answers

What is the role of myelin sheath in neurons?

Acting as an insulator Signup and view all the answers

Which method controls the opening and closing of protein channel gates?

Voltage-gating and chemical gating Signup and view all the answers

What is the role of channel proteins in facilitating substance transport across a cell membrane?

They facilitate transport by either facilitated diffusion or active transport based on concentration gradient. Signup and view all the answers

In secondary active transport, where does the energy used for transport come from?

From the ionic concentration gradient created by primary active transport Signup and view all the answers

What distinguishes endocytosis from exocytosis in terms of material transport?

Exocytosis involves moving large materials out of the cell, while endocytosis moves large materials into the cell. Signup and view all the answers

What characterizes phagocytosis in terms of material movement into cells?

Phagocytosis is the process of moving large solids into the cell. Signup and view all the answers

Which statement accurately describes how channel proteins operate in substance transport?

They facilitate substance transport based on concentration gradient without using ATP directly. Signup and view all the answers

What is one of the key roles of secondary active transport in cellular function?

It derives energy from ionic concentration gradients created by primary active transport. Signup and view all the answers

What is the main function of transport proteins in facilitated diffusion?

Select only certain molecules to cross the membrane Signup and view all the answers

Which type of molecules can be transported through channel proteins in facilitated diffusion?

Larger or charged molecules Signup and view all the answers

In active transport, what is the direction of movement of substances?

From low to high concentration Signup and view all the answers

Which type of active transport requires an additional source of energy such as ATP?

Primary active transport Signup and view all the answers

What is the main difference between facilitated diffusion and active transport?

Active transport requires energy input Signup and view all the answers

Which type of active transport indirectly derives energy from ionic concentration gradients created by another process?

Vesicular transport Signup and view all the answers