EQN 3050 Lecture Notes - Lecture 1: Fetlock, Motor Unit, Endoplasmic Reticulum

• School: University of Guelph
• Department: Equine
• Course: EQN 3050
• Professor: Wendy Pearson

Document Summary

Muscle contraction (lecture 2: arrival at ap and release of ach, aps propagate through t-tubules, proteins in t-tubules open ca2+ channels in sarcoplasmic reticulum, ca2+ is released from sarcoplasmic reticulum. 3 types of muscle = smooth (involuntary), cardiac (heart), skeletal (striated/voluntary) Limbs, neck, face, tongue gut, blood vessels, lymphatic vessels, resp. ~ skeletal muscle can take energy and turn it into motion (skeletal muscles attached at some pt to allow shortening to cause contraction) ~ partially voluntary (smooth muscle) due to small level of control. ~ mitochondria density related to amount of energy required for that organ (~ skeletal muscle may have variation in mitochondrial volume) ~ horses = unique - the way they perform is very different bc of the mitochondria density in the different muscle fibres. Skeletal muscle ~ stripes caused by sarcomeres (functional units of muscle), sarcomeres shorten and cause contraction.