LS15 - Week 7 notes
LS15 - Week 7 notes Life Science 15
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This 1 page Class Notes was uploaded by AK315 on Thursday March 10, 2016. The Class Notes belongs to Life Science 15 at University of California - Los Angeles taught by Professor Phelan in Winter 2016. Since its upload, it has received 37 views. For similar materials see Life: Concepts and Issues in Biology at University of California - Los Angeles.
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Date Created: 03/10/16
Week 7 Hormones and how they work • Hormones are chemical signals, secreted into body ﬂuids. • May reach many cells, but only target cells respond. • They only have an eﬀect if that cell has a receptor (Which is a molecule that receives chemical signals from outside the cell) • Hormones elicit speciﬁc responses in target cells • Who secretes them? ◦ Pineal - melatonin ◦ Hypothalamus - ◦ Pituitary ◦ Adrenal - adrenaline, cortisol ◦ Pancreas - Insulin ◦ Ovaries - estrogens, progesterone ◦ Testes - androgens, testosterone • Cortisol ◦ Make glucose available (From non-carbs) ◦ Act on skeletal muscle (break down protein) ◦ High dose • Adrenaline ◦ Senses danger - heart rate goes up ◦ Increases glycogen breakdown (in liver and muscles). Releases fatty acids from fat cells. ◦ Increase rate/volume of heart-beats ◦ Dilates bronchioles in lungs - delivers more oxygen to cells • Oxytocin ◦ A peptide hormone ◦ Produced in hypothalamus; released fro pituitary gland ◦ Inﬂuences people’s trust in others. ◦ Encourages social attachments Hormones can aﬀect thoughts and behaviors • Mental rotations ◦ MALE score - 3.5 ◦ FEMALE - 1.3 • Object memory ◦ MALE score - 13.7 ◦ FEMALES score - 15.5 • Testosterone inﬂuences mental rotation capabilities in men + Estrogen helps females with object memory
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