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Flashcards in Intro 1 Deck (8)
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1
Q

What are the effects if someone is castrated before puberty?

A

Longer bones, little sexual behaviour, no beards or deep voice

2
Q

What was found in Berthold’s experiment on chickens?

A

Castrated chickens before sexual maturity prevented male sexual and aggressive behaviour and other secondary sexual characteristics

Re implanting testis produced normal male characteristics

3
Q

What are hormones?

A

The chemical messengers which speeding from cell to cell along the blood stream, may coordinate the activities and growth of different parts of the body

4
Q

What are the three main chemical classes that hormones fall into?

A

Proteins, steroids and amines

5
Q

What are cells called that express hormone receptors?

A

Target cells

6
Q

What are tinbergens 4 questions?

A
  1. Proximate control of causation- how does it work?
  2. Development or ontogeny- how did it develop?
  3. Evolution or phylogeny- why did it evolve?
  4. Function- what is it for?
7
Q

What was found in the winner effect study on mice?

A

Prior wins with other mice increased the likelihood of winning the test encounter

Blood testosterone on the test day increased with prior winning experience

8
Q

What is ablation?

A

The removal of a suspected source of a hormone e.g. surgical removal of a gland like the testis