AP PSYCHOLOGY

BIOLOGICAL BASES OF BEHAVIOR

BIOLOGICAL PSYCHOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In comparison to metabotropic receptors, ionotropic receptors produce effects that
A
are more diffuse
B
develop more rapidly
C
are more enduring
D
are twice the voltage
Explanation: 

Detailed explanation-1: -While ionotropic receptors are typically ligand-gated ion channels, through which ions pass in response to a neurotransmitter, metabotropic receptors require G proteins and second messengers to indirectly modulate ionic activity in neurons.

Detailed explanation-2: -Ionotropic and metabotropic signalling pathways are fundamentally different in their temporal properties. The former are usually faster, operating on a millisecond (ms) to sub-ms timescale, as ligand binding directly gates the ion channel.

Detailed explanation-3: -Since opening channels by metabotropic receptors involves activating a number of molecules in the intracellular mechanism, these receptors take longer to open than the inotropic receptors. They have a much longer effect than ionotropic receptors, which open quickly but only remain open for a few milliseconds.

Detailed explanation-4: -Ionotropic receptors have a quicker response time than metabotropic, as they are directly linked to the ion channel.

There is 1 question to complete.