Co-ordination and Control

Question 1

The ions involved in the propagation of the action potential are

Accepted Answer

Sodium and Potassium

Question 2

Hydrophillic hormones include;

Accepted Answer

proteins, amino acids, peptides

Question 3

When a protein, amino acid or peptide ligand binds the a receptor on the outside of the cell,

Accepted Answer

G protein is activated

Question 4

A chemical released into the external environment, causing a response in another animal

Accepted Answer

pheromone

Question 5

An intrinsic stimulus that can initiate apoptosis includes

Accepted Answer

DNA damage, Cellular stress

Question 6

Lipophillic hormones activate a cell by;

Accepted Answer

attaching to a receptor inside the cell

Question 7

Hormones travel to target cells via what route?

Accepted Answer

via the blood plasma

Question 8

Hydrophillic hormones activate at cell by;

Accepted Answer

attaching to the receptor on the cell membrane

Question 9

A type of plan hormone that causes stomata to close in extreme dry conditions is

Accepted Answer

IAA, abscisic

Question 10

A type of plant hormone that can induce cell elongation and reproduction

Accepted Answer

gibberellin, auxin

Question 11

Ligand attaches to a receptor and initiates a cascade of events to cause a change in a cell is

Accepted Answer

signal transduction

Question 12

In a reflex arc the message passing between the various neurons must be in which order?

Accepted Answer

sensory neuron, inter neuron, motor neuron

Question 13

Neurons that make up the central nervous system - ie the brain and spinal chord are

Accepted Answer

inter neruons, relay neurons

Question 14

A type of plant hormone that cause fruit ripening and leaf drop.

Accepted Answer

ethylene

Questions 14