The nervous system

Which division of the motor nervous system is voluntary?

• Autonomic

• Parasympathetic

• Somatic

• Sympathetic

Most vertebrate neurones are:

• Bipolar

• Multipolar

• Sensory

• Unipolar

Which of the following structures may be absent from a vertebrate neurone?

• Axon

• Dendrite

• Myelin sheath

• Cell body

Which of these statements about neurones is FALSE?

• They're capable of replication

• They're excitable

• They're highly differentiated

• They're long-lived

Which of the following are NOT involved in the establishment of a resting membrane potential?

• Gated channels

• Leakage channels

• Potassium ions

• Sodium pump

What is a typical resting membrane potential for a neurone?

• -90 mV

• -70 mV

• -55 mV

• +30 mV

Which channels are NOT involved in graded potentials?

• Chemically-gated

• Light-gated

• Mechanically-gated

• Voltage-gated

An action potential is caused by inflow of which ions?

• Calcium ions

• Chloride ions

• Potassium ions

• Sodium ions

Which of the following is NOT a property of chemical synapses?

• Delay at the synapse

• Neurotransmitters in pre-synaptic vesicles

• Receptors on post-synaptic membrane

• Two-way communication

Neurotransmitters can be excitatory or inhibitory.

• TRUE

• FALSE