Chapter 10 - Excretion

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Osmoregulation

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21 Terms

1

Osmoregulation

Process which controls the water and mineral salts in the blood.

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2

Sphincter muscles

muscles at the base of the urinary bladder that control the flow of urine into the urethra.

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3

larger volume of dilute

Less water is reabsorbed resulting in a(n) ________ urine.

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4

small molecules

In dialysis, blood is passed over a dialysis membrane of a large surface area which is permeable to ________ but does not allow proteins to pass through.

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5

C

(________) The urinary bladder is an elastic and muscular organ that collects and stores urine excreted by the kidneys.

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6

Ultrafiltration

Process that occurs in the glomerulus.

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7

kidneys

The organ which functions to remove waste products, excess water and excess mineral salts.

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8

osmoreceptor cells

The hypothalamus contains ________ that can monitor the water potential of blood.

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9

Excretion

the process by which the body removes metabolic waste products and toxic materials.

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10

Excess salts

________, nitrogenous waste products, excess water and processed drugs and poisons from the liver enter the renal pelvis as urine.

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11

Excess mineral salts

________, nitrogenous wastes and excess water are excreted through the kidneys through ultrafiltration and selective reabsorption of useful materials.

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12

antidiuretic hormone

The hormone which controls the amount of water in blood, released by the pituitary gland.

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13

Catabolic processes

________ are ‘ breaking- down processes where larger molecules are broken down to form smaller molecules.

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14

waste products of metabolism

The ________ are excreted by the following organs:

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15

Excessive gain

________ in water due to drinking or excessive loss due to diarrhoea or sweating will result in a change in the water potential of blood.

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16

Metabolic processes

processes which consist of anabolic processes and catabolic processes.

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17

Excess water

________ could also lead to an increase in blood pressure due to an increase in volume.

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18

Ureters

narrow tubes that emerge from a depression in the concave surface of the kidney called a hilum.

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19

Urinary bladder

an elastic and muscular organ that collects and stores urine excreted by the kidneys.

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20

Urethra

a duct that connects the urinary bladder to the outside of the body. Urine passes through this tube to the outside.

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21

Dialysis machine

The machine which would have to perform the functions of a kidney.

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