Process of Absorbtion

Question 1

process of absorbtion

Answer 1

the diffusion of small, soluble, digested molecules into the blood stream.

Question 2

where does most absorbtion take place

Answer 2

iluem and few substances can be absored in the stomach

Question 3

what to the adaptations in the small intestine help with

Answer 3

increasing surface area

Question 4

state 4 adaptation of the small intestine

Answer 4

The internal surface of the small intestine is wrinkled with folds and twists

The folded surface is line with small finger-like projections called villi

Villi are covered with epithelial cells that have microscopic finger-like folds called microvilli

Each villus has a network of blood capillaries for the absorption of soluble food material

Question 5

explain passive absorption

Answer 5

this is when digested food molecules diffuse passively from a high to low concentration into blood capillaries of villi

Question 6

explain active absorption

Answer 6

only if necessary will food molecules be absorbed by active transport and transferred across the cell membrane of the villus, against diffusion gradient.

Question 7

What is the adaptation of the inner surface of the small intestine

Answer 7

The internal surface of the small intestine is wrinkled with folds and twists

Question 8

What is the folded surface lined with? (adaptation)

Answer 8

The folded surface is lined with small finger-like projections called villi

Question 9

What cells the villi covered with, and what do they have?

adaptation

Answer 9

Villi are covered with epithelial cells that have microscopic finger-like folds called microvilli

Question 10

What do each villus have and why

adaptation

Answer 10

Each villus has a network of blood capillaries for the absorption of soluble food material