Science (English Medium) इयत्ता ११ - CBSE Question Bank Solutions for Biology

Read the following statements and choose the correct option

Statement 1: Atria receive blood from all parts of the body which subsequently flows to ventricles.

Statement 2: Action potential generated at sino-atrial node passes from atria to ventricles.

Define the following terms and give their location?

Purkinje fibre

The walls of ventricles are much thicker than atria. Explain.

Write the features that distinguish between the two.

Open and Closed circulatory system

Write the features that distinguish between the two.

Sino-atrial node and Atrio-ventricular node

Answer the following:

Which part of heart is responsible for initating and maintaining its rhythmic activity?

Answer the following:

What is specific in the heart of crocodiles among reptilians?

In the diagrammatic presentation of heart given below, mark and label, SAN, AVN, AV bundles, bundle of His and Purkinje fibres.

Differentiate Glycosuria from Ketonuria.

Mention any two metabolic disorders, which can be diagnosed by analysis of urine.

Explain briefly, micturition and disorders of the excretory system.

Ribs are attached to ______.

Intervertebral disc is found in the vertebral column of ______.

Which one of the following is showing the correct sequential order of vertebrae in the vertebral column of human beings?

Which one of the following statements is true?

The three tiny bones present in middle ear are called ear ossicles. Write them in correct sequence begining from ear drum.

What is the difference between the matrix of bones and cartilage?

Our fore arm is made of three different bones. Comment.

With respect to rib cage, explain the following:

Bicephalic ribs

With respect to rib cage, explain the following:

True ribs