Coordination and response

Groups of receptor cells responding to specific stimuli are called (a)  

Tags

NGSS.MS-LS1-8

a junction between two nerve cells, constiting of a minute gap across which impulses pass by diffusion of a neurotrasmitter is called (a)  

In bright light...

• the radial muscles in the iris contract

• the radial muscles in the iris relax

• the circular muscles in the iris contract

• the circular muscles in the iris relax

Tags

NGSS.HS-LS1-3

In dim light...

• the circular muscles in the iris relax

• the circular muscles in the iris contract

• the radial muscles in the iris contract

• the radial muscles in the iris relax

Changes in an organism´s environment are called (a)   , and are sensed by specialised cells.

Tags

NGSS.MS-LS1-8

The human nervous system is made of special cells called (a)   .

The central nervous system is made up of...

• nerves and receptors

• the brain and receptors

• receptors and spinal cord

• the brain and spinal cord

The peripheral nervous system is made up of...

• nerves and receptors

• the brain and receptors

• receptors and spinal cord

• the brain and spinal cord

Rod cells...

• are sensitive to quite dim light but they do not respond to colour

• are sensitive to quite dim light and they respond to colour

• they only function when the light is quite bright

• they only respond to colour

Cone cells....

• they do not respond to colour

• only are able to distinguis colours

• are sensitive to quite dim light but they do not respond to colour

• are able to distinguish different colours but they only function when the light is quite bright