There is a cascade that occurs when blood clots. Which is not a step in the blood clotting cascade?

Fibrin causes the conversion of thrombin to prothrombin.

What is the function of the sinoatrial node?

to send impulses to cause the contraction of the atrial walls

What is the function of peristalsis in the digestive tract?

churning food and moving it in one direction

What is the first step in the process of in vitro fertilisation (IVF)?

Drugs are administered to stop production of all reproductive hormones.

William Harvey demonstrated that blood flow is unidirectional. What else did he prove by his experiments?

The heart pumps blood into the arteries.

Melatonin affects the body by:

Increasing the likelihood of sleeping

studbud

IB DP Biology: Human physiology

9 termsStudBud Administration6,638 plays

Aligned to the IB Diploma Programme. Suitable for ages 16-19. Test your knowledge on Human Physiology. #IB #Biology #science

Flashcards9 cardsFPractice quizPHost liveL

Questions 9

Answers

1
There is a cascade that occurs when blood clots. Which is not a step in the blood clotting cascade?
Fibrin causes the conversion of thrombin to prothrombin.
Thrombin catalyses the conversion of fibrinogen to fibrin.
Platelets release clotting factors.
Clotting factors cause prothrombin to be converted to thrombin.
2
True or False? Capillaries have valves to prevent backflow of blood.
True
False
3
What is the function of the sinoatrial node?
to send impulses to cause the contraction of the atria and the ventricles
to cause the heart to relax
to send impulses to cause the contraction of the atrial walls
to send impulses to cause the contraction of the ventricle walls
4
What is the function of peristalsis in the digestive tract?
digesting food and moving it in two directions
churning food and allowing it to be absorbed in the small intestine
churning food and moving it in one direction
digesting food and moving it in one direction
5
What is the first step in the process of in vitro fertilisation (IVF)?
FSH and LH are administered in order to trigger superovulation.
Eggs are fertilised by the sperm in the lab.
Drugs are administered to stop production of all reproductive hormones.
Embryos are transferred back into the womb.
6
William Harvey demonstrated that blood flow is unidirectional. What else did he prove by his experiments?
The heart pumps blood into the arteries.
Oxygenated blood returns to the heart from the body.
Deoxygenated blood leaves the heart for the body.
The heart pumps blood into the veins.
7
Which organ secretes FSH (follicle-stimulating hormone)?
Ovary
Testis
Placenta
Pituitary gland
8
True or False? Emphysema is caused by a decrease in the available surface area for gas exchange in the lungs.
True
False
9
Melatonin affects the body by:
Increasing the likelihood of sleeping
Making the person feel more awake and alert
Increasing core body temperature
Increasing the heart rate

IB DP Biology: Human physiology Flashcards | StudBud