Biochem Chapt 16

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Dorky48
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Biochem Chapt 16
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2013-04-08 22:27:32
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Biochem chapter 16
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Biochem chapter 16
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  1. 1) The liver performs all of the following functions except

    A) Blood glucose regulation
    B) Processing of foreign molecules
    C) Storage of energy in the form of fat
    D) Synthesis of plasma protein
    E)  Synthesis of urea
    C
  2. 2) During  fasting and prolonged starvation, skeletal muscle

    A) Protein is degrades to provide amino acids to the liver for gluconeogenesis
    B)  Released as fat into the blood for storage in adipose tissue
    C)  Is synthesized from blood lactate
    D) Converts glutamine molecules  to proline
    E) None of the above are correct
    A
  3. 3) The cells that line the small intestine, which are responsible for the absorption of nutrients into the body, are called

    A) Adipocytes
    B) Tubule cells
    C) Hepatocytes
    D) Enterocytes
    E) Epithelial cells
    D
  4. The functions of the kidney include all of the following except

    A) Blood pH regulation
    B) Body water regulation
    C) Reabsorption of electrolytes, sugars, and amino acids from the urinary filtrate
    D) Filtration of blood plasma which results in the excretion of water-soluble waste products
    E) Production of urea from ammonia
    E
  5.  The most distinctive characteristic of living organisms is

    Cellular structure
    The autonomous capacity to sustain adequate operating conditions
    Utilization of carbon compounds as food
    Complex cellular mechanisms
    Utilizing environmental materials as energy sources
    B
  6. 6) A simple system for information flow is composed of three components : reception, transduction and response.  In multicellular organisms hormones play a role in which phase?

    A)  Reception
    B)  Transduction
    C)   Response
    D) Hormones are not involved in the process of information flow
    E) Both A and B are correct
    A
  7. 7) In a metabolic steady state the rate of anabolic processes is approximately equal to:

    Catabolic processes 
    Cellular energy needs
    Nutrient intake
    Cellular repair and growth
    B and C
    A
  8. 8)  In animals the vast majority of water soluble hormones are 

    Peptides
    Steroids
    Polypeptides
    Carbohydrates
    A and C
    E
  9. 9) The molecules that mediate the growth-promoting actions of GH are referred to as the

    A) Interferons
    B) Mitogens
    C) Insulin-like growth factors
    D) Both B and C are correct
    E) None of the above are correct
    C
  10. 10) Symptoms of uncontrolled diabetes mellitus include all of the following except

    A) Hyperosmolar hyperglycemic nonketosis
    B) Hypoglycemia
    C) Hyperlipoproteinemia
    D) Ketoacidosis
    E) Polyuria
    B
  11. 11) Steroid hormones

    A) Are transported in blood attached to transport proteins
    B) Bind to intracellular receptors
    C) Diffuse through the plasma membrane of target cells
    D) Both A and B are correct
    E) All of the above are correct
    E
  12. 12) Which of the following is not a major source of extracellular signal molecules?

    Steroids
    Modified amino acids
    Carbohydrates
    Fatty acids
    Proteins
    C
  13. 13) The biological effects of atrial natriuretic factor appear to be mediated by ______.

    A) cAMP
    B) cGMP
    C) PIP2
    D) AG
    E) IP3
    B
  14. 14) In animals the ______ system has a primary responsibility for co-ordinating metabolism.

    Nervous
    Lymphatic
    Hepatic
    Endocrine
    A and D
    E
  15. 15) The IP3 receptor

    A) Binds cGMP
    B) Is associated with Gi
    C) Is a calcium channel
    D) Both B and C are correct
    E) All of the above are correct
    C
  16. 16) A DNA segment that binds a hormone-receptor complex is called a _________.

    A) DRE
    B) DAG
    C) EGF
    D) HRE
    E) IGF
    D
  17. Calmodulin is a 

    A) Transmembrane receptor
    B) Calcium-binding protein
    C) HSP
    D) Plant hormone
    E) A, B and C are correct
    B
  18. 18) Insulin resistance is

    A) A risk factor for Type I diabetes
    B) A risk factor for Type II diabetes
    C) Caused by excessive production of ANF
    D) Associated with damage to the adrenal gland
    E) None of the above are correct
    B
  19. 19)  Receptors for most water soluble hormones are located in what part of the cell?

    Plasma membrane
    Endoplasmic reticulum
    Nucleus
    Cytoplasm
    Nuclear membrane
    A
  20. 20)  Which of the following is not a second messenger molecule?

    A cGMP 
    B) cAMP
    C) Calcium
    D) Steroids
    E) Inostol-phospholipid system
    D
  21. 21) The most prominent mechanism to prevent excessive hormone syntheis is

    Desensitization
    Downregulation
    Feedback inhibition
    Target cell stimulation
    Sensitization
    C
  22. 22) Enterocytes require large amounts of energy supplied by

    Glucose oxidase
    Fatty acid degradation
    Lactose oxidation
    Glutamine
    Alanine
    D
  23. 23) The organ responsible for processing most foreign molecules is

    Intestine
    Stomach
    Liver
    Kidney
    Blood
    C
  24. 24) Insulin-resistance is associated with all of the following except _______.

    A) Obesity
    B) Desensitizatioin
    C) Down-regulation
    D) IDDM
    E) NIDDM
    D
  25. 25) Biochemical signal molecules include _________.

    A) Amino acids
    B) Fatty acid derivatives
    C) Steroids
    D) Peptides
    E) All of the above are true
    E
  26. 26) Receptor tyrosine kinases are transmembrane receptors that bind ligands such as

    A) Insulin
    B) Epidermal growth factor
    C) Platelet derived growth factor
    D) Insulin like growth factor
    E) All of the above
    E
  27. 27) Which of the following molecules is a second messenger? 

    A) TSH
    B) cGMP
    C) Proline
    D) Calcium
    E) Both B and D are correct
    E
  28. 28 The organ responsible for the regulation of blood pH is

    Liver
    Kidney
    Intestine
    Brain
    Stomach
    B
  29. 29) Most diabetic complications are the result of 

    A) Glycation
    B) Hyperglycemia
    C) Damage to the vascular system
    D) Both A and B are correct
    E) All of the above are correct
    E
  30. 30) The principle target tissues of insulin include

    A) Skeletal muscle
    B) Liver
    C) Adipose tissue
    D) Both B and C are correct
    E) All of the above are correct
    E
  31. 31) Animals employing several mechanisms to prevent excessive hormone action and release. Examples include which of the following? 

    Genetic regulation
    Feedback inhibition
    Desensitization
    Down regulation
    All of the above are true
    E
  32. 32) Which of the following molecules do GPCRs not respond to?

    Catecholamines
    Oxytocin
    Light
    Dopamine
    Insulin
    E
  33. 33) Which of the following is a role of PKB

    Stimulation of glycogen synthesis
    Inhibition of lipolysis
    Glucose transport into adipocytes
    Activation of mTOR
    All of the above are roles of PKB
    E
  34. 34)  An example of a cytokine is

    Epidermal growth factor
    Interleukins
    Interferons
    Insulin-like growth factors
    B and C
    E
  35. 35) The most serious acute symptom of type 1 diabetes is 

    Anemia
    Ketoacidosis
    Hypoglycemia
    Insulin resistance
    Both A and C are correct
    B
  36. Hyperosmolar hyperglycemic non-ketosis can occur in type _____
    Diabetes

    Type I
    Type II
    Insulin dependent diabetes
    Is present in all forms of diabetes
    Is not a symptom of diabetes
    B
  37. During periods of starvation muscle reduces its consumption of glucose. This spares its use for which of the following organs?

    Liver
    Heart
    Kidneys
    Brain
    Lungs
    D
  38. Leptin is secreted by which of the following tissues?

    Brain
    Liver
    Adipose tissue
    Muscle
    Gasterintestinal tract
    C
  39. The brain consumes about _______% of the body’s energy.

    10
    20
    30
    40
    50
    B
  40. The phosphatidylinositol cycle mediates the action of all of the following except ______.

    Acetylcholine
    Insulin
    Glucagon
    Vasopressin
    GRH
    C
  41. 41)) Metabolism of fructose in the liver rapidly depletes which of the following


    NADPH
    ATP
    Triose phosphate
    AMP
    Glucose
    B
  42. 42) An autoimmune disease caused by the destruction of the insulin producing beta cells of the pancreas is called 

    Hyperglycemia
    Dyslipidemia
    Glucosuria
    Type II diabetes
    Type I diabetes
    E
  43. Extreme thirst and frequent urination in diabetics is directly caused by 

    Osmotic diuresis
    Hyperglycemia
    Dyslipidemia
    Glucosuria
    Adipoisledimia
    D
  44. 44) Type II diabetes is uniquely characterized by:

    Hyperinsulinemia
    Depressed insulin levels
    Insulin resistance
    Depressed glucose levels
    A and C
    E
  45. 45) Which of the following carbohydrates is a major contributing cause of 
    dyslipidemia non-alcoholic fatty liver disease?

    Glucose
    Ribose
    Fructose
    Galactose
    Xylose
    C
  46. 46) Urea synthesis is the responsibility of which organ of the body?


    Kidney
    Liver
    Intestine
    Stomach
    Lung
    B

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