Question

which of the following is a part of the central nervous system? a) the brain b) the somatic nerves c) the sympathetic nerves d) the parasympathetic nerves the majority of neurons in the brain are a) receptor neurons b) motor (efferent) neurons c) sensory (afferent) neurons d) interneurons (association neurons)

Explanation:

The central nervous system consists of the brain and spinal cord. Receptor neurons are mainly for detecting stimuli, motor neurons carry signals to muscles and glands, sensory neurons transmit information from sensory organs to the CNS, and interneurons are the most abundant in the brain, connecting other neurons.

Answer:

1. a) The brain
2. d) interneurons (association neurons)