Exam 27: Maintaining the Internal Environment

Filtrate passes through the proximal tubule of the nephron before the distal tubule.

All vertebrates other than mammals are ectothermic.

Which excretory organs are found in insects?

In flatworms,protonephridia branch throughout the body into bulblike _______________.

What type of animal uses Malpighian tubules for excretion?

Where does selective reabsorption of components of the glomerular filtrate occur?

The regulation of the body's osmotic composition is called __________________.

Mammals and birds can produce urine that is ____________,such that wastes are excreted in a small volume of water.

Which organ detects and responds to changes in blood glucose levels?

When blood sugar is low,______ from the pancreas stimulates the breakdown of _______ in the liver.

The _____________ is the functional unit of the kidney that performs the functions of filtration,reabsorption,and secretion.

Which simple excretory structure is present in the flatworm?

________________ is the filtrate left in the collecting duct to be expelled from the body after the kidney has reabsorbed needed nutrients and water.

What is the waste product of fish?

In a type of homeostatic control system called a ____________,a response that changes a condition back toward the set point causes the integrating center to stop directing effectors to produce that response.

Reptiles,birds,and insects excrete nitrogenous wastes in the form of

In the mammalian nephron,blood flows into a specialized capillary network called the ______________,and components of the blood plasma are filtered out.

When human body temperature gets too high,the hypothalamus responds by causing blood vessels to constrict.

Which of the following is not part of the normal glomerular filtrate?

The dynamic constancy of the internal environment of animals,in which conditions such as temperature,pH,and nutrient concentrations are kept within narrow limits,is termed