Chapter 29

_____________ relay messages from the brain and spinal cord to muscles and glands. a. Motor neurons b. Sensory neurons c. Interneurons d. Neuroglia

When a neuron is at rest ________________. a. it is at threshold potential b. gated sodium channels are open c. the sodium-potassium pump is operating d. both a and c

Action potentials occur when ____________. a. a neuron receives adequate stimulation b. sodium gates open in an ever accelerating way c. sodium-potassium pumps kick into action d. both a and b

Neurotransmitters are released by _______________. a. axon endings b. the cell body c. dendrites d. myelin sheaths

You would find the axons of interneurons ____________. a. in the brain b. in the spinal cord c. in autonomic nerves d. both a and b

Skeletal muscles are controlled by ______________. a. sympathetic nerves b. parasympathetic nerves c. somatic nerves d. both a and b

When you sit quietly on the couch reading, output from the ___________ system prevails. a. sympathetic b. parasympathetic c. both d. neither

Compared to lower vertebrates, mammals have a relatively small _______________. a. forebrain b. midbrain c. hindbrain d. both a and c

The cerebrum is part of the ______________. a. forebrain b. midbrain c. hindbrain d. brain stem

Learning new facts involves the ______________. a. cerebellum b. amygdala c. primary motor cortex d. brain stem

Match each item with its description. __________ muscle spindle __________ neurotransmitter __________ limbic system __________ brain stem __________ cerebral cortex __________ neural tube __________ blood-brain barrier a. embryonic structure b. controls basic reflexes c. protects brain and spinal cord from some toxins d. signaling chemical e. stretch-sensitive receptor f. roles in emotion, memory g. governs higher thought