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What acts as a reflexively activated diaphragm to vary pupil size?
Wiki User
∙ 11y ago
The Iris.
Wiki User
∙ 11y ago
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How does the plasma membrane of the cell compare with the membrane in the U-shape?
Angiotensin is activated by a renal enzyme called
Selection acts directly on?
Selection acts directly on phenotypes.
What is the name of the muscular sling that supports the pelvic viscera?
The floor of the pelvis is formed by the pelvic diaphragm.This diaphragm is formed by two layers of fascia with a middle layer of skeletal muscle.The muscles forming the middle layer are the levator ani and coccygeus muscles.The levator ani acts as a muscular sling for the rectum and marks the boundary between the rectum and the anal canal.Dr Rafi Hamidi
Does Lorenzo's Oil acts at the endoplasmic reticulum or the peroxisome?
It acts at the peroxisome of a cell
The is the colored part of the eye that narrows and widens to control the amount of light entering the eye?
The colored portion that regulates the amount of light in eye is called as iris. The hole through which light passes inside the posterior chamber is called as is called as pupil. The color of the iris changes as per color of the skin pigment. It has got circular muscles and radial muscles in it. In fight or flight responce, it is dilated through sympathetic nerve stimulation. In relaxed and stress free envirinment pupil is constricted via parasympathetic nerve stimulation.
Does the dome shape muscle that acts to ventilate is the diaphragm?
Yes, it is.
An unpaired muscle that acts with the muscle to accomplish inspiration?
Inspiration is due to the contraction of the diaphragm and external intercostal muscles.
What 2 cavities does the diaphragm separate?
diaphragm is muscular part made up of involuntary smooth muscles.it is nothing but a thin rubber dome with a springy and flexible rim.any dividing structure is acts as a diaphragm and is called so.a number of structures acts so.in body ,THORACIC DIAPHRAGM; a tissue of muscle separating thoracic and abdomen.it also plays important role in respiration.UROGENITAL DIAPHRAGM;a layer of pelvis separating deep perineal sac from upper pelvis.PELVIC DIAPHRAGM;a pelvic muscle consisting of levator ani and coccygeus.even iris and eardrum acts as a diaphragm.even it is used in birth control.;inserted in vagina and fitted over cervix and is held in place by vaginal muscles,this diaphragm holds spermicide in place over cervix.it kills sperms and prevent fertilization.thus the diaphragm acts as a dividing structure in various parts and divides body in various parts.
Can a pupil help eyes to adjust when there is dim or bright light?
Not the pupil itself but the SIZE of it as controlled by the eye's Iris does this, it acts in a way similar to a camera's F stop iris.
What is the last step in the sequence of events when cyclic AMP acts as a second messenger?
the last step is ofcourse glycogen breakdown.......before that inactive glycogen phosphorylase-b is activated and phosphorylated to glycogen phosphorylase-a by the help of activated phosphorylase kinase........ ......phosphorylase kinase was activated by activated protien kinase..and activated protien kinase was activated by cyclic amp...........
What is a muscle that forces the lungs to expand and contract and bring air into and out of the lungs?
Lungs do not actively expand and contract by themselves. A muscle below the lungs called the diaphragm acts as a bellow, creating negative pressure within the abdominal cavity that holds the lungs to allow air to rush in and out the lungs.
Do release bearing acts directly upon a diaphragm spring?
Yes. (The technical terms for the parts are the throwout bearing and pressure plate)
Does a platypus has a diaphragm?
They do not have a diaphragm which is the characteristic feature of mammals exclusively in the animal kingdom. However, they do possess a structure known as Diaphragmaticus which acts as a piston during breathing process. It is however, not Homologous to diaphragm of mammals.
What is the part of the fish acts just like the diaphragm in the human respiratory system?
The gills act as the lungs intaking water and air and filtering back out again.
What muscles form the urogenital diaphragm?
The Pelvis and Perineum are divided by 2 diaphragms 1. pelvic diaphragm made up of levator ani muscles which are attached at perineal body this arrangement is just like diaphragm muscle which has a central tendon like perineal body and inferiorly the pelvic diaphragm is covered by colles facia. 2.the other diaphragm is urogenital diaphragm, its upper layer is formed by parietal pelvic fascia and inferior layer is formed connective tissue perineal membrane, between these two layers is called deep perineal pouch which contain deep transverse perineii muscle which is a skeletal muscle and it acts as sphincter urethrae.
What is wrong with a Chrysler Cirrus 1996 if a small red light on the upper right dash is blinking The car acts like it wants to start but won't?
Theft alarm has been activated. Try unlocking the doors with the key.Theft alarm has been activated. Try unlocking the doors with the key.
How does air tools work?
They have a turbine that acts as motor, and when air pressure turns it they rotate. Air nailers use air pressure on a diaphragm to fire a small shaft that does the action.
