SBMU Homeostasis Test (Chapters 9816) Menufy the choice that here completes the stareness or answers the question __ 1. Which of the following is an example of homeostasis? a. Mahetes frven __ are the most important systems for maintaining homeontasis? moncular and arrives and endocrine __ 3. Which task would not be considered nocessary for the survival of an organism? a taking in nutrients moving perponding to changes in the external covironment a systhesuring proteins, fat and carbohydrates 4. What is an environmental change that triggers a change in external or internal factors called? b. a sensor a an integrator 5. Why is an ectotherm likely to survive longer without food than an endotherm of equal size? a the octocherm has a higher metabolic rate b. the extocherm does not use energy to regulate its temperature the octocherm expends more enery than the endotherm a the ectocherm is better able to metabolize its stored energy 6. What part of the kidney is considered to be the functional unit? frenal modults nophroe glomerulus Howman's capsule __ 7. Which of these plands is not an endocrine gland? a. adrenal pland A pituitary gland thyroid gland sweat gland __ 1. Steroid hormones a. are derived from cholesterol. a are polar molecules. act on cell membran receptors ld are water soluble. __ 9.Which gland is the "master gland" a. parathyroid gland b. hype gland thyroid cland __ 10. Which hormone is not released by the anterior pituitary gland? cortisol h. protactin adrenocorticotropic bormone endorphins __ 11. Which bermone is called a "hatural painkiller" cortisol prolactin endorphins pic hormone __ 12. Where is insulin produced? là in the alpha cells in the islets of Lang lB in the exocrine cells in the pancreas Iin liver cells in the beta cells in the islets of Langerhans

1. **a. Maintaining a stable internal body temperature** (This is the definition of homeostasis - maintaining a stable internal environment despite external changes.)<br /><br />2. **b. Nervous and endocrine** (These two systems work together to monitor and regulate various bodily functions for homeostasis.)<br /><br />3. **b. Moving** (While movement is important for many organisms, it's not essential for the basic survival of *all* organisms. Consider plants or sessile animals.)<br /><br />4. **d. a stimulus** (A stimulus is a detectable change in the internal or external environment.)<br /><br />5. **b. the ectotherm does not use energy to regulate its temperature** (Ectotherms rely on external sources of heat, conserving energy that endotherms use for internal temperature regulation.)<br /><br />6. **c. nephron** (The nephron is the functional unit of the kidney, responsible for filtering blood and producing urine.)<br /><br />7. **d. salivary gland** (Salivary glands are exocrine glands, releasing saliva into ducts. The others listed are endocrine glands, releasing hormones directly into the bloodstream.)<br /><br />8. **a. are derived from cholesterol.** (Steroid hormones are lipid-soluble and derived from cholesterol. They are non-polar and act on intracellular receptors.)<br /><br />9. **b. pituitary gland** (The pituitary gland is often called the "master gland" because it controls many other endocrine glands.)<br /><br />10. **a. cortisol** (Cortisol is released by the adrenal glands, stimulated by ACTH from the anterior pituitary.)<br /><br />11. **b. endorphins** (Endorphins are natural pain relievers produced by the pituitary gland and hypothalamus.)<br /><br />12. **d. in the beta cells in the islets of Langerhans** (Beta cells within the islets of Langerhans in the pancreas produce insulin.)<br />