MSK and endocrine function Flashcards

1
Q

What are steroids biochemically classified as?

A

Lipids

Steroids are characterized by a ring structure of many C-H bonds.

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2
Q

What are the two main types of steroids?

A
  • Direct action steroids
  • Hormones: signal action in other organs
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3
Q

What are examples of hormones

A
  • sex hormones
  • corticosteriods
  • mineralocorticoids
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4
Q

What are examples of direct action steroids?

A
  • Bile salts
  • Sterols
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5
Q

What is the primary role of bile salts?

A

Important for digestion and fat absorption
- made in the liver

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6
Q

What is the role of sterols like cholesterol?

A
  • Produce Vitamin D
  • Help with cell wall production
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7
Q

What are the main sex hormones?

A
  • Male hormones (androgens, e.g., testosterone)
  • Female hormones (estrogen/estradiol, progesterone)
  • synthesized from cholesterol
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8
Q

What is the function of glucocorticosteroids like cortisol?

A
  • Anti-inflammatory properties
  • cortisol works on the liver; uses fatty acids to increase glucose levels (for energy)
  • cortisol levels increase during times of stress; likely has a role in immune system function
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9
Q

What is the most important mineralocorticoid?

A
  • Aldosterone
  • produce in adrenal gland
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10
Q

What does aldosterone regulate?

A

Balance of Na+ and K+ by actions on the kidney

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11
Q

What are corticosteroids used for?

A
  • Anti-inflammatory
  • Pain management
  • Allergy control
  • Treatment for Addison’s disease
  • can be used to greatly improve outcomes of some condittions
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12
Q

What is Addison’s disease?

A

Adrenal insufficiency with diminished production of cortisol, glucocorticoids, mineralocorticoids, and androgens

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13
Q

Polyarteritis Nodosa

What is it and how is it dx and tx

A
  • rare
  • affects larger, muscular ateries
  • can be caused by hepatitis B
  • can cause myalgia, fatigue, hypertenion, GI dysfunction, renal involvement
  • Diagnosis may include: blood test, ESR, or urinalysis
  • imaging: radiography, CT, MRI
  • treatment: prednisone, immunosuppressants

ESR: erthrocyte sediment rate; increased = inflammation (sed rate)

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14
Q

How is the body/arteries affected in polyarteritis nodosa

A
  1. first arteries become weak, thin and stretched out
  2. narrow
  3. closed off
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15
Q

What are the signs of decreased cortisol production?

A
  • Hypoglycemia
  • Fatigue
  • Confusion

occurs in addisons

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16
Q

What are signs of decreased aldosterone

A
  • fluid and electrolyte imbalance
  • dehydration
  • important for Na/K balance

occurs in addisons disease

17
Q

Signs and symptoms of addisons disease? how is this treated

A
  • weakness
  • fatigue
  • weight loss
  • nausea/vomiting
  • muscle and joint pain
  • abdominal pain
  • hypotension

treatment: steriods/corticosteriods

18
Q

What are the potential negative effects of corticosteroids?

A
  • Myopathy
  • Osteoporosis
  • Atherosclerosis
  • Immunocompromise
  • Growth retardation
  • impede bone and wound healing (must wait if they need surgery 8-12 weeks)
  • pulmonary infections
  • gastritis
  • glaucoma/cataracts
  • mood alterations
  • headache
  • skin changes
  • diabetes mellitus

occurs with people who are chronically on steriods

19
Q

What is Cushing’s syndrome?

A
  • Hyperfunction of the adrenal gland, can be related to long-term steroid use
  • can also be an issue with pituitary gland (not as common)
  • overproduction of cortisole leads to protein catabolic state
20
Q

What does prolonged steriod use lead to

A
  • cushings
  • hypervolemia, hypernatremia, and hypokalemia
  • assoicated with hyperglycemia
21
Q

What are physical characteristics of Cushing’s syndrome?

A
  • Round face
  • Supraclavicular fat pads
  • Truncal obesity
  • Muscle wasting and weakness
  • pear/apple distribution

can limit these with exercises

22
Q

What are the physiological effects of cushings

A
  • osteoporosis
  • HTN
  • impaired wound healing
  • easy bruising
  • impaired reproductive function
  • diabetes mellitus
  • psychiatric or emotional disturbances
  • women may develop fascial hair, deeper voice, breast atrophy
23
Q

What are anabolic androgenic steroids?

A
  • Synthetic substances similar to testosterone that increase muscle and male characteristics
  • anabolic: increase muscle
  • androgenic: increase male characteristics
  • characterized as appearance and performance enhancing drugs
24
Q

What are some reasons people take anabolic steroids?

A
  • Increase muscle mass
  • Improve performance
  • Improve physical appearance
  • can be legally prescribed in some cases
  • not as addictive as other drugs but has some addictive characteristics
25
Q

What are some of the psychiatric changes/mood swings that occur when people take anabolic androgenic steriods

A
  • still addictive/effect neurotransmitters
  • go through withdrawal
  • mania
  • aggression
  • depression
  • paranoid jealousy
  • extreme irritability
  • delusions
  • poor judgement
26
Q

What are the potential negative effects of anabolic steroid use?

A
  • Hypertension
  • Cardiac hypertrophy
  • Atherosclerosis
  • Jaundice / liver damage
  • increase in LDL
  • LE fluid retention
  • premature skeletal maturation
  • GI upset/diarrhea
  • headaches
  • acne

doses taken by athletes or others may be much higher than in a perscription

27
Q

What gender-specific effects can anabolic steroids have on males?

A
  • Testicular shrinkage
  • Gynecomastia: enlargement of breast tissue
  • Reduced sperm count/infertility
  • baldness
  • prostate cancer
28
Q

What gender-specific effects can anabolic steroids have on females?

A
  • Male-pattern baldness
  • Facial hair/hypertrichosis
  • Clitoral enlargement
  • deeper voice
  • change in menstrual cycle

-

29
Q

What is Relative Energy Deficiency in Sport (RED-S)?

A

Low Energy Availability (LEA) affects hormone production and release

30
Q

What hormonal changes can occur in females due to LEA?

A
  • Decrease in FSH
  • Decrease in LH
  • Reduction in estrogen production
  • functional hypothalamic ammenrrhea
  • impaired bone mineral density (osteopenia)
31
Q

What hormonal changes can occur in males due to LEA

A
  • causes decreased testosterone
  • decrease BMD
32
Q

What are other effects of low energy availability?

A
  • Increased cortisol
  • Decreased leptin, insulin growth factor, growth hormone
  • change in mood
  • decrease appetite
  • fatigue
  • immune function decreased
  • GI dysfunction

PT role: education + monitor vitals as long term vitals can increase due to increase in cortisol from increased LEA

33
Q

What is the treatment for Addison’s disease?

A

Corticosteroids

34
Q

What is the relationship between aging and hormone levels?

A

Post-menopause leads to decreased estrogen and late onset hypogonadism associated with reduced testosterone

35
Q

Risk factors for LEA

A
  • decrease dietary intake
  • increased exercise energy expenditure
  • desire for weight loss
  • disordered eating/training behavior
  • sport identiy
  • changes in hunger hormones
36
Q

LEA: acute exposure risks

A
  • reduced blood glucose
  • reduced leptin levels
  • disruption in the pulsatility of GnRH, LH, T3
  • cortisol
  • fatigue
  • mood changes
  • low sex drive
  • lower muscle protein synthesis
37
Q

LEA: Long term exposure risk

A
  • endorcrine disruptions
  • reproductive dysfunction
  • impaired bone health
  • dyslipidemia
  • bradycardia/hypotension
  • hypoglycemia
  • low resting metabolic rate
  • immunological suppression
  • injuries
  • impaired performance
  • GI problems
  • reduced appetite
  • eating disorders
38
Q

aging: post menopause what occurs in women and how is it treated often times

A
  • estrogen replacement
  • oral contraceptives, transdermal estrogen
  • decreased estrogen during post menopause
  • decreased BMD
39
Q

MSK dysfunction and aging: Males

A
  • reduced testosterone
  • late onset hypogonadism
  • associated with DM, overweight, obesity
  • sacropenia
  • osteoprosis: bisphosphonates to improve BMD?