Pharmacology
Main neurotransmitter of the parasympathetic system
a)Norepinephrine
b)Dopamine
c)Dopamine
d)Acetylcholine
d)Acetylcholine
From which germ layer does the nervous system originate?
a)Mesodermo
b)endodermo
c)Ectodermo
d)Cresta neural
c)Ectodermo
Typical cardiovascular effect of atropine
a)Bradycardia
b)Hypotension
c)Tachycardia
d)Ventricular arrhythmia
c)Tachycardia
Which structure derives from the intermediate mesoderm?
a) Lungs
b) Kidneys
c) Epidermis
d) Liver
b) Kidneys
Main drug for glaucoma
a)Beta blockers
b)Prostaglandins
c)Atropine
d)Antimuscarinics
b)Prostaglandins
What is the consequence of the failure of the posterior neuropore to close?
a)Anencephaly
b)Spina bifida
c)Microcephaly
d)Holoprosencephaly
b)Spina bifida
What type of antagonism does atropine exhibit?
a) Non-competitive
b) Reversibly competitive
c) Irreversibly competitive
d) Allosteric
b) Reversibly competitive
The neural crest contributes to the formation of:
a) Cerebral cortex
b) Spinal cord
c) Sensory ganglia
d) Somites
c) Sensory ganglia
In myasthenia gravis, what is the mechanism by which acetylcholinesterase inhibitors improve muscle strength?
a) Increases presynaptic release of acetylcholine
b) Increases the sensitivity of nicotinic receptors
c) Decreases the degradation of acetylcholine at the neuromuscular junction
d) Blocks peripheral muscarinic receptors
c) Decreases the degradation of acetylcholine at the neuromuscular junction
Which cardiac structure is primarily derived from the second cardiac field?
a) Right atrium
b) Left ventricle
c) Outflow tract
d) Sinus venosus
c) Outflow tract