Home
Class 12
BIOLOGY
Assertion: Saliva is a secretion of sali...

Assertion: Saliva is a secretion of salivary gland.
Reason: Saliva is a mixture of water and electrolytes, derived from blood plasma.

A

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

B

Both Assertion and Reason are true but, Reason is not the correct explanation of Assertion.

C

Assertion is true, but reason is false

D

Assertion is false, but Reason is true

Text Solution

Verified by Experts

The correct Answer is:
B
Saliva is a secretion of salivary glands, which is slightly acidic (pH-68). About 1-1.5 liter of saliva is secreted per day. Saliva is a mixture of water and electrolytes such as `Na^(=), K^(+), HCO_(3)^(-), Cl^(-)`, derived from blood plasma.
Promotional Banner

Topper's Solved these Questions

  • DIGESTION AND ABSORPTION

    ARIHANT NEET|Exercise Chapter Exercise Medical entrance s gallery|87 Videos

  • DIGESTION AND ABSORPTION

    ARIHANT NEET|Exercise Chapter Exercise Medical Entrance special format questions (Statement based questions)|21 Videos

  • CHROMOSOMAL BASIS OF INHERITANCE

    ARIHANT NEET|Exercise Chapter Exercise Medical entrances gallery (Collection of questions Asked in NEET and Various medical Entrance Exams)|76 Videos

  • ECOSYSTEM

    ARIHANT NEET|Exercise Exercises C Medical entrances gallery (collection of questions Asked in NEET & Various Medical Entrance Exams)|77 Videos

Similar Questions

Explore conceptually related problems

Assertion: Oxynic cells are minor salivary glands. Reason: Oxyntic cells stain strongly with eosin.

Assertion :- Pancreas is purely endocrine gland. Reason:- It is totally endocrine and secretes only hormones

Assertion : Birds have no mammary gland. Reason : Pigeonds secrets 'pigeon's millk'

Read the assertion and reason carefully to mark the correct option out of the options given below: (a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion (c) If the assertion is true but the reason is false (d) If both the assertion and reason are false (e) If the assertion is false but reason is true Assertion : Saline water in not given to patients of hypertension. Reason : Saline water can cause vomiting and may drop blood pressure suddenly causing cardiac arrest.

Assertion : Pituitary gland is also called master gland. Reason : It secretes a number of trophic hormones which regulate secretion from other endocrine glands.

Assertion: The sight, smell and presence of food in the oral cavity can stimulate secretion of saliva. Reason: The activities of the gastro-intestinal tract are only under neutral control for proper coordination of different parts.

Assertion: The presence of water molecules makes separation of ions easier in electrolyte. Reason: The presence of water molecules in electrolyte decreases the resistance of electrolyte.

Assertion :- Pancrease is heterocrine gland. Reason:- Pancrease secretes both protein & steroid hormones.