Question

1. motor proteins are involved in all of the following roles except: cell division muscle contraction sperm swimming temperature regulation 2) the chemical messengers that are made in one part of the body but act on cells in other parts of the body are called enzymes hormones peptides neurotransmitters

Explanation:

1. Motor proteins play roles in cell - division (help with chromosome movement), muscle contraction (myosin is a motor protein), and sperm swimming (dynein in flagella). They are not involved in temperature regulation.
2. Hormones are chemical messengers produced in one part of the body and act on cells in other parts of the body. Enzymes are mainly for catalyzing reactions, peptides can be part of many functions but not the general term for such messengers, and neurotransmitters act across synapses in the nervous system.

Answer:

1. D. Temperature regulation
2. B. Hormones