4.1- Muscle Roles and Types of Contraction 1 Quiz Please sign up for the course before taking this quiz. A muscle is behaving as an agonist when:1 It contracts to initiate movement. The two ends of it move away from each other. It relaxes to initiate movement. It contracts while lengthening. A muscle contraction is concentric when:1 The distance between the two ends of the muscle increases. The distance between the two ends of the muscle decreases. All muscle contractions are concentric. The distance between the two ends of the muscle stays the same. When a muscle is behaving as an agonist, it is:1 It is not possible to know if an agonist is contracted without more information. sometimes contracted. always contracted. never contracted. The main movement that takes the person pictured above from the first pose to the next one is that she straightens the elbows. Where would the agonist be located for that action?1Uttanasana to Ardha Uttanasana Between the front of the upper arm and the back of the lower arm Between the front of the wrist and the front of the shoulder Between the back of the upper arm and the back of the shoulder Between the back of the upper arm and the back of the lower arm Between the front of the upper arm and the front of the lower arm When moving from the first pose to the second pose, what is the likely force that takes the back from being rounded to being more flat?1Uttanasana to Ardha Uttanasana An external force Gravity Wishful thinking Leverage Levitation When moving from the first pose to the second pose, what is the likely force that changes the shape of the neck?1Ardha Uttanasana to Uttanasana An external force Leverage Gravity Direct muscular control Humility
