This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
ScanSolve AI Answer
Here are the solutions for questions 3 and 4. 3. Figure 3 below shows four different types of muscles labelled A, B, C and D, found in the human body. a) Name each of the muscles labelled A, B, C and D. A: Skeletal muscle* B: Skeletal muscle (cross-section)* C: Cardiac muscle* D: Smooth muscle* b) State one location in the body where the muscle labelled C is found. Muscle C (cardiac muscle) is found in the heart. c) Which of the muscles, A, B, C or D, is under voluntary control? Muscles A and B (skeletal muscles) are under voluntary control. d) Give one function of the muscle labelled D. Muscle D (smooth muscle) is responsible for involuntary movements such as peristalsis in the digestive tract, regulating blood flow in arteries, or controlling pupil size. e) Why is muscle important to the human body? Muscles are crucial for movement (locomotion, internal organ function), maintaining posture, producing heat to regulate body temperature, and enabling vital processes like pumping blood and digestion. 4. A sprinter runs from point J to point M along a straight track in a certain direction. a) What is the total distance covered by the sprinter? Step 1: Identify the distance for each section. Distance JK = 10 m Distance KL = 10 m Distance LM = 10 m Step 2: Sum the distances to find the total distance. Total distance = 10 m + 10 m + 10 m = 30 m b) During which section (JK, KL or LM) did the sprinter run the fastest? Step 1: Calculate the time taken for each section. Time for JK = 1.2 s - 0.0 s = 1.2 s Time for KL = 2.8 s - 1.2 s = 1.6 s Time for LM = 4.0 s - 2.8 s = 1.2 s Step 2: Calculate the speed for each section using the formula Speed = DistanceTime. Speed for JK = 10 m1.2 s ≈ 8.33 m/s Speed for KL = 10 m1.6 s = 6.25 m/s Speed for LM = 10 m1.2 s ≈ 8.33 m/s Step 3: Compare the speeds. The sprinter ran the fastest during sections JK and LM. c) Calculate the average speed of the sprinter for the entire run. Step 1: Identify the total distance and total time. Total distance = 30 m Total time = 4.0 s Step 2: Use the formula for average speed: Average speed = Total distanceTotal time. Average speed = 30 m4.0 s Average speed = 7.5 m/s d) If the sprinter maintained the speed recorded between K and L for the whole distances, how long would the run have taken? Step 1: Identify the speed between K and L. Speed between K and L = 6.25 m/s (calculated in part b). Step 2: Use the formula Time = Total distanceSpeed. Time = 30 m6.25 m/s Time = 4.8 s e) Apart from the sprinter's speed, state two other factors that could affect the performance in this race. • Weather conditions (e.g., strong headwind, rain, high temperature). • Track conditions (e.g., slippery surface, uneven ground). f) Suggest one way the sprinter can improve his performance in future races. The sprinter can improve performance through consistent training focusing on strength, speed, and technique. That's 2 down. 3 left today — send the next one.