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APHY 102 Anatomy and Physiology Study Questions Endocrine System with correct Answers

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APHY 102 Anatomy and Physiology Study Questions Endocrine System with correct Answers List the steps of the action of most non steroid hormones 1. Combines with receptor site on membrane, activating G protein 2. Adenylate cyclase is activated by G protein in target cell 3. Adenylate cyclase con...

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  • April 17, 2024
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  • 2023/2024
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APHY 102 Anatomy and Physiology Study
Questions Endocrine System with correct
Answers
List the steps of the action of most non steroid hormones
1. Combines with receptor site on membrane, activating G protein
2. Adenylate cyclase is activated by G protein in target cell
3. Adenylate cyclase converts ATP to Cyclic AMP
4. Cyclic AMP activates protein kinases
5. Protein kinases activate protein substrates in the cell that change metabolic processes
6. Cellular changes produces the hormones effects


Cyclic AMP
Secondary chemical messenger that directs the synthesis of protein by ribosomes


Adenylate cyclase
converts ATP to cAMP


cAMP
cyclic adenosine monophosphate


Contrast the definitions of endocrine gland and exocrine gland
Endocrine. is ductless, Exocrine. has ducts; Endocrine. secretes to the blood stream, Exocrine. secretes
directly to target organ


Explain the specificity of a hormone for its target cell
A hormone's target cells have specific receptors that other cells lack, made of proteins or
glycoproteins with binding sites for a specific receptor


List six general functions of hormones
1. Help regulate metabolic processes
2. Control the rates of certain chemical reactions
3. Aid in transporting substances through membranes
4. Help regulate water balance
5. Help regulate electrolyte balance
6. Help regulate blood pressure
7. Play roles in reproduction, development, and growth


Explain how hormones can be grouped on the basis of their chemical composition
They can be either steroids or steroid-like, or nonsteroids which include amines, peptides, proteins, or
glycoproteins


List the steps of steroid hormone action
1. Diffuses through plasma membrane
2. Combines with protein receptors in the nucleus
3. Interacts with receptor complex activates/inhibits a gene
4. Influences the transcription of DNA
5. New proteins or enzymes carry out the effects of hormone

, Explain how prostaglandins are similar to hormones and how they are different
1. Paracrine substances
2. Very potent in small amounts
3. not stored in cells, but synthesizes just before release
4. rapidly inactivated after use
5. can activate/inhibit adenylate cyclase
-control cAMP production
-alter a cell's response to hormones
6. Has a wide variety of effects: contract/relax smooth muscle; stimulate/inhibit secretions; regulation
of BP; controlling movement of H2O & Na+ in kidneys; promote inflammation


Diagram the three mechanisms that control hormone secretion, including the negative feedback in
each mechanism
1. Hypothalamus
2. Nervous System
3. Changing level of substances in plasma


Describe the location and structure of the pituitary gland
Located at the base of the brain, attached to the hypothalamus by the infundibulum; has two lobes:
anterior and posterior


List the hormones that the anterior pituitary gland secretes
1. GH (growth hormone)
2. PRL (prolactin)
3. TSH (thyroid-stimulating hormone)
4. ACTH (adrenocorticotropic hormone)
5. FSH (follicle-stimulating hormone)
6. LH (Luteinizing hormone)


Explain two ways that the brain controls pituitary gland activity
The hypothalamus controls pituitary gland activity in two ways: one by capillary vessels that send
signals down the infundibulum to the anterior pituitary, and the other by nerve impulses to the
posterior pituitary


Releasing hormones come from which of the following?
a. thyroid
b. anterior pituitary gland
c. posterior pituitary gland
d. hypothalamus
e. pineal gland
d. hypothalamus

Match the following hormones with their actions.
1. GH
2.TSH
3. PRL
4. ACTH
5. FSH
6. LH

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