Photosynthesis and Cellular Respiration Flashcards
How many organs do flowering plants have?
Three or Four
What are the three types of organs make up the body of a plant?
-The leaves
-The stem
-The root
True or False: Each of these organs make it possible for the plant to live and grow.
True
What is the fourth organ in a plant, and what is it in many plants?
The reproductive organ, which in many plants, is the flower.
What is a leaf’s most important job?
To provide a large surface area where photosynthesis can take place.
What happens if photosynthesis produces more glucose than the leaf needs?
The excess is converted into starch and stored in the leaf.
List the specialized cells of a leaf, which help this organ perform its most important functions. (10 of them)
-Cuticle
-Upper Epidermal Cells
-Palisade Tissue Cells
-Vascular Bundle
-Xylem
-Phloem
-Spongy Parenchyma Cells
-Lower Epidermal Cells
-Guard Cells
-Stomata
What are the upper surfaces of a leaf made of?
A sheet of dermal tissue called the epidermis.
What do the cells of the epidermis secrete that helps reduce the amount of water that evaporates from the leaf’s surface?
A waxy cuticle
What is the main function of the epidermis?
Protection.
True or False: Epidermal cells do not perform photosynthesis.
True
The sunlight passes through the epidermal cells to the ____________ _____.
Photosynthesizing cells.
What type of tissue is located between the upper and lower surface of a leaf?
Mesophyll Tissue
What does Mesophyll Tissue consist of?
Palisade Tissue cells and spongy Parenchyma cells
What cells are specialized to perform most of the photosynthesis in the leaf?
Palisade Cells
True or False: Palisade cells are arranged in lines that ressemble the long poles used in the walls, or palisades, of old fortresses.
True
The tops of palisade cells are arranged to meet the Sun’s rays head on, so that the rays pass through the ______ ___ _____ _______.
Length of the cell.
As the rays of light journey through the cell, they encounter the many __________, _______ __________ _______ ______.
Chloroplasts, where photosynthesis takes place.
True or False: Palisade cells are very active, so they are packed with mitochondria, which perform cellular respiration.
True
What is located below the palisade cells?
A layer of spongy parenchyma cells.
How are parenchyma cells packed?
Loosely to form a network with open spaces, like a sponge.
What do these open spaces contain? (List them)
The gases needed or produced by photosynthesis: water vapour, oxygen, and carbon dioxide.
What is the lower surface of the leaf made of?
An epidermis that is critical for the exchange of gases between the leaf and the outside environment.
To allow the gases to move in and out, ______ _______ are scattered across the surface of the leaf.
Guard Cells
What do Guard cells do?
Change their shape to control the opening and closing of pores in the leaf, which are called stomates or stomata.
What are the stomata connected to?
The open spaces in the spongy parenchyma cells.
Guard cells and stomata play a significant role in ____________.
Transpiration
Transpiration Definition
The evaporation of water from leaves.
What enters through these pores and exits through them?
Carbon dioxide enters through these pores, and oxygen and water vapour exit through them.
True or False: In every cell with chloroplasts, photosynthesis is occurring.
True
What happens during photosynthesis?
Light energy from the Sun combines with carbon dioxide from the air and water from the soil to produce glucose.
Chemical Equation that shows products and reactants of Photosynthesis
6CO2 + 6H2O + Light Energy (arrow) C6H12O6 + 6O2
What is Glucose?
A carbohydrate used by both plant and animal cells as a source of energy.