Question

Question 21 (1 point) Saved Paracrine signaling uses what types of cells to allow for fast signaling? O Nerve cells Somatic Cells Epithelial cells O none of these Saved Question 22 (1 point) Endocrine signals are.... Short in duration and more gradual in their effect longer lasting and more gradual in terms of their effects short in duration, and immediate in their effect Longer lasting and immediate in their effect

Answer 1

21. Answer : A ; Nerve cells.

Explanation : In paracrine signalling,a molecule released by one cell acts on neighboring target cells. An example is provided by the action of neurotransmitters in carrying signals between nerve cells at a synapse.

22. Answer : B ; Longer lasting and more gradual in terms of their effects.

Explanation : When cells need to communicate a message over a long distance, they can use the endocrine signalling. These types of signals usually produce a gradual response but have a longer-lasting effect.

23. Answer : C ; Short in duration and immediate in their effect.

Explanation : Paracrine signals move by diffusion through the extracellular matrix. These types of signals usually express quick response that last only a short amount of time.

24. Answer : D ; All the above.

Explanation : Calcium is required for muscle contraction and it's also helps in regulating heart beat and fluid balance within cells. It's also helps in building strong bones and teeth, and it's also helps in clotting time and nerve impulse transmission. It's also give strength to the body.