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What happens when The radial muscles of the iris contract?
When the eye is stimulated by bright light, the circular muscle of the iris contracts, decreasing the size of the pupil.
What happens to joe ribs when he exhales?
when exhalation takes place, then- 1.there are downward and inward movements of ribs with the contraction of internal intercostal muscles i.e.the muscles which connect with externally. diaphragm also returns to its dome structure , with the relaxation of its radial and circular muscles.
What are some examples of circular muscles?
There are some radial muscles that exist in the eye. Radial muscles have a similar structure to that of spokes on a bike, radiating outward from their source. The extraocular muscles of the eyes connect to the eye in several different locations around it to allow movement in different directions according to which extraocular muscle contracts.
When the radial muscles of the iris contract, what effect does this have on the size of the pupil?
When the radial muscles of the iris contract, the pupil dilates or becomes larger.
What is the circular device in a typewriter with radial spokes?
daisy wheel
What is the difference between radial and tangential acceleration?
Radial acceleration is the acceleration towards the center of a circular path, while tangential acceleration is the acceleration along the direction of motion in a circular path.
What is the part in pupil reflex of the coordinator?
Depending on the intensity of surrounding light, the iris makes an "automatic" adjustment to ensure that the retina receives the correct amount of light. This is another example of a protective reflex; too much light could damage the eye or give an excessively bright image, and too little light would result in an indistinct image. The iris is a circular disc containing the pigment melanin, which prevents light from passing through, in the middle of which is a hole called the pupil. It contains 2 sorts of muscles: Radial muscles are attached to the eye at the outside edge of the iris, radiating out like spokes of a wheel. Circular muscles act like a series of rings around the pupil. These 2 types of muscles are antagonistic, i.e. only one works at any one time: Contraction of the radial muscles opens the pupil, allowing more light through, and contraction of the circular muscles closes the pupil, allowing less light through.
What is the difference between radial and centripetal acceleration?
Radial acceleration is the acceleration towards the center of a circular path, while centripetal acceleration is the acceleration required to keep an object moving in a circular path.
WHAT Nerve supplies the triceps brachii muscles and the extensor digitorum longus?
radial nerve !
What nerves control the extensors muscles?
The Radial Nerve.
Is the biceps muscles attached to the ulna?
radial tuberosity
If a satellite's radial velocity is zero at all times its orbit must be elliptical or parabolic?
Not necessarily. A circular orbit around a central body, such as a planet, would also have a radial velocity of zero at all times. In a circular orbit, the satellite's velocity vector is always perpendicular to the radius vector, resulting in a constant radial velocity of zero.
