Which of the following hormones require iodine?
Thyroxin
Aldosterone
Parathyroid hormone
Insulin
The blood glucose levels are decreased by:
insulin
thyroxin
aldosterone
cortisol
Which body system coordinates activities of body parts by releasing hormones into the blood?
Nervous system
Digestive system
Circulatory system
Endocrine system
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
Humans have how many pairs of cranial nerves ?
4
12
16
21
Which of the following is NOT an endocrine gland?
Pancreas
Salivary glands
Thyroid gland
Pituitary gland
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
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.
