Psychology 304: Brain and Behaviour Lecture 18

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Psychology 304 Brain and BehaviourLecture 18
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Midterm

• The exam is worth 25 of your final grade.

• The exam will be scored out of 60 points.

• October 22 30 multiple choice questions (1 point
  each), five definitions (2 points each).

• October 24 5 short answer questions (2-6 points
  each).

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• Please arrive on time to facilitate rapid
  distribution of the exams.
• Bring a pencil, eraser, pen, and your student ID
  to the exam.
• All electronic devices must be put away before
  the start of the exam.
• Hats (e.g., baseball caps) should not be worn
  during the exam.

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The Endocrine System
1. What are some of the major hormones released
by the endocrine glands? (continued)
2. How are hormonal levels regulated?
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By the end of todays class, you should be able
to
1. identify hormones released by distinct
endocrine glands and their functions.
2. describe the causes and symptoms of disorders
associated with endocrine abnormalities.
3. describe the process of negative feedback
associated with hormonal regulation.
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What are some of the major hormones released by
the endocrine glands? (continued)
Thyroxine

• Released by the thyroid gland.

• Influences metabolic rate and alertness,
  associated with reflexes.

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Goiter
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Cretinism
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Cortisol

• Released by adrenal cortex.

• Increases levels of blood glucose, accelerates
  protein metabolism, produces anti-imflammatory
  effect.

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Cushings Syndrome
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Cushings Syndrome
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Ephinephrine, Norephinephrine

• Released by the adrenal medulla.

• Prepare the body for flight or fight, under
  direct control of sympathetic neurons.

Melatonin

• Released by pineal gland.

• Associated with sleep, maintenance of circadian
  rhythms. Antioxidant effects.

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Estradiol

• Released by the ovaries.

• Associated with the development of female
  secondary sexual characteristics, influences
  secretion of FSH and LH associated with
  ovulation.

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Testosterone

• Released by the testes.

• Associated with the development of male primary
  and secondary sexual characteristics and sperm
  production.

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Congenital Adrenal Hyperplasia
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How are hormonal levels regulated?

• Hormone release is regulated by three types of
  signals

1. Neural signals.
2. Hormonal signals.
3. Non-hormone chemical signals (e.g., glucose,
calcium).
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Hormonal NegativeFeedback Loop
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Thyroxine Negative Feedback Loop
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The Endocrine System
1. What are some of the major hormones released
by the endocrine glands? (continued)
2. How are hormonal levels regulated?