Final answer:
The statement is false since cold temperatures do not 'preserve' decreased muscle length but can lead to stiffening and involuntary contractions like shivering.
Step-by-step explanation:
The statement 'Decreased temperature tends to preserve decreases in muscle length' is FALSE. Muscles contract and relax in response to various stimuli and temperatures. Higher temperatures generally increase nerve transmission and metabolism, which can facilitate muscle contraction, while lower temperatures can lead to stiffening of muscles, but do not 'preserve' a decreased muscle length in any operational way.
In relation to the content provided, during flexion (b), the angle between bones is decreased. Muscle contraction involves the shortening of muscle length, where typically, smaller, stabilizing muscles are moved the least. In terms of temperature regulation, smaller organisms (b) indeed lose heat at a faster rate than larger organisms primarily because they have a greater surface area relative to their mass, which facilitates heat loss.