28.) What is an example of opposing muscle groups?
Pectoralis and Deltoids
Gastrocnemius and Hamstring
Pectoralis and Triceps
Hamstring and Quadriceps

Hamstrings and Quadriceps.

Explanation:

Opposing muscle groups also known as "antagonistic muscles" are those that oppose the action of the other. Typically the easiest way to match these opposing muscles are on the opposite sides of the body. Example, your quads are on the front of your leg and hamstring on the back. Conveniently the quads are hip flexors while the hamstrings are hip extensors. Quads are knee flexors and hamstrings are knee extensors. So depending on the joint that they cross they will perform different actions.

Another example is the pecs and rhomboids, biceps and triceps AND SOO ON.

The agonist is typically the muscle thats flexes while the antagonistic is the one that relaxes and stretches.

his week a heat wave will be hitting, and most of the country will be experiencing temperatures above average for july. due to humidity, the temperature outside can feel even warmer than it actually is. this adjusted temperature, often referred to as the “feels like” temperature is called the heat index. the chart shows the heat index, which is calculated based on temperature and relative humidity. use this chart to answer the following questions.