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
The PNS nerves are part of either the somatic system or the:
motor system
central nervous system
parasympathetic system
autonomic system
Which of the following hormones require iodine?
Thyroxin
Aldosterone
Parathyroid hormone
Insulin
Which of the following contains centers for heartbeat, breathing, and blood pressure?
Cerebellum
Cerebrum
Spinal cord
Medulla oblongata
How does a dendrite conducts nerve impulses ?
Around bypassing the cell body
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
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
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 enzyme that breaks down a neurotransmitter is the :
acetylcholine
serotonin
dopamine
acetylcholinesterase
The blood glucose levels are decreased by:
insulin
thyroxin
aldosterone
cortisol
