Biology
Assertion. Lacrimal gland is a kind of endocrine gland which secretes an enzyme called thrombokinase.
Reason. Lacrimal gland is located in the upper outer portion of the orbit of the eye. Tears act as a lubricant and also have antiseptic property.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Answer
A is False and R is True.
Explanation
The lacrimal gland is an exocrine gland located above the eyeball. It secretes lacrimal fluid (tear fluid), a watery fluid isotonic to plasma, onto the surface of the eyeball. These tears help clean, lubricate, nourish, and maintain eye health.
Related Questions
Assertion. The sympathetic nervous system is stimulated by the hormone thyroxine which is secreted by the thyroid gland.
Reason. Sympathetic nervous system prepares the body for violent action against abnormal conditions. Adrenaline is termed as emergency hormone.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. Reflexes are involuntary but all involuntary actions are not reflexes.
Reason. Reflexes and involuntary actions of our body are controlled by medulla oblongata and spinal cord respectively.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. Choroid layer provides nourishment to the eye and also prevents light rays form reflecting and scattering inside the eye.
Reason. Choroid layer is the outermost layer of the eyeball which surrounds the sclerotic layer. This layer contains two types of pigments-Rhodopsin and Iodopsin.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Assertion. The image formed on the retina is straight and real.
Reason. Images from the retina are transmitted to the brain through the optic nerve. Then brain interprets it in an upright position. Both the eyes form two images but the brain interprets them as one due to the overlapping of the images.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.