neurons and synaptic transmission

What is a neuron?

Neurons send _ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ _ and _ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ _ messages around the body to sense organs, glands and other organs.

Which one of the following is not a component of a neuron? a) Myelin sheath b) Axon c) Cortex d) Dendrites e) Terminal knobs e) Cell body

Name the three types of neurons.

The gap between two neurons is the: a) synaptic cleft b) node of Ranvier c) action potential

The role of sensory neurons is to send information from the _ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ _ nervous system to the _ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ _ nervous system.

True or False? Sensory neurons can only send messages one way but cannot receive messages.

Sensory neurons have: a) long dendrites and long axons b) short dendrites and long axons c) long dendrites and short axons

Which one of the following is not a feature of motor neurons? a) They carry signals from the central nervous system to muscles, organs and glands b) They can both transmit and receive messages c) They have no dendrites d) They control physical movements

True or False? Motor neurons have long dendrites and long axons.

Relay neurons connect _ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ _ neurons to _ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ _ neurons.

Which one of the following is not a feature of relay neurons? a) They are located in the peripheral nervous system b) They can transmit and receive messages c) They have short axons and short dendrites d) They carry signals across the central nervous system

Which one of the following is not part of a synapse? a) The postsynaptic membrane b) The presynaptic knob c) The synaptic cleft d) The myelin sheath

What is an action potential?

True or False? During synaptic transmission, the neurotransmitters diffuse across the synaptic cleft and temporarily bind with receptor sites on the presynaptic membrane.

True or False? After synaptic transmission, any remaining neurotransmitter molecules are destroyed by enzymes or recycled.

Neurotransmitters are either _ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ _ or _ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ _.

Dopamine receptors play an essential role in: a) mood regulation b) movement and reward c) memory and learning

True or False? Excitatory neurotransmitters are those that inhibit an action potential in the postsynaptic neuron.

Which of the following is not an excitatory neurotransmitter? a) Serotonin b) Glutamate c) Adrenaline

True or False? Inhibitory neurotransmitters increase the neuron’s negative charge.

True or False? Serotonin is an inhibitory neurotransmitter.