Next Structure and Components 3

Question 1

Compact bone is organized into structural units called:

Accepted Answer

Osteons (Haversian systems)

Answer

Osteons are the cylindrical structural units of compact bone, each containing a central Haversian canal.

Question 2

The tricuspid valve is located between which two heart chambers?

Accepted Answer

Right atrium and right ventricle

Answer

The tricuspid valve has three cusps and guards the right atrioventricular orifice.

Question 3

Which portion of the brain stem controls basic life functions such as heart rate and breathing?

Accepted Answer

Medulla oblongata

Answer

The medulla oblongata contains vital autonomic centers that regulate cardiovascular and respiratory functions.

Question 4

The large intestine absorbs primarily which substance from digestive contents?

Accepted Answer

Water and electrolytes

Answer

The main function of the large intestine is to reabsorb water and electrolytes, concentrating waste into feces.

Question 5

Which connective tissue structure connects muscle to bone?

Accepted Answer

Tendon

Answer

Tendons are dense regular connective tissue that transmit the contractile force of muscle to bone.

(Next) National Exit Test Practice Test