Biology
The given diagram represents a nephron and its blood supply. Study the diagram and answer the following questions:
(i) Label parts 1, 2, 3 and 4.
(ii) State the reason for the high hydrostatic pressure in the glomerulus.
(iii) Name the blood vessel which contains the least amount of urea in this diagram.
(iv) Name the two main stages of urine formation.
(v) Name the part of the nephron which lies in the renal medulla.
Answer
(i) The parts 1, 2, 3 and 4 are:
- 1 → Collecting duct.
- 2 → Distal convoluted tubule.
- 3 → Loop of Henle.
- 4 → Bowman's capsule.
(ii) The efferent arteriole is narrower than the afferent arteriole. This creates a high hydrostatic pressure in the glomerulus.
(iii) Efferent arteriole.
(iv) Two main stages of urine formation are:
- Ultrafiltration.
- Selective Reabsorption.
(v) Henle's loop and Collecting tubules
Related Questions
Given below is a diagram representing a stage during mitotic cell division. Study it carefully and answer the questions which follow:
(i) Is it a plant cell or an animal cell? Give a reason to support your answer.
(ii) Identify the stage shown.
(iii) Name the stage which follows the one shown here. How is that stage identified?
(iv) How will you differentiate between mitosis and meiosis on the basis of the chromosome number in the daughter cells?
(v) Draw a duplicated chromosome and label its parts.
(i) Name the disease for which the following types of vaccines are given:
- Salk's vaccine
- BCG
(ii) Give one example of each of the following:
- A water pollutant
- An aquatic plant used in the lab to demonstrate O2 liberation during photosynthesis
- An antibiotic
- A nitrogenous base in DNA
(iii) Expand the following biological abbreviations:
- ATP
- TSH
- DPT
- DNA
Briefly explain the following terms.
(i) Monohybrid cross
(ii) Biomedical waste
(iii) Innate immunity
(iv) Diapedesis
(v) Hormones
(i) State any two harmful effects of noise pollution on human health.
(ii) Categorize the following activities as per the functions of the Red Cross Society and the WHO:
- To suggest quarantine measures to prevent spread of disease.
- Humanitarian services to victim of war.
- To educate people in accident prevention.
- To promote projects for research on disease.
(iii) Write any two major reasons for the population explosion in India.
(iv) State Mendel's Law of segregation