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What part of the eye allows light to enter?
The cornea and the pupil are the parts of the eye that allow light to enter. The cornea acts as a protective outer layer that helps to focus light, while the pupil is the opening in the center of the iris that regulates the amount of light entering the eye.
How is the Nerve impulse responsible for the pupil becoming smaller?
Pupil is a window for the light to enter our eyes. When we are in a dim light a nerve impulse is generated to the brain to enlarge the pupil. Size of pupil is managed by the iris (coloured part of the eye). If excessive light is there, the pupil shrinks to a smaller size so that the eye's not damaged esp. the retina where the image of objects are formed
What lets light into the eye?
Light enters the eye through the cornea, which is the clear outer layer that acts as a protective barrier. The cornea then helps focus the light before it passes through the pupil, the opening in the center of the iris that controls the amount of light entering the eye.
When adenylate cyclase is activated?
"When adenylyl cyclase is activated, it catalyses the conversion of ATP to cyclic AMP, which leads to an increase in intracellular levels of cyclic AMP. Cyclic AMP functions as a "http://wiki.answers.com/../pathphys/endocrine/moaction/surface.html" to relay extracellular signals to intracellular effectors, particularly http://wiki.answers.com/pka.html. "
When is the repressor protein transcribed?
The repressor protein is transcribed when the gene coding for it is activated. This often occurs in response to specific signals or conditions in the cell. The repressor protein then acts to regulate the expression of other genes in the cell by binding to specific DNA sequences.
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.
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 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.
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 part of the eye allows light to enter?
The cornea and the pupil are the parts of the eye that allow light to enter. The cornea acts as a protective outer layer that helps to focus light, while the pupil is the opening in the center of the iris that regulates the amount of light entering the eye.
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 do the levator ani and coccygeus form?
The levator ani and coccygeus muscles together form the pelvic diaphragm. This muscular layer acts as a supportive structure for the pelvic organs and helps to maintain continence by providing sphincter-like function.
What is the first part of eye that reflects light?
The cornea is the first part of the eye that light encounters. It acts as a protective covering for the iris, pupil, and anterior chamber.
How is the Nerve impulse responsible for the pupil becoming smaller?
Pupil is a window for the light to enter our eyes. When we are in a dim light a nerve impulse is generated to the brain to enlarge the pupil. Size of pupil is managed by the iris (coloured part of the eye). If excessive light is there, the pupil shrinks to a smaller size so that the eye's not damaged esp. the retina where the image of objects are formed
