chapter 26 urinary system

Question 1

how is blood pressure and volume regulated in the kidney?

Answer 1

adjusting the volume of water lost in the urine, releasing erythopoietin, releasing renin

Question 2

what are the three jobs of the nephrons?

Answer 2

filtration, reabsorption, secretion

Question 3

what is the renal capsule?

Answer 3

the filtration station of the nephron

Question 4

what are the two parts of the renal capsule?

Answer 4

glomeruius and bowmans capsule

Question 5

where does re absorption take place?

Answer 5

the renal tubules

Question 6

what are the three parts of the renal tubule?

Answer 6

proximal convulted tubule, loop of henle, distal convoluted tubule

Question 7

where does secretion take place?

Answer 7

the renal tubules

Question 8

what are nephrons?

Answer 8

the functional unit of the kidney

Question 9

what is the renal cortex?

Answer 9

outer layer of the kidney

Question 10

what is the renal medulla?

Answer 10

internal to the cortex and contain 6-18 distinct triangular structures called renal pyramids

Question 11

what is a renal lobe?

Answer 11

contains a renal pyramid, overlying area of renal cortex and adjacent tissues of the renal columns

Question 12

what is the external urethral orifice?

Answer 12

external urethral opening situated near the anterior wall of the vagina

Question 13

what is the external urethral sphincter?

Answer 13

a circular band of skeletal muscle

Question 14

what is micturition?

Answer 14

the act of peeing

Question 15

what do afferent fibers do?

Answer 15

in the pelvic nerves and carry the impulses generated to the sacral spinal cord.

Question 16

what do afferent fibers increased level of activity do?

Answer 16

facilitate parasympathetic motor neurons in the sacral spinal cord, stimulates contraction of the urinary bladder, stimulates interneurons that relay sensations to the cerebral cortex

Question 17

when do we get the first urge to pee?

Answer 17

when our bladder contains approximately 200 ml of urine