Question

1. The direct transfer of heat energy from one object to another through physical contact is called

A) radiation.

B) conduction.

C) convection.

D) evaporation.

2. The majority of water is reabsorbed by osmosis in the
A) PCT

B) LOOP OF HENLE

C) DCT

D) COLLECTING DUCT

3. Brush border enzyme secreted in the small intestine is
A) PEPSIN

B) TRYPSIN

C) CARBOXYPEPTIDASE

D) ENTEROKINASE

Answer 1

Answer

1. Option B) Conduction

• The heated object comes in direct contact of another object in order to transfer the heat.
• Example : Holding an ice cube
  - Due to heat in body, the ice melts as the heat is tranferred by conduction.

2. Option A) PCT

• Proximal convoluted tubule reabsorbs about 65% of water from the filtrate.
• As it is also the site for sodium reabsorption, increased concentration of interstitial space results in osmosis of water.

3. Option D) Enterokinase

• Brush border formed by microvilli of duodenum releases enterokinase (enteropeptidase).
• It converts inactive trypsinogen into active trypsin.
• Trypsin is the enzyme that digests protein molecules into smaller peptides.