UDOC 2025

Front

What is the role of the thalamus in sensory processing?

Back

The thalamus acts as a relay station for sensory information, processing external sensations except for olfaction (smell), which is processed directly by the olfactory bulb.

Front

What hormone signals hunger in humans?

Back

Ghrelin is the hormone that signals hunger, stimulating appetite and food intake.

Front

What is the mechanism that limits ion overflow during a refractory period?

Back

Inactivation is the mechanism that prevents excessive ion flow during the refractory period of a neuron.

Front

How many millions are in one trillion?

Back

One trillion is equal to one million millions.

Front

Which functional group contains no double bonded oxygens?

Back

An ether is a functional group that contains no double bonded oxygens.

Front

What is the function of cholecystokinin in the human body?

Back

Cholecystokinin is a hormone that stimulates the digestion of fat and protein.

Front

What is the difference between activation and inactivation in neuronal signaling?

Back

Activation refers to the opening of ion channels, while inactivation refers to the closing of these channels to prevent further ion flow.

Front

Define leptin and its role in the body.

Back

Leptin is a hormone produced by adipose (fat) tissue that helps to regulate energy balance by inhibiting hunger.

Front

What is the significance of the refractory period in neurons?

Back

The refractory period is crucial for ensuring that action potentials are unidirectional and for allowing the neuron to recover before firing again.

Front

What is an aldehyde?

Back

An aldehyde is a functional group characterized by a carbonyl group (C=O) bonded to a terminal carbon atom.