PSYCH 112 Lecture Notes - Lecture 3: Ghrelin, Muscle Dysmorphia, Plasma Osmolality
Document Summary
No comprehensive list or typology of motivations. Endocrine system: hormones are chemical messengers in blood streams, gland: group of cells, some attached to other organs. Nervous and endocrine system are specialized for command-and-control of our bodies and keep us alive. Shivering only exercise that does not increase amount of air flow across skin cooling. Dilation of surface blood vessels more blood to be brought to surface so heat can escape lowering of small body hairs. Most temperature control is behavioral, greatly increasing amount range of temperatures humans can endure. Command and control is centralized in brain. Centralization is required because our primary self-maintenance strategies are behavioral. Ultradian rhythms >24 hours menstrual cycle, annual cycles. Circadian rhythms 24 hours sleep and waking. Infradian rhythms <24 hours sleep stages. Blood plasma volume detected in heart (amount of blood plasma in system: if too low, become thirsty.
