8.3 INTRO: Objective: MYONEURAL JUNCTION Unit 2: Support & Movement 8.3 Aim: How do muscles get a signal to contract or relax? AGENDA Introduction Mini-Lesson Summary Work Period Exit Slip Do Now Objective: I will describe the signal transmission across the Myoneural Junction. INTRO: MYONEURAL JUNCTION

8.2 Aim: How do muscles get a signal to contract or relax? Unit 2: Support & Movement 8.2 Aim: How do muscles get a signal to contract or relax? AGENDA Introduction Mini-Lesson Summary Work Period Exit Slip Real-world connection Impulse Speed Males Vs. Females Vocabulary motor neuron, synapse, neurotransmitter, motor end plate, neuromuscular junction, motor unit, acetylcholine, sliding filament model, troponin, tropomyosin, oxygen debt. Do Now Work Period Exit Slip Do Now Introduction Mini-Lesson Summary

The Neuromuscular (myoneural) Junction

Neurons that control skeletal muscle are called MOTOR NEURONS.   Neurons that control skeletal muscle are called MOTOR NEURONS. These motor neurons meet the muscle cells at a point called the SYNAPSE. There is NO physical contact – much like talking on the phone. The muscle cell area is called the MOTOR END PLATE When one motor neuron branches and connects to many muscle cells (fibers) it is called a MOTOR UNIT A NEUROTRANSMITTER, in the case of muscles it is acetylcholine, is released at the synapse and stimulates an impulse causing the muscle to contract. This SITE is call the NEUROMUSCULAR (MYONEURAL) JUNCTION

Objective: I WILL COMPARE THE SPEED OF IMPULSES FOR MALES AND FEMALES. Unit 2: Support & Movement 8.3 Aim: How do muscles get a signal to contract or relax? AGENDA Introduction Mini-Lesson Summary Work Period Exit Slip Do Now Objective: I WILL COMPARE THE SPEED OF IMPULSES FOR MALES AND FEMALES. LAB: SNAPS

SNAPS: Lab Activity MATERIALS: PROCEDURE ANALYSIS CLASS AVERAGES Partner & Stopwatch PROCEDURE 1. Practice snapping your fingers – make sure there is a CLEAR snap sound. 2. Have your partner set the time for 15 seconds. 3. See how many CLEAR snaps you can make in 15 seconds. 4. Record your information on your notes. 5. Complete the procedure with the other partner. ANALYSIS Record the information from other groups / tables so you have at least 8 samples. Compare Male and Female results and record the information on your data table CLASS AVERAGES CONCLUSION – Complete in your notes

LAB: 8.3 Objective: SNAPS – Turn In Unit 2: Support & Movement 8.3 Aim: What is the physiology of a muscle contraction? AGENDA Introduction Mini-Lesson Summary Work Period Exit Slip Do Now Objective: I will list the steps in the sliding-filament action of muscular contraction. LAB: SNAPS – Turn In

8.3 Vocabulary Aim: What is the physiology of a muscle contraction? Unit 2: Support & Movement 8.3 Aim: What is the physiology of a muscle contraction? AGENDA Introduction Mini-Lesson Summary Work Period Exit Slip Vocabulary Sliding filament model, actin, myosin, troponin, tropomyosin, ATPase, acetylcholinesterase, creatine phosphate Do Now Work Period Exit Slip Do Now Introduction Mini-Lesson Summary

Sliding Filament Model