Question

Which of the following blood cell types is paired with its correct function?

	a.	red blood cells (erythrocytes) / transporting oxygen from the lungs to body tissues
	b.	white blood cells (leukocytes) / defending against foreign pathogens
	c.	platelets (thrombocytes) / assisting in blood clotting
	d.	all of these blood cell types are paired with their correct function

Which of the following is the most common human blood type?

	a.	type O blood
	b.	type A blood
	c.	type B blood
	d.	type AB blood

1. Which of the following is a function of the pericardium?

   	a.	it provides an enclosure within which the heart can expand and contract
   	b.	it provides a slippery inner lining which minimizes friction when the heart beats
   	c.	it provides protection for the heart
   	d.	all of these are functions of the pericardium

   Contraction of the _____ fills the right ventricle of the heart.

   	a.	superior vena cava
   	b.	right atrium
   	c.	pulmonary artery
   	d.	left atrium

   Which of the following statements about blood vesselsis false?

   	a.	arteries convey blood away from the heart toward capillaries
   	b.	arteries branch into arterioles, which branch into capillaries
   	c.	arteries always convey oxygenated blood
   	d.	veins convey blood toward the heart from capillarie

   Which of the following chambers of the heart pumps blood to the lungs?

   	a.	the right atrium
   	b.	the right ventricle
   	c.	the left atrium
   	d.	the left ventricle

Answer 1

Answer

1. Option D) all of these blood cell types are paired with their correct function

• Red blood cells contain hemoglobin that transportd blood to the lungs and the body tissues.
• White blood cells attack foreign antigens and pathogens by destroying them and making antibodies against them.
• Platetes helps in inhibiting the blood loss by forming a clot.

2. Option A) Type O blood

• It contains both anti-A and anti-B antibodies.
• There are no antigens present on red blood cells.
• It is also called universal donor.

3. Option D) All of these are functions of the pericardium

• Heart lies in pericardial cavity.
• The paricardium lubricates the surface to reduce friction when heart pumps.
• It enables easy movement of the heart within the cavity. It protects heart against trauma.

4. Contraction of the right atrium fills the right ventricle of the heart.

• Right atrium contracts to push the blood into right ventricle via tricuspid valve.
• This blood is deoxygenated.

Option B) Right atrium

5. Option C) Arteries always convey oxygenated blood

• Pulmonary arteries carry deoxygenated blood towards the lungs.
• Hence, not all arteries convey oxygenated blood.

6. Option B) The right ventricle

• During ventricular contraction, the blood from right ventricle is pumped into the lungs via pulmonary trunk and pulmonary arteries.