Question

Designer Muscles:  In this activity, you play the part of a mad scientist who will genetically re-engineer one of the common human muscle types, changing a feature to give it the desired characteristic.

For each question, you’ll be given one of the standard human muscle types, then one functional difference the new muscle you’re designing must have.  You indicate one structural difference between the standard and the new type that will create the desired feature in the new type. For example, if the question was “Gut smooth muscle, but more red” an answer would be “more myoglobin”. Sometimes multiple answers are possible; you need to give only one unless told otherwise.

1.          Cardiac muscle, but its rate never changes.

2.          Skeletal muscle, but always does synchronous recruitment; never asynchronous.

3.          Skeletal muscle, but better at exerting force when very stretched.

4.          Slow twitch skeletal muscle, but more powerful.

5.          Smooth muscle, but can not experience tetany.

6.          Smooth muscle, but more powerful. Choose a feature that is notinvolved with ATP production.

7.          Smooth muscle, but better at bringing in oxygen and having it available at all times.

Answer 1

1.Myocardium is responsible for the hearts pumping action and cardiac muscle is only found in myocardium,contracts in response to signals from the cardiac contraction system to make the heart beat.

2. Rectus muscle.Rectus muscle is timed to contract tetanically and relax during left ventricular ejection.

3.Biceps muscle.it is involved in the movement of jaws and bones

4. Tonic muscles.they are slow twitched dominant composed of atleast 51%slow twitch muscle fibres.

5 walls ofblood vessels

6

7 Arteries