Neural Control and Coordination — BIOLOGY STD 11 Science — Question

Radha's father who is a diabetic patient does not avoid food items doctor has told him in diet. He also feels lazy to go for a walk. One day, his glucose level was checked by his doctor. The doctor advised him to take injections regularly, as he was not able to control his diabetes with diet and medication. He came home and while telling the things to Radha's mother, Radha (biology student) heard them and interrupted in between. She explained that, doctor has given insulin injections to control his blood glucose level. This may be discontinued, if he will take precautions in his daily routine.

1. Which endocrine gland and its part is involved in the secretion of inslin?
2. Why doctor preferred him to take insulin injections and what is the role of insulin in controlling level of glucose in blood?
3. What precaution he should take to protect himself from such disorder?
4. What are the values reflected from Radha's character as a biology student and a daughter?

Enlist the functions of polysaccharides.

Write any two energy yielding reactions of glycolysis.

Give a tabular representation of different constituents of a living cell.

Discuss “The respiratory pathway is an amphibolic pathway.”

Give reason for each of the following:

1. The vascular bundles of an isobilateral leaf are near similar in size, except that in the midrib.
2. Heart wood is dark brown in colour.
3. Cells of phellem/cork are impervious to water.
4. Quantity of secondary xylem produced is more than the quantity of secondary phloem during secondary growth.
5. Phellogen is a secondary meristem.

What do you understand by binomial system? Please clarify by example.

1. Differentiate between RER and SER.
2. Why are mitochondria called 'the power house' of the cell?

What are the main steps in aerobic respiration? Where does it take place?

How is an action potential achieved during impulse conduction through an axon? Explain.