Download App

PART - 2 - Unit V : CH - 15 Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYPART - 2 - Unit V : CH - 15 Body Fluids and Circulation3 Marks
Question
What is the heartbeat? Write four differences between Neurogenic Heart and Myogenic Heart.
✓

Answer

Heartbeat : The rhythmic and sequential contraction and relaxation of the heart to collect and pump blood back to the body after circulation is called a heartbeat.
Differences between Neurogenic Heart and Myogenic Heart
S.No.Neurogenic HeartMyogenic Heart
1. The heartbeat is initiated by ganglia located near the heart. Heartbeat is initiated by specialized muscle fibers of the heart.
2. Contraction stimulus originates from the nervous system. The contraction stimulus originates within the heart itself.
3. The heart ceases beating immediately after removal from the body; hence, heart transplantation is not feasible. The heart continues to beat for some time even after removal from the body, making heart transplantation possible.
4. Examples include some annelids and many arthropods' hearts. Examples include mollusks and earthworms' hearts.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from PART - 2 - Unit V : CH - 15 Body Fluids and Circulation→PART - 2 - Unit V : CH - 15 Body Fluids and Circulation — all question types→BIOLOGY STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Explain the guidelines/ principles for nomenclature.
→
How is glomerular filtrate hypertonic and hypotonic in descending and ascending limb of loop of Henle, respectively. What is the effect of ADH on collecting tubules?
→
Explain blood pressure and pulse.
→
Describe the main excretory organs found in invertebrate animals.
→
Sumit, student of class XI when returned from school was told by his mother that his grandfather was complaining about some uneasiness. Sumit told his mother to take him to the doctor. The doctor tied a cuff around his arm and pumped air, then he slowly released the air. The handcuff was connected to a tube containing mercury. Doctor told Sumit that his grandfather is suffering from high blood pressure and put him on medication. The doctor also advised him to take precautions and rest and asked Sumit's mother to bring him for regular checkups.
  1. What is meant by blood pressure?
  2. What is the harmful effect of blood pressure on health?
  3. Enumerate the range of normal and high blood pressure in human.
  4. What values are displayed by Sumit as a good grandson?
→
Arun visited his village in vacations to see his grandfather. He went to the field one day along with his grandfather where he observed the poor growth of the sugarcane. He discussed the issue and the reason behind this with his grandfather. Sugarcane is the main crop in their village. His grandfather asked him to suggest some methods in order to increase the yield of sugarcane, in a healthy way. Being a biology student Arun told his grandfather to use gibberellins ($\mathrm{GA}_3$) spray on the sugarcane crop.
  1. What are gibberellins?
  2. What are other physiological responses influenced by gibberellins? Give arty two.
  3. What message is conveyed by grandfather and Arun's character?
→
Explain the mechanism of urine formation.
→
Answer briefly: Why are villi present in the intestine and not in the stomach?
→
What is excretion? Write any four differences between ammonia and uric acid excretion.
→
Make a list of some proteins and their functions.
→