0
When the sympathetic in the neck is cut, the pupil becomes considerably contracted. Hence, it has been argued that the nerves supplying the dilator are derived from the sympathetic.
These fibres are supposed to take origin in the gray matter of the cervical spinal cord. The sympathetic also supplies the walls of the vessels, and thus controls the amount of blood going to the iris and this contraction of the pupil has been explained as due to vascular engorgement. It is argued that though the vasomotor mechanisms may cooperate in dilatation, they cannot be its only cause, as the widening of the pupil may occur in a bloodless eye. Since the other tissues are elastic and antagonize the sphincter, paralysis of that muscle would give rise to dilatation even in anaemic mydriasis.
What else can I help you with?
What is the superlative from from nervous?
The superlative form of "nervous" is "most nervous."
What are the comparative and superlative forms of nervous?
Comparative: more nervous Superlative: most nervous
Does the nervous system make your nervous?
it means that you get nervous
How do you spell nervous?
That is the correct spelling of the adjective "nervous" (worried, concerned, or jittery).nervous
Does the central nervous system consist of the somatic nervous system?
No. Nervous System is comprised of the Central Nervous System (CNS) and the Peripheral Nervous System (PNS) The PNS is comprised of the Somatic Nervous System and the Autonomic Nervous System The Autonomic Nervous System is comprised of the Sympathetic Nervous System, the Parasympathetic Nervous System and the Enteric Nervous System
What organ system does the brain belong too?
The nervous system The central nervous system
What comprises the nervous system?
The Sympathetic Nervous System and the Parasympathetic Nervous System
What is the comparative form of nervous?
The comparative form of "nervous" is "more nervous."
What is the past tenses of nervous?
"Nervous" is an adjective, it doesn't have a past tense. It is only verbs that have a past tense.
The cranial and spinal nerves form what nervous system?
the peripheral nervous system
What kind of nervous are in the upward tract?
what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract? what kind of nervous are in the upward tract?
Why do you get nervous?
You have nervous system
