SBI4U Exam Review

Urine formation depends on the following functions.

• Filtration

• Reabsorbtion

• Secretion

• Excretion

• All of these are required

Tags

NGSS.HS-LS1-3

T/F - The glomerulus can be considered a high-pressure filter.

• True

• False

Solutes and water move from the nephron back into the blood

• Filtration

• Reabsorbtion

• Secretion

• Excretion

Tags

NGSS.HS-LS2-3

Reabsorbtion of water and solutes in the kidney is regulated by ___________________

• hormonal signals

• the nervous system

• urine feedback signals

Tags

NGSS.HS-LS1-3

T/F - The rate of diffusion depends on the concentration difference, or concentration gradient, that exists between two areas or across a membrane. The larger the gradient,

the faster the rate of diffusion is.

• True

• False

________________________________ means that some molecules can diffuse very rapidly across a membrane while other molecules are unable to transit the membrane without assistance.

• Selectively permeable

• Selectively permanent

• Selectively permethrin

• Selectively permeonable

Two major factors, _________ and __________, determine the

ease with which a molecule or ion can move across a membrane.

• size and shape

• size and charge

• shape and charge

Channel proteins form _______________________ pathways in the membrane through which water and certain ions can pass

• hydrophilic

• hydrophobic

The property of a solution that has a lower solute concentration than another solution

• hypotonic

• hypertonic

• isotonic

_______________ moves aggregate molecules into the cell.

• Endocytosis

• Exocytosis