Signalling Molecules

Question 1

Autocrine

Answer 1

Target cell is the same as the cell releasing

Question 2

Paracrine

Answer 2

Target cell is nearby cell that releases molecule

Question 3

Endocrine

Answer 3

Target cell is distant to the releasing cell

Question 4

Exocrine

Answer 4

Target cell is outside organism

Question 5

Hormone (plant and animal)

Mode of transmission and function

Answer 5

Endocrine: refers to all endocrine signalling molecules

Question 6

Neurotransmitters

Mode of transmission and function:

Answer 6

Paracrine: released by neutrons, and diffuse alone a synapse to another neutron to stimulate or inhibit it, or to another nearby tissue like muscle

Question 7

Cytokines

Mode of transmission(3) and function

Answer 7

Autocrine/paracrine/endocrine: released by immune cells to communicate with other immune cells or body cells

Question 8

Pheromones

Mode of transmission and function:

Answer 8

Signalling molecules released by cells of an organism that is received by its own species.

Eg. sex attractants for insects