Function of iris is to
- move lens forward and backward
- refract light rays
- bring about movements of eye lids
- alter the size of pupil.
The Correct Option is D
Solution and Explanation
Top Questions on neural control and coordination
Match List I with List II with respect in human eye.
List I
List II
A Fovea I Visible coloured portion of eye that regulates diameter of pupi B Iris II External layer of eye formed of dense connective tissue. C Blind spot III Point of greatest visual acuity or resolution D Sclera IV Point where optic nerve leaves the eyeball and photoreceptor cells are absent Choose the correct answer from the options given below:
- NEET (UG) - 2023
- Biology
- neural control and coordination
- A person has loss of control on emotions, which part of brain stop its function ?
- TS POLYCET - 2023
- Biology
- neural control and coordination
- Which part of the brain does not have its own source of ventricle?
- MHT CET - 2023
- Biology
- neural control and coordination
- Select the incorrect statement regarding synapses:
- NEET (UG) - 2022
- Biology
- neural control and coordination
- A person has loss of control on emotions. Which part of brain must have stopped functioning ?
- TS POLYCET - 2021
- Biology
- neural control and coordination
Questions Asked in NEET exam
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The potential (V) at any axial point, at 2 m distance(r) from the centre of the dipole of dipole moment vector \(\vec{P}\) of magnitude, 4 × 10-6 C m, is ± 9 × 103 V.
(Take \(\frac{1}{4\pi\epsilon_0}=9\times10^9\) SI units)
Reason R : \(V=±\frac{2P}{4\pi \epsilon_0r^2}\), where r is the distance of any axial point, situated at 2 m from the centre of the dipole.
In the light of the above statements, choose the correct answer from the options given below :- NEET (UG) - 2024
- Magnetic Field
- Given below are two statements:
Statement I: Mitochondria and chloroplasts both double membranes bound organelles.
Statement II: Inner membrane of mitochondria is relatively less permeable, as compared chloroplast. I
In the light of the above statements, choose the mis appropriate answer from the options given below- NEET (UG) - 2024
- Cell structure and organelles
- Match List I with List II:Choose the correct answer from the options given below:
List I
List II
A Mesozoic Era I Lower invertebrates B Proterozoic Era II Fish & Amphibia C Cenozoic Era III Birds & Reptiles D Paleozoic Era IV Mammals - NEET (UG) - 2024
- Origin Of Life
- A parallel plate capacitor is charged by connecting it to a battery through a resistor. If I is the current in the circuit, then in the gap between the plates :
- NEET (UG) - 2024
- Capacitors and Capacitance
- The terminal voltage of the battery, whose emf is\(10V\) and internal resistance \(1\), when connected through an external resistance of \(42\) as shown in the figure is:
- NEET (UG) - 2024
- Resistance and Resistivity
Concepts Used:
Neural Control and Coordination
Neural System:
Neurons are the most specialised cells in the nervous system of all animals, and they are responsible for detecting, accepting, and conveying numerous types of motives. The neurological system of low-spinal animals like Hydra is incredibly simple, consisting of a network of neurons. When the brain of an insect comprises a vast number of ganglia and neural tissues, it is optimally structured.
Coordination System:
Coordination is the process by which two or more organs work together to accomplish each other's duties. Increased muscle activity increases the supply of oxygen and the demand for energy while we exercise. When we cease exercising, our nerves, heart, lungs, and kidneys all return to normal. As a result, all of the organs' functions are properly integrated in order to conduct the exercise and supply the appropriate conditions while exercising. Similarly, in the human body, the neurological and endocrine systems work together to coordinate all of the organ activities.