Chapter 24

The ____ of a neuron releases neurotransmitter. a. axon terminals b. cell body c. dendrites d. all of the above

_____ occur mainly in the brain and spinal cord. a. Sensory neurons b. Motor neurons c. Interneurons d. b and c

A(n) _____ has one axon and no dendrites. a. sensory neuron b. motor neuron c. interneuron d. neuroglial cell

When you sit quietly, output from the ____system prevails. a. sympathetic b. parasympathetic c. both d. neither

An action potential occurs when _____ . a. a neuron reaches threshold potential b. gated sodium channels close c. sodium-potassium pumps stop working d. gated potassium channels open

Skeletal muscles are controlled by the _____ system. a. sympathetic b. parasympathetic c. somatic d. both a and b

A ____ is an automatic response that does not require thought.

The two halves of the cerebrum _____ . a. have identical functions b. are part of the autonomic nervous system c. are connected by the corpus callosum d. consist mainly of motor neurons

The blood-brain barrier controls what enters ____. a. blood b. cerebrospinal fluid c. peripheral nervess d. both a and b

Which is a somatic sensation? a. hearing b. smell c. touch d. taste e. both a and \(c\) f. all of the above

______ is a reduced response to an ongoing stimulus. a. Propagation b. Perception c. Sensory adaptation d. Synaptic integration

Chemoreceptors play a role in the sense of ____. a. hearing b. smell c. vision d. pain

In a vertebrate eye, photoreceptors are in the _____. a. conjunctiva b. cornea c. lens d. retina

Color blindness arises when _____ are missing or defective. a. hair cells b. rod cells c. cone cells d. neuroglial cells

Match each structure with its function. ______rod cell ______cochlea ______cerebellum ______brain stem ______cerebral cortex ______taste bud ______myelin ______neurotransmitter ______ blood-brain ______barrier ______vomeronasal organ a. detects pheromones b. connects to spinal cord c. sorts out pressure waves d. protects brain and spinal cord from some toxins e. speeds signal transmission f. contains chemoreceptors g. secreted at synapse h. governs higher thought i. coordinates voluntary moves j. detects light