Living Systems

What would happen on a hot day if your brain did not recieve input that your body was starting to heat up?

• You would start to sweat

• You would start to overheat

• You would start to shiver

• You would not feel any effect at all

Crotisol is produced at certain times of the day, as shown in the graph. Cortisol has a positive feedback on Process A, which outputs substance Z. At what time of day will the concentration of Substance Z be at it highest if there is no other feedback on Substance Z?

Select a relationship that is similar to the following relationship. Neuron: Send electrical signal

• Cardiac cell: Muscle cell

• Muscle cell: Contraction

• Circulatory system: Blood cell

• Homeostasis: Endocrine system

Match the following

• Organism

• A single, self-contained entity that performs all the basic functions of life

• Cell

• Composed of more than one cell

• Multicellular

• The basic structural unit of all living organisms

• Digestive system

• The body system that processes food and turns it into energy for the organism

• Organ System

• Composed of several organs working together to perform a specific function

The plant tissue that transports sugars throughout the plant is known as ​ ​ (a)   , while the ​ (b)   transports water through the plant.

• phloem
• xylem

The ​ (a)   of an organ is the purpose for which it is designed. The ​ (b)   of the organ is the physical arrangement of the organ.

• function
• structure

Reorder the following in terms of levels of organization from the least complex to the most complex.

• Organism

• Organ

• Cell

• Tissue

• Organ Systems

Drag the terms to the correct level of organization.

d

c

e

b

f

a

Human

Stomach

Hydorgen

Neuron

Respiratory

Connective