Nervous System Concept Check

Which of the following is NOT a function of the MOTOR division?

• Rest and Digest

• Controls voluntary movements

• Conducts signals to effectors

• Interpret signals

What do you call to the branches of the axon?

• Varicosities

• Axon hillocks

• Axon terminals

• Collaterals

Which potential can generate a long transmission or propagation of signals?

• Action

• Graded

• Resting

• Depolarized

Which of the following is TRUE about signal transmission?

• The onset of transmission starts with Na influx.

• Calcium is needed at the start of transmission.

• All disturbances in the membrane can trigger an action potential.

• A segment of an axon can still receive new signals once it repolarized.

TRUE OR FALSE.

Myelinated axons transmit faster signals.

• TRUE

• FALSE

TRUE OR FALSE.

The Glial cell that provides myelin sheath in CNS is the Schwann cell.

• TRUE

• FALSE

TRUE OR FALSE.

Neurons are negatively charged at their resting membrane potential.

• TRUE

• FALSE

TRUE OR FALSE.

Potassium has higher concentration outside the neurons.

• TRUE

• FALSE

TRUE OR FALSE.

To return the normal distribution of charges, the Na⁺/K⁺ pump allows Na⁺ to exit the membrane as K⁺ moves in.

• TRUE

• FALSE

a signal molecule that transmits nerve impulses across synapses

• neuron

• neurotransmitter

• nerve

• action potential