How does an axon conducts nerve impulses ?
Away from the cell body
Towards the cell body
Both towards and away from the cell body
Around, bypassing the cell body
Which part of the brain control the anterior pituitary gland secretions ?
Medulla
Thalamus
Cerebral cortex
Hypothalamus
An interneuron has :
long dendrites and a short axon.
long dendrites and a long axon.
short dendrites and a long axon.
short dendrites and a long or short axon.
The peripheral nervous system includes mixed nerves that:
serve the muscular and skeletal system.
serve the sympathetic system.
serve the parasympathetic system.
contain both sensory and motor fibers.
The enzyme that breaks down a neurotransmitter is the :
acetylcholine
serotonin
dopamine
acetylcholinesterase
Which of the following is NOT an endocrine gland?
Pancreas
Salivary glands
Thyroid gland
Pituitary gland
How is transmission across a synapse achieved ?
Ionic bonding
Diffusion of neurotransmitter across the cleft
Physical contact of axon to dendrite allowing the nerve impulse to continue onward
Diffusion of sodium ions across the cleft
How is transmission of nerve impulses across a synaptic cleft carried out in humans?
Sodium ions
Potassium ions
Neurotransmitter molecules
The nodes of Ranvier
Which of the following are the parts of neurons?
Brain, spinal cord, and vertebral column
Dendrite, axon, and cell body
Sensory and motor
Cortex, medulla and sheath
The peripheral nervous system includes the nerves, which are neurons with cell bodies that occur in the:
sympathetic nervous system
brain, spinal cord, or in ganglia
motor system
autonomic system
