Which of the following is a type of local signaling in which a cell secretes a signal molecule that affects neighboring cells? a) hormonal signalingb) synaptic signalingc) paracrine signalingd) autocrine signaling

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.