Last Unit

Question 1

3 different regions? Urinary system.

Answer 1

Cortex- outermost layer

medulla- inner layer

pelvis-hollow chamber entrance for blood vessels + utter

Question 2

The kidneys

Answer 2

Attached to dorsal abdomen

Question 3

Dynamic process

Answer 3

• Constant conditions present fewer variables for the body to deal with
• nesscary for constant enzyme function

Question 4

Homeostasis → dynamic process regulates

Answer 4

, Temp,blood glucoses,blood pH, blood pressure

Question 5

Role of excretion

Answer 5

1. The elimination of metabolic waste from our body
2. Homeostatic regulation of chemical concentrations

Question 6

Control systems balance

Answer 6

-Balance inputs and outputs
-shut off mechanism
- can’t have consistency

Question 7

Where is urea produced?

Answer 7

• The liver
• excreted from body through kidneys and sweat glands

Question 8

Organs of excretion

Answer 8

-Kidney
-lungs
-Skin
- liver

Question 9

+ve and -ve feedback mechanisms

Answer 9

Neg = most common, reduces stim that it effects

Posit= less common, enhances stim

Question 10

The nephron is located in.?

Answer 10

The kidney

Question 11

1. Glamorous

Answer 11

• Cappliers supplying blood to the nephron

Question 12

2. Cup like structure) that encloses glamours

Answer 12

The bowman’s capsule

Question 13

(3) Attached to the bowman’s capsule)
-Highly coiled tube

Answer 13

Proximal tubule (3)

Question 14

Loop of henle -(attached to proximal tubule)

Answer 14

Large u shaped tube
- extends to medulla region of the kidney

Question 15

Coiled tube, downstream of Henle

Answer 15

(5) distal tubule

Question 16

Collecting tubule

Answer 16

• Several nephrons
• carry urine out of kidney toward ureter

Question 17

Pressure sends water & solutes into the bowman’s capsule

• solution: nephric filtrate

-blood & proteins are big to be in cappileres

Answer 17

Glomerous/Bowman’s capsule

Question 18

-filtrate flows through
-useful réabsorption —> intoblood by diffusion and active transport

Answer 18

2. Proximal tubu

Question 19

3. Loop of Henle

Answer 19

Na+ ions réabsorba into medulla

-longer the loop the more Na+ absorbed

Question 20

Fine tuning of blood concentrations

-réabsorption (nephron to blood
-tubular secretion (blood to nephron)

Answer 20

4. Distal Tubule

Question 21

5. COllecting tubule

Answer 21

• urine is in nephron
• urine must pass through the kidney
  -Water is rebsorbed
  -concentrated urine exits kidney

Question 22

Summary of the Nephron

Answer 22

-not a filter
Réabsorption and secretion occur by active transport,so contractions of blood can be maintained: homeostasis

1. Filteration
2. Réabsorption
3. Sécrétion

Question 23

Endocrine control
(Produced in gland and secreted in blood)

Answer 23

1. ADH (Antidiuretic Hormone)
   -produced in pituitary gland
   -réabsorption in the collecting tubules
2. Aldosterone
   -produced in adrenal glands
   -stimulates réabsorption of Na+ and Cl- out distal tubule
3. PTH
   - produced in parathyroid glands
   -stimulates the real option of Ca 2+

Question 24

The Endocrine gland:

Answer 24

Organ that produces & secretes hormones

Question 25

Target fell/ organ (endocrine system):

Answer 25

Specific site that is affected by the hormone

Question 26

Mechanism of hormone action

Answer 26

1. Stimulated, endocrine gland releases hormones (into blood) 2. Hormone travel through blood to target cells 3. Hormones interact with receptors on cells surface 4. Stim cell to do specific activity